JP4241073B2 - Passive components - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a passive component including a laminated dielectric filter that constitutes a resonance circuit in a microwave band of several hundred MHz to several GHz, and relates to a passive component that can effectively reduce the size of communication devices and electronic devices. .
[0002]
[Prior art]
Recently, ICs have been highly integrated, and miniaturization of ICs has been progressing rapidly. Along with this, passive components such as filters used around the IC are also being miniaturized. In order to reduce the size of passive components, a multilayer dielectric filter using a dielectric substrate is effective (see, for example, Patent Documents 1 and 2).
[0003]
[Patent Document 1]
JP 2002-280805 A (FIGS. 1 and 9)
[Patent Document 2]
Japanese Patent Laying-Open No. 2002-261634 (FIG. 1, paragraph [0021])
[0004]
[Problems to be solved by the invention]
By the way, one filter is used for each of the transmission side and the reception side. In the wireless LAN, a 2.4 GHz and 5 GHz dual system has been developed. In this case, at least four filters are used in total.
[0005]
In such a case, the space saving of the mounting area of the passive component has not caught up with the integration / miniaturization of the IC. This is because conventional multilayer dielectric filters and the like are becoming smaller in size, but in addition to input / output terminals for each passive component, a ground terminal is required, and strength is maintained at the time of mounting. This is because there is a limit to reducing the size of the terminal. Accordingly, the passive component terminal pitch is much larger than the IC terminal pitch.
[0006]
In addition, each passive component requires a fixed mounting area (usually about 1.5 times the projected area of the component), and there is a problem that the passive components cannot be integrated. Therefore, if the mounting area including the IC and passive components is narrowed to reduce the size of the communication device and the like, it is difficult to arrange and wire the IC and passive components. Arise.
[0007]
The present invention has been made in consideration of such problems, and can reduce the number of passive components mounted on an electronic device, a communication device, etc., and reduce the terminal pitch of the passive components, An object of the present invention is to provide a passive component that can reduce the number of terminals and save the space of the entire mounting area of the passive component.
[0008]
[Means for Solving the Problems]
  The passive component according to the present invention is configured by laminating a plurality of dielectric layers, and has at least two passive parts in a dielectric substrate on which a ground electrode is formed.Connected to a first terminal formed on the surface of the dielectric substrate;There is a non-equilibrium input / output type first filter section using a first electrode as a resonance electrode, and a strip line corresponding to the first filter section.And connected to a second terminal formed on the surface of the dielectric substrate.The first non-equilibrium-balance conversion unit is formed, and the other passive unit isConnected to a third terminal formed on the surface of the dielectric substrateThere is a second filter part of the unbalanced input / output system using the second electrode as a resonance electrode, and a strip line corresponding to the second filter part.And connected to a fourth terminal formed on the surface of the dielectric substrate.Formed by a second non-equilibrium-equilibrium converter, the first electrode and the second electrode are continuously formed by one electrode film, and the electrode film and the ground electrode are electrically connected by a via hole. The first electrode and the second electrode are made common, and the portion where the via hole of the first electrode and the second electrode is connected constitutes a common short-circuited end, The via hole is formed between the first unbalanced-balanced conversion unit and the second unbalanced-balanced conversion unit.
[0009]
As a result, a plurality of passive parts are formed and combined in one dielectric substrate, and the mounting area can be saved rather than mounting the plurality of passive parts individually. .
[0010]
  In addition, since a plurality of electrodes are shared in each passive part and / or between each passive part, the number of terminals derived from the multilayer dielectric filter can be effectively reduced. The pitch of can also be narrowedThe
[0011]
As described above, in the passive component according to the present invention, it is possible to reduce the number of passive elements mounted on an electronic device, a communication device, etc., and to reduce the pitch of the passive elements and reduce the number of terminals. In addition, space saving of the entire mounting area of the passive elements can be realized.
[0014]
  In the present invention,Each filter unit can be formed of a 1/4 wavelength resonator that is advantageous for miniaturization. By integrating, it is not necessary to set the characteristic impedance between the filter unit and the non-equilibrium-balance conversion unit to a specific value (for example, 50Ω), and the characteristic impedance between the two can be arbitrarily determined. The degree of freedom of design can be increased.
[0015]
In addition, since the characteristic impedance between the two can be set low, it is easy to form a filter part, and the line width of the strip line constituting the non-equilibrium-balance conversion part can be widened. There is an effect that the loss of the part can also be reduced.
[0016]
That is, in this configuration, it is possible to effectively reduce the size while realizing balanced input / output in consideration of the connection of a high-frequency amplifier circuit or the like.
[0017]
  Also, the via holeButFormed between the first unbalance-balance conversion section and the second unbalance-balance conversion section.BecauseIsolation between the first unbalanced-balanced conversion unit and the second unbalanced-balanced conversion unit combined in one dielectric substrate can be improved, and characteristics can be improved. .
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, several embodiments of the passive component according to the present invention will be described with reference to FIGS.
[0021]
First, as shown in FIG. 1, the passive component 10 </ b> A according to the first embodiment includes a plurality of dielectric layers (S <b> 1 to S <b> 7: see FIG. 2) that are stacked and baked and integrated, and both main surfaces ( A dielectric substrate 14 having inner layer ground electrodes 12a and 12b formed on one main surface of the second dielectric layer S2 and one main surface of the sixth dielectric layer S6 is provided.
[0022]
As shown in FIG. 2, the dielectric substrate 14 is configured by stacking a first dielectric layer S <b> 1 to a seventh dielectric layer S <b> 7 in order from the top. These first to seventh dielectric layers S1 to S7 are composed of one or a plurality of layers.
[0023]
In the dielectric substrate 14, as shown in FIG. 2, two passive parts (first and second passive parts 16A and 16B) are formed at symmetrical positions.
[0024]
The first passive unit 16A includes a first filter unit 18A that constitutes two quarter-wave resonators (a first input-side resonator and a first output-side resonator). As shown in FIG. 2, the filter portion 18A includes a first input-side resonance electrode 20 and a first output-side resonance electrode 22 formed on one main surface of the fourth dielectric layer S4.
[0025]
The second passive unit 16B includes a second filter unit 18B that constitutes two quarter-wave resonators (a second input-side resonator and a second output-side resonator). The filter portion 18B has a second input-side resonance electrode 24 and a second output-side resonance electrode 26 formed on one main surface of the fourth dielectric layer S4.
[0026]
The first input-side resonance electrode 20 in the first filter section 18A and the second input-side resonance electrode 24 in the second filter section 18B are continuously formed by one electrode film, and this electrode A central portion in the longitudinal direction of the film is electrically connected to inner layer ground electrodes 12a and 12b through via holes 28 and 30, respectively. That is, the short-circuit ends (via holes 28 and 30) of the first input-side resonance electrode 20 and the second input-side resonance electrode 24 are configured in common.
[0027]
The same applies to the first output-side resonance electrode 22 in the first filter portion 18A and the second output-side resonance electrode 26 in the second filter portion 18B, and each electrode 22 and 26 has one electrode film. Further, the central portion in the longitudinal direction of the electrode film is electrically connected to the inner ground electrodes 12a and 12b through the via holes 32 and 34, respectively. That is, also in this case, the short-circuit ends (via holes 32 and 34) of the first output-side resonance electrode 22 and the second output-side resonance electrode 26 are configured in common.
[0028]
Further, in this passive component 10A, as shown in FIG. 1, among the outer peripheral surfaces of the dielectric substrate 14, the side surface 14a of Ai 1 and the second side surface 14b facing the first side surface 14a are respectively A ground electrode 36 to which the inner layer ground electrodes 12a and 12b are connected is formed.
[0029]
A first unbalanced input terminal 38 and a second unbalanced input terminal 40 are formed on the third side surface 14 c of the dielectric substrate 14. As shown in FIG. 2, the first unbalanced input terminal 38 is electrically connected to the first input-side resonance electrode 20 via the lead electrode 42, and the second unbalanced input terminal 40 is connected to the lead electrode. The second input-side resonance electrode 24 is electrically connected via the 44.
[0030]
As shown in FIG. 1, a first unbalanced output terminal 46 and a second unbalanced output terminal 48 are formed on the fourth side face 14d facing the third side face 14c. As shown in FIG. 2, the first unbalanced output terminal 46 is electrically connected to the first output-side resonance electrode 22 via the lead electrode 50, and the second unbalanced output terminal 48 is connected to the lead electrode. The second output-side resonance electrode 26 is electrically connected to the second output-side resonance electrode 26.
[0031]
On the other hand, as shown in FIG. 2, on one main surface of the third dielectric layer S3, inner ground electrodes 54 and 56 facing the open ends of the first and second input-side resonance electrodes 20 and 24, The degree of coupling between the inner ground electrodes 58 and 60 facing the open ends of the first and second output-side resonance electrodes 22 and 26, and the first input-side resonator and the first output-side resonator is adjusted. And a coupling adjustment electrode 64 for adjusting the degree of coupling between the second input-side resonator and the second output-side resonator.
[0032]
One main surface of the fifth dielectric layer S5 includes inner layer ground electrodes 66 and 68 facing the open ends of the first and second input-side resonance electrodes 20 and 24, and the first and second output sides. Inner-layer ground electrodes 70 and 72 facing the open ends of the resonance electrodes 22 and 26, a coupling adjustment electrode 74 for adjusting the degree of coupling between the first input-side resonator and the first output-side resonator, A coupling adjustment electrode 76 for adjusting the degree of coupling between the second input-side resonator and the second output-side resonator is formed.
[0033]
That is, in the passive component 10A according to the first embodiment, the signal input to the first unbalanced input terminal 38 is transmitted through the first filter unit 18A in the first passive unit 16A. A signal output from the balanced output terminal 46 and input to the second unbalanced input terminal 40 is output from the second unbalanced output terminal 48 via the second filter unit 18B in the second passive unit 16B. It will be.
[0034]
Thus, in the passive component 10A according to the first embodiment, a plurality of passive portions 16A and 16B are formed in the dielectric substrate 14, and a common ground potential is applied to each passive portion 16A and 16B. A plurality of electrodes are shared.
[0035]
For example, eight inner layer ground electrodes 54, 58, 56, 60, 66, 70, 68, 72 formed for each resonance electrode 20, 22, 24 and 26 are connected in common and connected to the ground electrode 36, The short-circuit ends of the second input-side resonance electrodes 20 and 24 and the short-circuit ends of the first and second output-side resonance electrodes 22 and 26 are shared by the inner-layer ground electrodes 12a and 12b, respectively, and connected to the ground electrode 36. I am doing so.
[0036]
As a result, the first and second passive portions 16A and 16B are formed and combined in one dielectric substrate 14, and the first passive portion 16A and the second passive portion 16B are each independently provided. The mounting area can be reduced compared to mounting with.
[0037]
In addition, since a plurality of electrodes to which a common ground potential is applied are shared by the passive portions 16A and 16B, the number of terminals derived from the passive component 10A can be effectively reduced. The pitch between them can also be narrowed.
[0038]
Here, a pitch between terminals and a mounting area in the comparative example and the example will be described. The comparative example shows an example in which two passive components 80A and 80B are mounted side by side as shown in FIG. 3, and the example shows the passive component 10A according to the first embodiment described above as shown in FIG. An example of implementing is shown.
[0039]
As shown in FIG. 3, since the comparative example needs to consider the mounting areas Z1 and Z2 of the two passive components 80A and 80B, the pitch Pa between the terminals of the two passive components 80A and 80B, for example, passive The distance Pa between the output terminal 46 of the component 80A and the output terminal 48 of the passive component 80B must be set across the mounting areas Z1 and Z2 and the wiring area between the two passive components 80A and 80B. There are limits.
[0040]
Further, for example, the wiring derived from the ground electrode of the passive component 80A and the wiring derived from the ground electrode of the other passive component 80B need to be shared outside the mounting areas to be derived as the common wiring 81. Therefore, for example, the distance Pb between the wirings 81 shared with the passive component 80A is also increased.
[0041]
On the other hand, in the embodiment, as shown in FIG. 4, since the two passive portions 16A and 16B are combined in one dielectric substrate 14, the pitch Pc between the terminals is the mounting area of the passive component 10A. There is no need to consider Z3, and the pitch can be reduced as compared with the comparative example. Moreover, since one dielectric substrate 14 is mounted, the mounting area Z3 can also be reduced in space compared to the total mounting area (Z1 + Z2) of the comparative example.
[0042]
Further, as shown in FIG. 4, for example, only one wiring 83 derived from the ground electrode 36 is required, and therefore, for example, the distance Pd between the output terminal and the wiring 83 can be shortened.
[0043]
As described above, the passive component 10A according to the first embodiment can reduce the number of components of the passive component 10A mounted on an electronic device, a communication device, and the like, and can reduce the terminal pitch Pb of the passive component 10A. It is possible to realize pitch reduction, reduction of the number of terminals, and space saving of the entire mounting area Z3 of the passive component 10A.
[0044]
Next, a passive component 10B according to a second embodiment will be described with reference to FIGS. In addition, about the member corresponding to FIG.1 and FIG.2, the same code | symbol is attached | subjected and the duplication description is abbreviate | omitted.
[0045]
The passive component 10B according to the second embodiment has a dielectric substrate 14 as in the first embodiment described above. As shown in FIG. 6, the dielectric substrate 14 includes a plurality of dielectric layers (S1 to S12) stacked and baked and integrated to form both main surfaces (one main surface of the second dielectric layer S2 and the eleventh surface). Inner layer ground electrodes 12a and 12b are respectively formed on one main surface of the dielectric layer S11. Further, an inner layer DC electrode 82 connected to a DC power source is formed on one main surface of the tenth dielectric layer S10.
[0046]
The second embodiment is the same as the first embodiment in that the first and second passive portions 16A and 16B are formed in symmetrical positions in the dielectric substrate 14. The first passive unit 16A includes a first filter unit 18A, a first unbalance-balance conversion unit (hereinafter referred to as a first conversion unit 84A), the first filter unit 18A, and a first filter unit 18A. The point which has the 1st connection part 86A which connects the conversion part 84A, and the 2nd passive part 16B are the 2nd filter part 18B, and the 2nd unbalance-balance conversion part (henceforth a 2nd conversion part). 84B) and the second connecting portion 86B for connecting the second filter portion 18B and the second converting portion 84B. The first and second passive parts 16A and 16B are formed at symmetrical positions, respectively.
[0047]
Here, in order to make the description clearer, the first and second filter units 18A and 18B are described as a composite filter unit 88, and the first and second conversion units 84A and 84B are described as a composite conversion unit 90, The first and second connection portions 86A and 86B are referred to as a composite connection portion 92.
[0048]
The composite filter unit 88 and the composite conversion unit 90 are respectively formed on the dielectric substrate 14 in regions separated vertically in the stacking direction of the dielectric layers S1 to S12. For example, FIG. 6 shows an example in which the composite filter unit 88 is formed at the upper part in the stacking direction, the composite conversion unit 90 is formed at the lower part in the stacking direction, and the composite connection unit 92 is formed therebetween.
[0049]
That is, the composite filter unit 88 is formed in the third dielectric layer S3 and the fourth dielectric layer S4, the composite conversion unit 90 is formed in the seventh and eighth dielectric layers S7 and S8, and the fifth A composite connection portion 92 is formed in the dielectric layer S5.
[0050]
Further, an inner layer ground electrode 94 for the purpose of isolation between the composite filter unit 88 and the composite conversion unit 90 is formed in the dielectric substrate 14, and the isolation between the composite conversion unit 90 and the inner layer DC electrode 82 is isolated. The intended inner layer ground electrode 96 is formed.
[0051]
Further, in the passive component 10B, as shown in FIG. 5, the first unbalanced input terminal 38 and the second unbalanced input terminal 38 are arranged at the center of the third side surface 14b of the outer peripheral surface of the dielectric substrate 14. The DC terminal 98 is formed adjacent to the first unbalanced input terminal 38, and the ground electrode 36 is formed adjacent to the second unbalanced input terminal 40. ing. In addition, first balanced output terminals 100A and 100B and second balanced output terminals 102A and 102B are formed on the fourth side surface 14b.
[0052]
On the other hand, the first conversion portion 84A in the composite conversion portion 90 is formed on one main surface of the seventh dielectric layer S7 and one strip line 104 formed on the main surface of the seventh dielectric layer S7. Two strip lines 106 and 108. Similarly, the second converter 84B includes one strip line 110 formed on one main surface of the seventh dielectric layer S7 and two main surfaces formed on one main surface of the eighth dielectric layer S8. Strip lines 112 and 114.
[0053]
The strip line 104 in the first conversion portion 84A has a shape in which one end (starting end) 116 and the other end (terminal end) 118 are adjacent to each other and are formed in a substantially spiral shape from the starting end 116 toward the end 118. . The strip line 106 has a spiral shape from the starting end 120 toward one terminal 100A of the first balanced output terminal, and the strip line 108 extends from the starting end 122 to the other of the first balanced output terminals. It has a shape formed in a spiral toward the terminal 100B.
[0054]
Similarly, the strip line 110 in the second conversion unit 84B has a shape in which the start end 124 and the end end 126 are adjacent to each other and are formed in a substantially spiral shape from the start end 124 toward the end end 126. The strip line 112 has a spiral shape from the starting end 128 toward one terminal 102A of the second balanced output terminal, and the strip line 114 extends from the starting end 130 to the other of the second balanced output terminals. It has a shape formed in a spiral toward the terminal 102B.
[0055]
The first connecting portion 86A in the composite connecting portion 92 is formed on one main surface of the fifth dielectric layer S5, and the first output-side resonance electrode 22 and the fourth dielectric layer S4 are sandwiched therebetween. The second connection portion 86B has a second connection electrode 134 that overlaps with the second output-side resonance electrode 26 and the fourth dielectric layer S4 sandwiched therebetween. Have.
[0056]
Then, the start end 116 of the strip line 104 in the first converter 84A and the first connection electrode 132 are electrically connected via the via hole 136, and the start end 124 of the strip line 110 in the second converter 84B and the first end 124 are electrically connected. Two connection electrodes 134 are electrically connected through via holes 138. A region for insulating the via holes 136 and 138, that is, a region where no electrode film is formed, is secured on the inner layer ground electrode 94 formed on one main surface of the sixth dielectric layer S6.
[0057]
In addition, the first ends 120 and 122 of the strip lines 106 and 108 in the first converter 84A and the inner DC electrode 82 formed on the tenth dielectric layer S10 are electrically connected through via holes 140 and 142, respectively. In addition, the start ends 128 and 130 of the strip lines 112 and 114 in the second converter 84B and the inner layer DC electrode 82 are electrically connected via via holes 144 and 146, respectively. In the inner ground electrode 96 formed on one main surface of the ninth dielectric layer S9, a region for insulating from the via holes 140, 142, 144 and 146, that is, a region where no electrode film is formed is secured. ing.
[0058]
In addition, the via hole 30 extending downward from the common short-circuited end of the first input-side resonance electrode 20 and the second input-side resonance electrode 24, and the first output-side resonance electrode 22 and the second output-side resonance electrode 26 The via holes 34 extending downward from the common short-circuit end are formed so as to reach the inner layer ground electrode 96 formed on one main surface of the ninth dielectric layer S9.
[0059]
That is, in the passive component 10B according to the second embodiment, the signal input to the first unbalanced input terminal 38 is the first filter unit 18A and the first conversion unit 84A in the first passive unit 16A. The signals output from the first balanced output terminals 100A and 100B via the first and the second unbalanced input terminal 40 are input to the second filter unit 18B and the second conversion unit 84B in the second passive unit 16B. Are output from the second balanced output terminals 102A and 102B.
[0060]
Thus, in the passive component 10B according to the second embodiment, as in the first embodiment, for example, four inner-layer ground electrodes 54 formed for each of the resonance electrodes 20, 22, 24, and 26, respectively. , 58, 56, 60 are connected to the ground electrode 36, the short-circuit ends of the first and second input side resonance electrodes 20 and 24 are connected to the ground electrode 36, and the first and second The short-circuit ends of the output-side resonance electrodes 22 and 26 are shared and connected to the ground electrode 36.
[0061]
In addition, the start ends 120 and 122 of the strip lines 106 and 108 in the first conversion unit 84A and the start ends 128 and 130 of the strip lines 112 and 114 in the second conversion unit 84B are shared by the inner layer DC electrode 82, respectively. The DC terminal 98 is connected.
[0062]
As a result, the first and second filter portions 18A and 18B and the first and second conversion portions 84A and 84B are formed in one dielectric substrate 14, and are combined. The mounting area of the filter unit 18A, the second filter unit 18B, the first conversion unit 84A, and the second conversion unit 84B can be reduced as compared to mounting each of the filter unit 18A, the second filter unit 18B, the first conversion unit 84A and the second conversion unit 84B.
[0063]
In addition, a plurality of electrodes to which a common ground potential is applied are made common in the filter units 18A and 18B, and a plurality of electrodes to which a common DC potential is applied are made common to the conversion units 84A and 84B. Thus, the number of terminals derived from the passive component 10B can be effectively reduced, and the pitch between the terminals can be narrowed accordingly.
[0064]
In the second embodiment, the first passive unit 16A includes a first filter unit 18A of a non-balanced input / output system having a plurality of resonators and a first conversion unit having a plurality of strip lines. 84A, and the second passive unit 16B includes a second filter unit 18B of a non-balanced input / output system having a plurality of resonators and a second conversion unit 84B having a plurality of strip lines. I have to.
[0065]
As a result, the first and second filter portions 18A and 18B can be configured by a resonator having a quarter wavelength that is advantageous for downsizing. Moreover, by integrating, the characteristic impedance between the first filter unit 18A and the first conversion unit 84A and the characteristic impedance between the second filter unit 18B and the second conversion unit 84B are respectively set to specific values ( For example, the characteristic impedance between the two can be arbitrarily determined, so that the degree of freedom of design can be increased.
[0066]
Further, since the characteristic impedance between the two can be set low, the first and second filter portions 18A and 18B can be easily formed, and the strip lines constituting the first and second conversion portions 84A and 84B can be easily formed. Since the line width can be increased, the loss of the first and second converters 84A and 84B can be reduced.
[0067]
That is, in this configuration, it is possible to effectively reduce the size while realizing balanced input / output in consideration of the connection of a high-frequency amplifier circuit or the like.
[0068]
Also, a via hole 30 extending downward from a common short-circuited end of the first input-side resonance electrode 20 and the second input-side resonance electrode 24, a first output-side resonance electrode 22, and a second output-side resonance electrode 26 Since the via hole 34 extending downward from the common short-circuit end reaches the inner-layer ground electrode 96 formed in the lower layer of the composite conversion portion 90, the first and second conversion portions 84A are formed in these via holes 30 and 34. And 84B can be improved.
[0069]
For example, as a method of improving the isolation between the first and second conversion units 84A and 84B, as in the passive component 10Ba according to the modification shown in FIG. 7, the first and second conversion units 84A and 84B For example, a rectangular long hole 150 penetrating the seventh and eighth dielectric layers S7 and S8 is formed between the holes 84B, and an electric current is passed through the inner ground electrodes 94 and 96 and via holes 30 and 34 in the long hole 150. Alternatively, the electrically conductive layer 152 may be filled. Thereby, the isolation between the first and second conversion units 84A and 84B can be further improved. The long hole 150 may be filled with air.
[0070]
Next, a passive component 10C according to a third embodiment will be described with reference to FIG. Note that members corresponding to those in FIGS. 5 and 6 are denoted by the same reference numerals, and redundant description thereof is omitted.
[0071]
The passive component 10C according to the third embodiment has substantially the same configuration as the passive component 10B according to the second embodiment described above, but differs in that the second filter portion 18B does not exist.
[0072]
That is, in the passive component 10C, the signal input from the first unbalanced input terminal 38 (see FIG. 5) is passed through the first filter unit 18A and the first conversion unit 84A in the first passive unit 16A. A signal output from the first balanced output terminals 100A and 100B and input to the second unbalanced input terminal 40 is directly input to the second balanced output terminal via the second conversion unit 84B in the second passive unit 16A. 102A and 102B.
[0073]
Accordingly, as compared with the passive component 10B according to the second embodiment described above, the formation of the inner layer ground electrodes 56 and 60 (see FIG. 6) and the formation of the coupling adjustment electrode 64 on the third dielectric layer S3. Is omitted.
[0074]
Instead, a connection electrode 160 that electrically connects the second unbalanced input terminal 40 (see FIG. 5) and the second conversion unit 84B is formed on one main surface of the fifth dielectric layer S5. Thus, the signal from the second unbalanced input terminal 40 is balanced output from the second balanced output terminals 102A and 102B (see FIG. 5) via the second converter 84B.
[0075]
Also in the third embodiment, the first and second via holes 30 extending downward from the short-circuit end of the first input-side resonance electrode 20 and via holes 34 extending downward from the short-circuit end of the first output-side resonance electrode 22 The isolation between the second converters 84A and 84B can be improved.
[0076]
Of course, as shown in the passive component 10Ca according to the modification of FIG. 9, a long hole 150 is formed between the first and second conversion portions 84A and 84B, and the inner ground electrodes 94 and 96 are formed in the long hole 150. The conductor layer 152 electrically connected via the via holes 30 and 34 may be filled to further improve the isolation between the first and second conversion units 84A and 84B. The long hole 150 may be filled with air.
[0077]
As described above, in the passive component 10C according to the third embodiment and the passive component 10Ca according to the modification, the first passive portion 16A having the first filter portion 18A and the first conversion portion 84A, Since the second passive portion 16B having the second conversion portion 84B is formed and combined in one dielectric substrate 14, the mounting area of the passive components 10C and 10Ca can be saved. . In addition, the number of terminals derived from the passive components 10C and 10Ca can be effectively reduced, and the pitch between the terminals can be reduced.
[0078]
Next, a passive component 10D according to a fourth embodiment will be described with reference to FIG. Note that members corresponding to those in FIGS. 5 and 8 are denoted by the same reference numerals, and redundant description thereof is omitted.
[0079]
As shown in FIG. 10, the passive component 10 </ b> D according to the fourth embodiment has substantially the same configuration as the passive component 10 </ b> C according to the above-described third embodiment. It differs by not existing.
[0080]
That is, in the passive component 10D, the signal input to the first unbalanced input terminal 38 (see FIG. 5) is directly input to the first balanced output terminal via the first conversion unit 84A in the first passive unit 16A. The signals output from 100A and 100B (see FIG. 5) and input to the second unbalanced input terminal 40 are directly input to the second balanced output terminal 102A via the second conversion unit 84B in the second passive unit 16B. And 102B (see FIG. 5).
[0081]
Accordingly, as compared with the passive component 10C according to the third embodiment described above, the formation of the resonance electrodes 20 and 22 (see FIG. 8) on the fourth dielectric layer S4 and the third dielectric layer S3. The formation of the inner layer ground electrodes 54 and 58 and the formation of the coupling adjusting electrode 62 are omitted.
[0082]
Instead, a connection electrode 162 that electrically connects the first unbalanced input terminal 38 (see FIG. 5) and the first converter 84A to one main surface of the fourth dielectric layer S4, A connection electrode 164 that electrically connects the unbalanced input terminal 40 and the second conversion portion 84B is formed.
[0083]
In the fourth embodiment, long holes 150 and 166 are formed between the first and second conversion portions 84A and 84B and between the connection electrodes 162 and 164, respectively, and inner layers are formed in the long holes 150 and 166. A conductor layer 152 that is electrically connected to the ground electrodes 94 and 96 via the via holes 30 and 34 may be filled to improve isolation between the first and second conversion portions 84A and 84B. . Of course, the long holes 150 and 166 may be filled with an air layer.
[0084]
Thus, in the passive component 10D according to the fourth embodiment, the first passive unit 16A having the first conversion unit 84A and the second passive unit 16B having the second conversion unit 84B are one. Since the two dielectric substrates 14 are formed and combined, the mounting area of the passive component 10D can be saved. In addition, the number of terminals derived from the passive component 10D can be effectively reduced, and the pitch between the terminals can be narrowed.
[0085]
In the above-described embodiment, each of the first filter and the second filter has a structure having two resonators. However, each of the first filter and the second filter may have a structure having three or more resonators.
[0086]
Note that the passive component according to the present invention is not limited to the above-described embodiment, and can of course have various configurations without departing from the gist of the present invention.
[0087]
【The invention's effect】
As described above, according to the passive component according to the present invention, the number of passive components mounted on an electronic device, a communication device, or the like can be reduced, and the terminal pitch of the passive component can be reduced. It is possible to realize a reduction in the number and a space saving of the entire mounting area of the passive components.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a passive component according to a first embodiment.
FIG. 2 is an exploded perspective view showing a passive component according to the first embodiment.
FIG. 3 is an explanatory diagram showing a mounting state of a comparative example.
FIG. 4 is an explanatory diagram showing a mounting state of the embodiment.
FIG. 5 is a perspective view showing a passive component according to a second embodiment.
FIG. 6 is an exploded perspective view showing a passive component according to a second embodiment.
FIG. 7 is an exploded perspective view showing a modification of the passive component according to the second embodiment.
FIG. 8 is an exploded perspective view showing a passive component according to a third embodiment.
FIG. 9 is an exploded perspective view showing a modification of the passive component according to the third embodiment.
FIG. 10 is an exploded perspective view showing a passive component according to a fourth embodiment.
[Explanation of symbols]
10A, 10B, 10Ba, 10C, 10Ca, 10D ... passive components
12a, 12b, 94, 96 ... inner layer ground electrode
14 ... Dielectric substrate 16A ... First passive part
16B ... 2nd passive part 18A ... 1st filter part
18B ... 2nd filter part 20 ... 1st input side resonance electrode
22 ... 1st output side resonance electrode 24 ... 2nd input side resonance electrode
26: Second output-side resonance electrode 28, 30, 32, 34: Via hole
84A ... 1st conversion part 84B ... 2nd conversion part
86A ... 1st connection part 86B ... 2nd connection part
88 ... Composite filter section 90 ... Composite conversion section

Claims (1)

A dielectric substrate formed by laminating a plurality of dielectric layers and having a ground electrode formed therein, and having at least two passive parts;
One of the passive parts includes a first filter part of a non-equilibrium input / output method using a first electrode connected to a first terminal formed on the surface of the dielectric substrate as a resonance electrode, and the first filter part. have a corresponding strip line and the first non-equilibrium being connected to a second terminal formed on the dielectric surface of the substrate - is formed by the balance conversion section,
The other passive part includes a second filter part of a non-equilibrium input / output system using a second electrode connected to a third terminal formed on the surface of the dielectric substrate as a resonance electrode, and a second filter part. have a corresponding strip line and the second non-equilibrium connected to a fourth terminal formed on the dielectric surface of the substrate - is formed by the balance conversion section,
The first electrode and the second electrode are continuously formed with one electrode film,
The electrode film and the ground electrode are electrically connected via a via hole, whereby the first electrode and the second electrode are made common, and the via hole of the first electrode and the second electrode is The connected parts constitute a common short-circuit end,
The passive component according to claim 1, wherein the via hole is formed between the first unbalanced-balanced conversion unit and the second unbalanced-balanced conversion unit.

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