JP4063789B2 - Non-reciprocal circuit element - Google Patents

Description

  The present invention relates to an irreversible circuit element including an isolator and a circulator applied to a transmission unit of a mobile communication device such as a mobile phone.

  FIG. 4 is an exploded perspective view of a conventional non-reciprocal circuit element, FIG. 5 is a cross-sectional view of a main part of the conventional non-reciprocal circuit element, and FIG. The configuration of the reversible circuit element will be described with reference to FIGS. 4 and 5. A magnet 52 is housed in a first yoke 51 formed of a box-shaped magnetic plate (iron plate or the like).

The second yoke 53 made of a magnetic plate (iron plate or the like) has a U shape and is coupled to the first yoke 51 to form a magnetic closed circuit.
A resin case 54 made of a synthetic resin molded product has a through hole 54a provided at the center and a plurality of recesses 54b provided on the outer periphery of the through hole 54a. 53.

The flat ferrite member 55 is disposed in the through hole 54a of the resin case 54, and the chip-type capacitor 56 and the resistor 57 are disposed in the recess 54b.
The flat substrate member 58 is provided on the entire surface of the insulating substrate 59 so as to cover the insulating substrate 59, the central conductors 60a and 60b provided on both surfaces of the insulating substrate 59, and the central conductors 60a and 60b. Resist films 61a and 61b.

  Such a substrate member 58 is attached to the resin case 54 and disposed between the magnet 52 and the ferrite member 55. (For example, see Patent Document 1)

  However, since the conventional non-reciprocal circuit element is disposed on the resist film 61a in a state where the magnet 52 is housed in the first yoke 51, the vertical position of the magnet 52 can be made constant. However, the lateral position of the magnet 52 cannot be made constant, and therefore the lateral position between the magnet 52 and the central conductors 60a and 60b varies, resulting in variations in performance.

JP 2001-185912 A

  Since the conventional non-reciprocal circuit element is disposed on the resist film 61a with the magnet 52 housed in the first yoke 51, the vertical position of the magnet 52 can be made constant. The lateral position of the magnet 52 cannot be made constant, and thus there is a problem that the lateral position between the magnet 52 and the central conductors 60a and 60b varies and the performance varies.

  Accordingly, an object of the present invention is to provide a nonreciprocal circuit device having a stable magnet position and good performance.

As a first means for solving the above problems, a first yoke having an upper plate, a second yoke having a flat bottom plate and constituting a magnetic closed circuit with the first yoke, a magnet disposed on the upper side, the bottom plate side arranged plate-shaped ferrite member, the disposed between the magnet and the ferrite member Rutotomoni, with integrated board-like block body And a first, second, and third central conductors disposed so as to partially cross in the vertical direction via a dielectric, and a resist layer is provided on the upper surface of the block body. The block body and the magnet are bonded with an adhesive across the resist layer, and the third central conductor is exposed on the upper surface of the block body, and the resist layer is a configuration which is formed to avoid a third central conductor .

As a second solution, the resist layer is formed to be thicker than the third central conductor, and the third central conductor and the magnet are bonded by the adhesive.
As a third solution, the resist layer is provided with a concave portion for fastening the adhesive.
As a fourth solution, the lower surface of the magnet is in contact with the resist layer.

  The non-reciprocal circuit device of the present invention includes a first yoke having an upper plate, a second bottom plate having a flat bottom plate, and forming a magnetic closed circuit with the first yoke, and disposed on the upper plate side. The first magnet is disposed between the magnet, the flat ferrite member disposed on the bottom plate side, the magnet and the ferrite member, and partly intersects in the vertical direction via the dielectric. , Second and third center conductors, and the dielectric and the center conductor are integrated to form a substrate-like block body, and the magnet is adhered to the upper surface of the block body by an adhesive. The position in the vertical and horizontal directions can be made stable and constant, and a product with good performance can be obtained.

  In addition, a resist layer is provided on the top surface of the block body, and the block body and the magnet are bonded with an adhesive across the resist layer, so that the adhesive is spaced between the magnet and the top surface of the block body. In addition to ensuring the adhesion, the gap between the magnet and the upper surface of the block body can be made constant, so that the magnet can be attached with high accuracy.

  In addition, since the resist layer is provided with a concave portion for holding the adhesive, it is possible to prevent the adhesive from flowing out, to improve its appearance, and to securely bond the magnet.

  Further, since the lower surface of the magnet is in contact with the resist layer, the magnet is fixed in the vertical direction and can be arranged in parallel with the block body by the resist layer, so that a good performance can be obtained.

  In addition, since the third central conductor is exposed on the upper surface of the block body and the resist layer is formed to avoid the third central conductor, the thickness of the resist layer is constant and the magnet is stable. Can be placed.

  In addition, since the resist layer is formed thicker than the third central conductor, and the third central conductor and the magnet are bonded with an adhesive, the magnet can be securely bonded and the vibration of the magnet can be reduced. Can be obtained.

  The non-reciprocal circuit device of the present invention will be described below. FIG. 1 is a cross-sectional view of the main part of the non-reciprocal circuit device of the present invention, FIG. It is a disassembled perspective view of the magnet and block body which concern on the nonreciprocal circuit element of this invention.

  Next, the configuration of the nonreciprocal circuit device of the present invention will be described with reference to FIGS. 1 to 3. The first yoke 1 made of a magnetic plate (iron plate or the like) has a box shape or a U shape, and has a square shape. An upper plate 1a having a shape and a side plate 1b bent downward from a side of the upper plate 1a are provided.

  The box-shaped member 2 formed by molding processing includes a U-shaped second yoke 3 made of a magnetic plate (iron plate or the like), a terminal 4 formed by being separated from the second yoke 3, and this An insulating resin body 5 that couples the terminal 4 and the second yoke 3 is formed.

  The second yoke 3 has a flat bottom plate 3a and a side plate (not shown) bent upward from the bottom plate 3a, and the terminal 4 has a bottom portion 4a flush with the bottom plate 3a, The second yoke 3 and the terminal 4 are integrated by an insulating resin body 5 and the second yoke 3 of the box-shaped member 2 is connected to the connecting portion 4b bent upward from the bottom portion 4a. As a result, the first and second yokes 1 and 3 form a magnetic closed circuit.

The ground plate 6 made of a metal material has a flat plate portion 6a and a plurality of bent pieces 6b bent upward from the flat plate portion, and the ground plate 6 is positioned in the box-shaped member 2, The flat plate portion 6a is placed on the bottom plate 3a.
A plate-like ferrite member 7 made of YIG (Yttrium iron garnet) or the like is placed on the flat plate portion 6 a of the ground plate 6 in a state of being located in the box-shaped member 2.

  The block body 8 that is flat and has a substrate shape has a dielectric 9 and first, second, and third central conductors 10 and 11 with the dielectric 94 partially crossed in the vertical direction. 12 and the dielectric 9 and the first, second and third central conductors 10, 11 and 12 are integrated into one block to form a block body 9.

  For example, the block body 8 includes the first, second, and third central conductors 10, 11, 12 on the lower surface of the dielectric material 9, in the stack of the dielectric materials 9, and on the upper surface of the dielectric material 9. The dielectric 9 and the first and first layers are formed on the upper surface of an insulating substrate (not shown) made of a thin film technology or thick film technology such as printing or coating, or made of low temperature fired ceramic (LTCC) or resin. The second and third central conductors 10, 11, and 12 are formed by a thin film technique such as vapor deposition or sputtering, or a thick film technique such as printing or coating.

  The first, second, and third center conductors 10, 11, and 12 include port portions 10a, 11a, and 12a located on one end side, ground portions 10b, 11b, and 12b located on the other end side, and ports Each of the parts 10 a, 11 a, and 12 a is connected to each other and has a lead-out part 13 provided on the lower surface from the side surface of the dielectric 9.

  The third central conductor 12 is exposed on the upper surface of the dielectric 9 (block body 8), and the dielectric 9 is connected to the ground portion 10b of the first, second, and third central conductors 10, 11, and 12. 11b and 12b are provided with through holes (through holes) 9a, and the block body 8 having such a configuration is placed on the ferrite member 7 and is not shown here. The 10b, 11b, and 12b sides are connected to the ground plate 6 and are grounded.

  The plurality of chip type capacitors C includes a dielectric substrate 14 and first and second electrodes 15 a and 15 b provided on the upper and lower surfaces of the dielectric substrate 14. It arrange | positions between the piece 6b and the ferrite member 7, the 1st electrode 15a is connected to the extraction | drawer part 13, and the 2nd electrode 15b is connected to the bending piece 6b, and is earth | grounded.

  Although not shown here, on the port portion 12a side of the third central conductor 12, a capacitor C is connected to the circulator, and a capacitor C and a resistor (not shown) are connected to the isolator. One electrode of the container is grounded, and at least the port portions 10a, 11a of the first and second center conductors 10, 11 are connected to the connection portion 4b of the terminal 4 by soldering 19 Yes.

On the upper surface of the block 8 (dielectric 9), a resist layer 16 such as a solder resist made of an insulating resin is formed in a state where the third central conductor 12 is avoided.
The resist layer 16 is thicker than the third central conductor 12, and the first and second resist bodies 16a and 16b formed opposite to each other with the third central conductor 12 therebetween. The first and second resist bodies 16a and 16b have reservoirs 16c and 16d made of concave portions.

  The magnet 17 is bonded to the block body 8 and the third central conductor 12 by an adhesive 18 with the lower surface placed on the upper surface of the resist layer 16 (first and second resist bodies 16a and 16b). Has been.

As shown in FIG. 3, the magnet 17 is attached by applying an adhesive 18 to the central portion of the reservoirs 16c and 16d including the third central conductor 12, and in this state, the block body 8 and the magnet In a state where 17 is positioned by the jig, the magnet 17 is pressed onto the block body 8 by the jig, and the magnet 17 is bonded.
At this time, the adhesive 18 is pushed and spread by the magnet 17, but the peripheral portions of the concave portions 16 c and 16 d serve to prevent the adhesive 18 from flowing out, and the adhesive 18 to the outside of the lower surface of the magnet 17 is used. Is prevented from leaking.

  The nonreciprocal circuit device of the present invention includes a ground plate 6 positioned on the bottom plate 3a, a ferrite member 7 positioned on the ground plate 6, a block body 8 positioned on the ferrite member 7, and the block body 8 An upper magnet 17 is sandwiched between the upper plate 1a of the first yoke 1 and the bottom plate 3a of the second yoke 3 to form an isolator or circulator which is a nonreciprocal circuit element. .

The principal part sectional drawing of the nonreciprocal circuit device of this invention. The top view of the block body which concerns on the nonreciprocal circuit device of this invention. The disassembled perspective view of the magnet and block body which concern on the nonreciprocal circuit element of this invention. The disassembled perspective view which concerns on the conventional nonreciprocal circuit element. Sectional drawing of the principal part which concerns on the conventional nonreciprocal circuit element.

Explanation of symbols

1: First yoke 1a: Upper plate 1b: Side plate 2: Box-shaped member 3: Second yoke 3a: Bottom plate 4: Terminal 4a: Bottom portion 4b: Connection portion 5: Insulating resin body 6: Ground plate 6a: Flat plate portion 6b: Folded piece 7: Ferrite member 8: Block body 9: Dielectric 9a: Through hole 10: First center conductor 10a: Port portion 10b: Ground portion 11: Second center conductor 11a: Port portion 11b: Ground Part 12: Third central conductor 12a: Port part 12b: Ground part 13: Lead part C: Capacitor 14: Dielectric substrate 15a: First electrode 15b: Second electrode 16: Resist layer 16a: First resist body 16b: Second resist body 16c, 16d: Reservoir 17: Magnet 18: Adhesive 19: Solder

Claims (4)

A first yoke having an upper plate, a second yoke having a flat bottom plate and constituting a magnetic closed circuit with the first yoke, a magnet disposed on the upper plate side, and the bottom plate a flat ferrite member disposed in the side, is arranged between the magnet and the ferrite member Rutotomoni, it consists of integrated board-like block body, a portion in the vertical direction via the dielectric Are arranged so as to cross each other , a resist layer is provided on the upper surface of the block body, and between the block body and the magnet, Adhering with an adhesive across a resist layer, the third central conductor is exposed on the upper surface of the block body, and the resist layer is formed avoiding the third central conductor Non-reciprocal circuit device characterized. 2. The nonreciprocal circuit device according to claim 1, wherein the resist layer is formed to be thicker than the third central conductor, and the third central conductor and the magnet are bonded together by the adhesive. The nonreciprocal circuit device according to claim 1, wherein the resist layer is provided with a concave portion for fastening the adhesive. Wherein the resist layer, the non-reciprocal circuit device according to any one of claims 1 to 3, characterized in that the lower surface of the magnet was made to abut.

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