JP7557177B2 - Composite antenna device for built-in unit - Google Patents

Description

The present invention relates to a composite antenna device for incorporation into a unit, and in particular to a composite antenna device for incorporation into a unit, such as a communication device unit mounted on a vehicle, that is compatible with multiple frequency bands.

Telematics is known as a service that provides information to moving objects such as vehicles using a mobile communication network. Telematics is used, for example, for automatic emergency reporting when an airbag is activated, tracking functions when a vehicle is stolen, and traffic information distribution. To use telematics services, a vehicle needs to be equipped with a communication device unit and an antenna unit. The communication device unit is used to transmit and receive signals and control wireless communications between the vehicle and the cloud, between vehicles, and between the vehicle and the passenger's mobile terminal. The antenna unit has antenna elements that support various frequency bands, such as a TEL antenna, a wireless LAN antenna, and a Bluetooth (registered trademark) antenna, in order to perform such various wireless communications. These communication devices and antenna units are connected by a coaxial cable and are placed, for example, in the dashboard of the vehicle. In some cases, only the antenna unit is placed in the roof of the vehicle.

An antenna unit has multiple antenna elements arranged therein that correspond to various frequency bands, but problems with sensitivity and directivity may occur due to interference between the multiple antenna elements. For example, Patent Document 1 discloses a device that utilizes the entire volume within an antenna unit to reduce the effects of interference between antenna elements when arranging multiple antenna elements.

In recent years, multiple antenna elements are becoming necessary, such as in MIMO to realize not only 4th generation mobile communication networks but also 5th generation mobile communication networks. Furthermore, there is an increasing demand for lighter vehicles to improve fuel efficiency, and there is a demand for smaller communication equipment units and antenna units.

JP 2009-33571 A

When aiming to make communication devices and antenna units for using telematics services smaller and lighter, incorporating an antenna element into the communication device unit is one option. However, while it is possible to reduce the effects of interference between antenna elements if the entire volume within the antenna unit can be utilized, as in Patent Document 1, for example, when incorporating an antenna element into a unit such as a communication device unit, the antenna element must be efficiently positioned in a limited space, and the effects of interference between antenna elements in the limited space within the unit must be considered.

Until now, there has been no technology that takes into account the effects of interference between multiple antenna elements built into such a unit.

In view of the above situation, the present invention aims to provide a composite antenna device for incorporation into a unit that reduces the effects of interference between antenna elements and enables optimal impedance matching even when incorporated into a unit.

In order to achieve the above-mentioned object of the present invention, the composite antenna device for incorporation into a unit according to the present invention comprises: a first power supply section arranged near an edge of the circuit board of the unit; a second power supply section arranged near an edge of the circuit board of the unit at a position different from the first power supply section; a TEL antenna connected to the first power supply section, the TEL antenna being a monopole antenna element erected perpendicular to the circuit board of the unit and having an open end extending along the edge vicinity of the circuit board at least toward the second power supply section; and a multiple-resonance antenna connected to the second power supply section and having a plurality of elements of different frequency bands, the multiple-resonance antenna being erected perpendicular to the circuit board of the unit and having the elements of different frequency bands arranged along the edge vicinity of the circuit board from the side closer to the TEL antenna to the side farther from the side closer to the TEL antenna in descending order of frequency band.

Here, the TEL antenna may be made of a conductive plate and have a tapered tip shape that tapers toward the open end.

The TEL antenna may also have a tapered tip shape that tapers in the opposite direction from the second power supply section along the edge of the circuit board near the first power supply section when viewed from above.

The TEL antenna may be one that places the monopole antenna element close to the ground of the circuit board with a specified length and gap between them.

The TEL antenna may also be constructed of an inverted L-type element or an inverted F-type element whose top is bent parallel to the unit's circuit board.

The TEL antenna may also have a low band element connected to the top for a lower frequency band than the monopole antenna element.

The multiple resonance antenna may be a wireless LAN antenna having a 2.4 GHz band element and a 5 GHz band element.

The multiple resonance antenna may also be constructed with an inverted L-type element or an inverted F-type element whose top is bent perpendicular to the TEL antenna and parallel to the unit's circuit board.

The unit-embedded composite antenna device of the present invention may also be configured as a MIMO system using multiple sets of the first feed section, the second feed section, the TEL antenna, and the multiple resonance antenna.

The advantage of the inventive composite antenna device with built-in unit is that it reduces the effects of interference between antenna elements and enables optimal impedance matching.

FIG. 1 is a schematic perspective view for explaining an overall image of a composite antenna device for a unit according to the present invention. FIG. 2 is a schematic side view for explaining the positional relationship between the TEL antenna and the multiple resonance antenna of the unit-use composite antenna device of the present invention. FIG. 3 is a graph showing the VSWR characteristics of the composite antenna device for a unit according to the present invention. FIG. 4 shows the VSWR characteristics of a further comparative example. FIG. 5 shows the VSWR characteristics of a further comparative example. FIG. 6 is a schematic perspective view for explaining another example of the configuration of the TEL antenna or the multiple resonance antenna of the unit-use composite antenna device of the present invention. FIG. 7 is a schematic perspective view for explaining still another example of the configuration of the TEL antenna or the multiple resonance antenna of the unit-use composite antenna device of the present invention. FIG. 8 is a schematic perspective view for explaining an example in which the unit-use composite antenna device of the present invention is configured as a MIMO.

The following describes the embodiment of the present invention with examples. FIG. 1 is a schematic perspective view for explaining the overall image of the composite antenna device for a unit of the present invention. As shown in the figure, the composite antenna device for a unit of the present invention is mainly composed of a first power supply section 10, a second power supply section 20, a TEL antenna 30, and a multiple resonance antenna 40. Here, the unit 1 is, for example, a communication device unit, and has a circuit board 2 and a communication circuit section 3 mounted on the circuit board 2. In the illustrated example, the unit 1 is shown as a unit in which the communication circuit section 3 is mounted on the square circuit board 2 together with various connectors, etc., and is housed in a cubic case. Such a unit 1 is placed, for example, in the dashboard of a vehicle. The composite antenna device for a unit of the present invention allows various antennas to be placed in the limited space within such a unit 1.

The first power supply section 10 is disposed near the edge of the circuit board 2 of the unit 1. In other words, the free space at the edge of the circuit board 2 of the unit 1 is also used as a circuit board for an antenna. The first power supply section 10 is a power supply section for a TEL antenna, which will be described later. In the illustrated example, the first power supply section 10 is disposed near the edge of the short side of the circuit board 2. However, the present invention is not limited to this, and the first power supply section 10 may be disposed near the edge of the long side. The frequency band used for TEL requires a wide band from the low frequency range, so it is preferable that the ground of the circuit board 2 is as large as possible.

The second power supply section 20 is disposed at a position different from the first power supply section 10 on the circuit board 2 of the unit 1. The second power supply section 20 is a power supply section for the multiple resonant antenna 40 described below. The second power supply section 20 may be disposed, for example, near the end of the same side of the circuit board on which the first power supply section 10 is disposed. In the illustrated example, the second power supply section 20 is disposed near the end of the short side of the circuit board 2. However, the present invention is not limited to this, and the second power supply section 20 may be disposed near the end of the long side.

The TEL antenna 30 is connected to the first power supply unit 10. The TEL antenna 30 is made of a monopole antenna element. Specifically, the TEL antenna 30 may be an antenna compatible with, for example, Sub6 (a frequency band of 6 GHz or less) of the fifth generation mobile communication network. The TEL antenna 30 is erected at a right angle on the circuit board 2 of the unit 1. The open end of the monopole antenna element of the TEL antenna 30 in the illustrated example has a portion that extends toward the second power supply unit 20 along the vicinity of the edge of the circuit board 2 when viewed from above. That is, the TEL antenna 30 is, for example, an inverted L-shaped element that is erected at a right angle on the circuit board 2 and then bent 90 degrees to be parallel to the circuit board 2, and the portion that is parallel to the circuit board 2 extends toward the second power supply unit 20 parallel to the edge of the circuit board 2.

The multiple resonance antenna 40 is connected to the second power supply unit 20. The multiple resonance antenna 40 is, for example, a monopole antenna element, and has a plurality of elements of different frequency bands. Specifically, the multiple resonance antenna 40 has elements that can support various frequency bands, such as a 2.4 GHz band and 5 GHz band wireless LAN antenna, a Bluetooth (registered trademark) antenna, and an antenna for keyless entry. The second power supply unit 20 serves as a common power supply unit for these elements of different frequency bands. The multiple resonance antenna 40 is erected at a right angle on the circuit board 2 of the unit 1. The elements of the multiple resonance antenna 40 of different frequency bands are arranged in descending order of frequency band from the side closer to the TEL antenna 30 to the side farther from the TEL antenna 30 along the vicinity of the edge of the circuit board 2 in a top view. That is, for example, the 5 GHz band wireless LAN antenna is arranged closer to the TEL antenna 30 than the 2.4 GHz band wireless LAN antenna.

The details of the arrangement of the TEL antenna 30 and the multiple resonance antenna 40 will be described using FIG. 2. FIG. 2 is a schematic side view for explaining the arrangement relationship of the TEL antenna and the multiple resonance antenna of the composite antenna device for a unit of the present invention, and FIG. 2(a)-FIG. 2(c) are modified examples of the TEL antenna. In the figure, parts with the same reference numerals as in FIG. 1 represent the same objects. In the illustrated example, the TEL antenna 30 is shown as a monopole antenna element made of a conductive plate-like body and having a tapered tip shape toward the open end. This functions as a bowtie antenna. In the case where it is difficult to secure a band or adjust impedance in the limited space within the unit with a linear element such as that shown in FIG. 1, the TEL antenna can be made into a plate-like body to broaden the band, or impedance matching can be performed as described in detail below, making it possible to optimally arrange it within the limited space.

In the example shown in FIG. 2(a), the TEL antenna 30 has a tip shape with its top parallel to the circuit board 2, its right end on the drawing perpendicular to the circuit board 2, and tapered toward the left. The TEL antenna 30 has a monopole antenna element and the ground of the circuit board 2 in close proximity with a predetermined length and gap. Specifically, the TEL antenna 30 is configured so that the first power supply 10 is positioned approximately in the center of the position where the TEL antenna 30 is close to the ground of the circuit board 2 with a predetermined length and gap. By intentionally coupling the TEL antenna 30 and the ground of the circuit board 2, it is possible to match the impedance of the TEL antenna 30. In other words, impedance matching is achieved by adjusting the predetermined length and gap at the position where the TEL antenna 30 is close to the circuit board 2.

2(b), the TEL antenna 30 has a low band element 33. In order to make the TEL antenna 30 a multiband antenna that corresponds to a frequency band lower than the resonant band of a monopole antenna having a tapered tip shape toward the open end of the TEL antenna 30, for example, a frequency band of 1452 MHz to 5000 MHz, the low band element 33 is added to the monopole antenna element that constitutes the TEL antenna 30. The low band element 33 corresponds to a frequency band of 699 MHz to 960 MHz, specifically. The low band element 33 shown in FIG. 2(b) is connected to the top 31 on the side farther from the multiple resonance antenna 40. Then, it extends from the top 31 side farther from the multiple resonance antenna 40 toward the multiple resonance antenna 40 side. In addition, the low band element 33 may be bent toward the multiple resonance antenna 40 side and then the tip may be folded back in order to ensure the required element length. In addition, in the illustrated example, the low band element 33 extends toward the multiple resonance antenna 40, but the present invention is not limited to this. For example, the connection position of the low band element 33 may be connected to the top of the multiple resonance antenna 40. Furthermore, the open end of the low band element 33 may extend in a direction along the other edge of the circuit board 2. In this way, the placement position can be adjusted appropriately depending on the placement position and space of the communication circuit section 3 in the unit 1.

Furthermore, in the example shown in FIG. 2(c), the TEL antenna 30 has a pointed shape that tapers in the opposite direction to the second power supply 20 along the vicinity of the edge of the circuit board 2 from the first power supply 10 when viewed from above. In other words, the TEL antenna is a monopole antenna element whose open end has a pointed shape not only in the direction of the second power supply 20 along the vicinity of the edge of the circuit board 2 when viewed from above, but also in the opposite direction to the second power supply. Impedance matching is possible by appropriately adjusting the shape of the monopole antenna element of the TEL antenna 30 according to the space within the unit 1.

In addition, in each of the multiple resonance antennas 40 shown in FIG. 2(a)-FIG. 2(c), the frequency bands are arranged in ascending order from the side closer to the TEL antenna 30 to the side farther from the side closer to the TEL antenna 30 along the vicinity of the edge of the circuit board 2 in top view. The multiple resonance antenna 40 is, for example, a wireless LAN antenna having a 2.4 GHz band element 41 and a 5 GHz band element 42. The wireless LAN antenna in the illustrated example is also made of a conductive plate-like body, and the 2.4 GHz band element 41 is formed in an I-shape, and the 5 GHz band element 42 is formed in an L-shape. The 5 GHz band element 42 branches off from the middle of the 2.4 GHz band element 41 and extends. As shown in the figure, the 2.4 GHz band element 41 and the 5 GHz band element 42 of the multiple resonance antenna 40 are arranged in descending order from the side closer to the TEL antenna 30 to the side farther from the side closer to the TEL antenna 30 along the vicinity of the edge of the circuit board 2 in descending order of frequency. That is, the 5 GHz band element 42 is arranged closer to the TEL antenna 30. By arranging them in this way, the effects of interference between the TEL antenna 30 and the multiple resonance antenna 40 can be reduced, enabling optimal impedance matching.

The effect of the composite antenna device for units of the present invention will be described below with reference to FIG. 3. FIG. 3 is a VSWR characteristic graph of the composite antenna device for units of the present invention. In the figure, the solid black line is the characteristic of the TEL antenna of the composite antenna device for units of the present invention, and the solid gray line is the characteristic of the multiple resonance antenna of the composite antenna device for units of the present invention. The TEL antenna used had a low band element connected to the top on the side farther from the multiple resonance antenna. In addition, the multiple resonance antenna used was specifically a wireless LAN antenna with a 2.4 GHz band element and a 5 GHz band element. As Comparative Example 1, the VSWR characteristic when the 5 GHz band element of the multiple resonance antenna is arranged on the side farther from the TEL antenna is shown by a dotted line. The dotted black line is the characteristic of the TEL antenna of Comparative Example 1, and the dotted gray line is the characteristic of the multiple resonance antenna of Comparative Example 1.

As shown in Figure 3, it can be seen that the composite antenna device for a unit of the present invention has lower VSWR characteristics and optimal impedance matching in the vicinity of the 5 GHz band of the multiple resonance antenna compared to Comparative Example 1. In addition, although not shown, it was found that the composite antenna device for a unit of the present invention has an isolation of 20 dB or more in the vicinity of the 5 GHz band.

Next, for further comparison, FIG. 4 shows the VSWR characteristics when a TEL antenna having a low band element connected to the top on the side closer to the multiple resonance antenna is used. FIG. 4 shows the VSWR characteristics when the low band element of the TEL antenna is connected to the top on the side closer to the multiple resonance antenna. In the figure, the solid line shows the VSWR characteristics when the 5 GHz band element of the multiple resonance antenna of the unit composite antenna device of the present invention is arranged on the side farther from the TEL antenna. The solid black line is the characteristic of the TEL antenna of the unit composite antenna device of the present invention, and the solid gray line is the characteristic of the multiple resonance antenna of the unit composite antenna device of the present invention. In addition, as Comparative Example 2, the characteristic when the 5 GHz band element of the multiple resonance antenna is arranged on the side closer to the TEL antenna is shown by the dotted line. The dotted black line is the characteristic of the TEL antenna of Comparative Example 3, and the dotted gray line is the characteristic of the multiple resonance antenna of Comparative Example 3.

As can be seen by referring to Figure 4, even if the connection position of the low band element is connected to the top side closer to the multiple resonance antenna, the configuration of the unit composite antenna device of the present invention in which the multiple resonance antennas are arranged in order of increasing frequency band from the side closer to the TEL antenna to the side farthest from the TEL antenna has good VSWR characteristics for both the TEL antenna and the multiple resonance antenna.

For further comparison, FIG. 5 shows the VSWR characteristics when the positions of the TEL antenna and the multiple resonance antenna are swapped. FIG. 5 shows the VSWR characteristics when the positions of the TEL antenna and the multiple resonance antenna are swapped and the multiple resonance antenna is placed on the opposite side to the open end of the TEL antenna. That is, the multiple resonance antenna is placed on the side perpendicular to the circuit board opposite to the tip shape of the TEL antenna. Also, the low band element is connected to the top on the side farther from the multiple resonance antenna. As Comparative Example 3, the VSWR characteristics when the 5 GHz band element of the multiple resonance antenna is placed on the side farther from the TEL antenna are shown with a solid line. The solid black line is the characteristic of the TEL antenna of Comparative Example 3, and the solid gray line is the characteristic of the multiple resonance antenna of Comparative Example 3. Also, as Comparative Example 4, the characteristics when the 5 GHz band element of the multiple resonance antenna is placed on the side closer to the TEL antenna are shown with a dotted line. The dotted black line is the characteristic of the TEL antenna of Comparative Example 4, and the dotted gray line is the characteristic of the multiple resonance antenna of Comparative Example 4.

As can be seen by looking at Figure 5, when the multiple resonance antenna is placed on the opposite side to the open end of the TEL antenna, the VSWR characteristics of the TEL antenna have a narrower relative bandwidth compared to the examples of the present invention in Figures 3 and 4, and it is no longer possible to fully secure the 1400 MHz band. Note that when the TEL antenna has a tip shape that tapers to the left and right as shown in Figure 2 (c), the multiple resonance antenna may be placed on either side of the TEL antenna. However, even in this case, it is preferable to place the higher frequency band side of the multiple resonance antenna on the TEL antenna side.

Next, other configuration examples of the TEL antenna and the multiple resonance antenna of the unit composite antenna device of the present invention will be described. FIG. 6 is a schematic perspective view for explaining other configuration examples of the TEL antenna and the multiple resonance antenna of the unit composite antenna device of the present invention. In the figure, parts with the same reference numerals as in FIG. 1 represent the same objects. In the illustrated example, the communication circuit section is omitted, and a part of the circuit board 2, the TEL antenna 30, and the multiple resonance antenna 40 are shown. First, the TEL antenna 30 has a low band element 33. The low band element 33 is connected to the top 31 on the side farther from the multiple resonance antenna 40 and extends toward the multiple resonance antenna 40 side. Furthermore, the top 31 including the low band element 33 is made of an inverted L-type element that is bent parallel to the circuit board 2 of the unit 1. By bending the top 31 of the TEL antenna 30, it is possible to reduce the height. The TEL antenna may be configured as an inverted F-type element further provided with a short-circuit section.

Also, as shown in the figure, the multiple resonance antenna 40 may be an inverted L-type element with the top 43 bent perpendicularly to the TEL antenna 30 and parallel to the circuit board 2 of the unit 1. That is, the open end side of the low-frequency band element (2.4 GHz element 41) of the multiple resonance antenna 40 is bent 90 degrees perpendicularly to the TEL antenna 30. This allows the multiple resonance antenna 40 to be made low-profile, just like the TEL antenna 30. In the illustrated example, the low-frequency band element (2.4 GHz band element 41) is bent to be an inverted L-type element because it has a longer element length, but the present invention is not limited to this, and the high-frequency band element (5 GHz band element 42) may also be configured as an inverted L-type element if necessary. Also, the multiple resonance antenna 40 may be configured as an inverted F-type element with a short circuit if necessary.

Furthermore, using FIG. 7, further another configuration example of the TEL antenna and the multiple resonance antenna of the unit composite antenna device of the present invention will be described. FIG. 7 is a schematic perspective view for explaining further another configuration example of the TEL antenna and the multiple resonance antenna of the unit composite antenna device of the present invention. In the figure, the parts with the same reference numerals as in FIG. 6 represent the same objects. In the illustrated example, the TEL antenna 30 is made of an inverted L-shaped element whose top 31 is bent parallel to the circuit board 2 of the unit 1. The TEL antenna 30 has a low band element 33, which is connected to the top 31 on the side closer to the multiple resonance antenna 40 and extends toward the opposite side to the multiple resonance antenna 40. The top 31, including the low band element 33, is made of an inverted L-shaped element bent parallel to the circuit board 2 of the unit 1. In this example, the TEL antenna 30 can also be made low-profile by bending the top 31. The TEL antenna may also be configured as an inverted F-type element with a short circuit.

The multiple resonance antenna 40 shown in FIG. 7 has an element 44 for a lower frequency band than the 2.4 GHz band element 41. As shown in the figure, the elements may be arranged in order of increasing frequency band from the side closest to the TEL antenna 30 to the side furthest from the side furthest from the TEL antenna 30. The low frequency band element 44 in the illustrated example has its top bent parallel to the circuit board 2 and its tip bent further to ensure the element length.

Next, an example of the composite antenna device for a unit of the present invention configured as a MIMO will be described with reference to FIG. 8. FIG. 8 is a schematic perspective view for explaining an example of the composite antenna device for a unit of the present invention configured as a MIMO. In the figure, parts with the same reference numerals as in FIG. 1 represent the same items. As shown in the figure, this example is configured as a MIMO using a plurality of first power supply units 10, second power supply units 20, TEL antennas 30, and multiple resonance antennas 40 as a set. In the illustrated example, an example of a MIMO configuration with two sets of a set of the first power supply unit 10, second power supply unit 20, TEL antennas 30, and multiple resonance antennas 40, and a set of the first power supply unit 10', second power supply unit 20', TEL antennas 30', and multiple resonance antennas 40' is shown. Note that the TEL antennas 30, 30' are shown configured as inverted L-shaped elements having elements 33, 33' for the Low Band.

Specifically, in the drawing, the first power supply part 10 is disposed near the left edge of the circuit board 2, while the first power supply part 10' is disposed near the right edge of the circuit board 2. Each of the first power supply parts 10, 10' is disposed point-symmetrically about the circuit board 2 of the unit 1. This allows each element to be physically separated as far as possible, ensuring isolation between the elements.

Here, in the composite antenna device built into the unit 1, wavelength shortening and impedance deviations may occur depending on the antenna placement position due to the influence of the communication circuit section 3 and battery placed in the unit 1. Therefore, for example, the lengths of the low band element 33 connected to the TEL antenna 30 and the low band element 33' connected to the TEL antenna 30' are different as shown in the figure. In this way, it is possible to adjust the element lengths of the TEL antenna and the multiple resonance antenna so that equivalent received signals can be obtained appropriately in MIMO.

The unit-embedded composite antenna device of the present invention is not limited to the above-mentioned illustrated example, and various modifications can be made without departing from the spirit of the present invention.

REFERENCE SIGNS LIST 1 unit 2 circuit board 3 communication circuit section 10 first power supply section 20 second power supply section 30 TEL antenna 31 top section 33 low band element 40 multiple resonance antenna 41 2.4 GHz band element 42 5 GHz band element 43 top section 44 low frequency band element

Claims (9)

A composite antenna device for incorporation into a unit, the composite antenna device for a unit comprising:
a first power supply portion disposed near an edge of a circuit board of the unit;
a second power supply portion disposed near an edge of the circuit board of the unit at a position different from that of the first power supply portion;
a TEL antenna connected to the first power supply portion, the TEL antenna being made up of a monopole antenna element that is erected perpendicular to a circuit board of the unit and has an open end that extends along the vicinity of an edge of the circuit board in a top view at least toward the second power supply portion;
a multiple resonance antenna connected to the second power supply portion and having a plurality of elements of different frequency bands, the multiple resonance antenna being erected perpendicularly to a circuit board of the unit, and the elements of different frequency bands being arranged in descending order of frequency band from the side closer to the TEL antenna to the side farther from the TEL antenna in a top view along the vicinity of an edge of the circuit board;
A composite antenna device for incorporating a unit, comprising: The composite antenna device for incorporating a unit according to claim 1, characterized in that the TEL antenna is made of a conductive plate and has a tapered tip shape toward the open end. A composite antenna device for incorporating a unit according to claim 2, characterized in that the TEL antenna has a tip shape that tapers in the opposite direction to the second power supply section along the vicinity of the edge of the circuit board from the first power supply section when viewed from above. A composite antenna device for incorporating a unit according to claim 2 or 3, characterized in that the TEL antenna is arranged close to the monopole antenna element and the ground of the circuit board with a predetermined length and gap. A composite antenna device for incorporation into a unit according to any one of claims 1 to 4, characterized in that the TEL antenna is composed of an inverted L-type element or an inverted F-type element whose top is bent parallel to the circuit board of the unit. A composite antenna device for incorporating a unit according to any one of claims 1 to 5, characterized in that the TEL antenna further has a low band element connected to the top and having a lower frequency band than the monopole antenna element. A composite antenna device for incorporating a unit according to any one of claims 1 to 6, characterized in that the multiple resonance antenna is a wireless LAN antenna having a 2.4 GHz band element and a 5 GHz band element. A composite antenna device for incorporation into a unit according to any one of claims 1 to 7, characterized in that the multiple resonance antenna is composed of an inverted L-type element or an inverted F-type element whose top is bent in a direction perpendicular to the TEL antenna and parallel to the circuit board of the unit. A composite antenna device for incorporation into a unit according to any one of claims 1 to 8, characterized in that the composite antenna device for incorporation into a unit is configured as a MIMO using a first power supply section, a second power supply section, a TEL antenna, and a multiple resonance antenna as a set.