JP2022156434A - Composite antenna device for built-in unit - Google Patents

Abstract

To provide a composite antenna device for a built-in unit that can reduce the influence of interference between antenna elements and achieve optimum impedance matching even when the device is built into a unit.SOLUTION: A composite antenna device for the unit includes a first feeding portion 10, a second feeding portion 20, a TEL antenna 30, and a multi-resonant antenna 40. The first feeding portion 10 is arranged near the edge of a circuit board 2. The TEL antenna 30 includes a monopole antenna element that is connected to the first feeding portion 10 and has a portion that is erected at a right angle to the circuit board 2, and in which an open end extends at least in the direction of the second feeding portion 20 along the vicinity of the edge of the circuit board 2 when viewed from above. The multi-resonant antenna 40 is erected at a right angle to the circuit board 2, and elements of different frequency bands are arranged along the vicinity of the edge of the circuit board 2 in order of the frequency band from the side closer to the TEL antenna 30 to the side farther from the TEL antenna 30 when viewed from above.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a built-in composite antenna device, and more particularly to a built-in composite antenna device capable of supporting a plurality of frequency bands built into a unit such as a communication device unit mounted on a vehicle.

2. Description of the Related Art Telematics is known for providing information service to mobile objects such as vehicles using a mobile communication network. Telematics is used, for example, for automatic emergency calls when airbags are activated, tracking functions for vehicle theft, and traffic information distribution. In order to use the telematics service, it was necessary to install a communication unit and an antenna unit in the vehicle. Here, the communication device unit is for performing signal transmission/reception and control of wireless communication between the vehicle and the cloud, between vehicles, and between the passenger's mobile terminal. The antenna unit has antenna elements corresponding to 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 communicator units and antenna units were connected by coaxial cables and placed, for example, in the dashboard of the vehicle. Also, in some cases, only the antenna unit is arranged in the vehicle roof.

An antenna unit has a plurality of antenna elements corresponding to various frequency bands arranged therein, and the influence of interference between the plurality of antenna elements may cause problems in sensitivity and directivity. For example, Japanese Patent Laid-Open No. 2002-200002 discloses a system in which the influence of interference between antenna elements is reduced when a plurality of antenna elements are arranged using the entire volume of an antenna unit.

In recent years, a plurality of antenna elements are required not only for the fourth generation mobile communication network but also for MIMO and the like for realizing the fifth generation mobile communication network. Furthermore, there is a growing demand for lighter vehicles to improve fuel efficiency, and miniaturization of communication units and antenna units is also desired.

JP-A-2009-33571

In order to reduce the size and weight of the communication device unit and the antenna unit for using the telematics service, it is conceivable to incorporate the antenna element into the communication device unit. However, if the entire volume inside the antenna unit can be used, for example, as in Patent Document 1, the influence of interference between antenna elements can be reduced. In this case, the antenna elements must be efficiently arranged in the limited space, and the influence of interference between the antenna elements must be considered in the limited space inside the unit.

For such a plurality of antenna elements for built-in units, there has been no one that considers the influence of interference between the antenna elements.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a built-in composite antenna device that can reduce the influence of interference between antenna elements even when built in a unit and achieve optimum impedance matching.

In order to achieve the above object of the present invention, a composite antenna device for built-in unit according to the present invention comprises: a first feeding portion arranged near an end side of the circuit board of the unit; and a TEL antenna connected to the first feeding section, which is erected at a right angle to the circuit board of the unit and has an open end on the circuit board. A TEL antenna consisting of a monopole antenna element having a portion extending at least in the direction of the second feeding part along the vicinity of the edge, and a multiple resonance antenna having a plurality of elements of different frequency bands connected to the second feeding part It is erected at a right angle to the circuit board of the unit, and elements of different frequency bands are arranged along the vicinity of the edge of the circuit board from the side closer to the TEL antenna to the far side in descending order of the frequency band. , and a multi-resonant antenna.

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

Further, the TEL antenna may have a tip shape that tapers in the direction opposite to the second feeding section along the vicinity of the edge side of the circuit board in a top view from the first feeding section.

Also, the TEL antenna may be any one that brings the monopole antenna element and the ground of the circuit board close to each other with a predetermined length and gap.

The TEL antenna may also consist of an inverted L-shaped element or an inverted F-shaped element whose top is folded parallel to the circuit board of the unit.

The TEL antenna may further have a Low Band element connected to the top and having a frequency band lower than that of the monopole antenna element.

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

The multi-resonant antenna may also consist of an inverted L-shaped element or an inverted F-shaped element whose top is bent in a direction perpendicular to the TEL antenna and parallel to the circuit board of the unit.

Further, the unit built-in composite antenna device of the present invention may be configured as MIMO using a plurality of sets of the first feeding section, the second feeding section, the TEL antenna and the multiple resonance antenna.

The composite antenna device for unit built-in according to the present invention has the advantage of reducing the influence of interference between antenna elements and enabling optimum impedance matching.

FIG. 1 is a schematic perspective view for explaining the 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 composite antenna device for unit according to the present invention. FIG. 3 is a VSWR characteristic graph of the composite antenna device for unit according to the present invention. FIG. 4 shows VSWR characteristics of a further comparative example. FIG. 5 shows VSWR characteristics of a further comparative example. FIG. 6 is a schematic perspective view for explaining another configuration example of the TEL antenna and the multiple resonance antenna of the composite antenna device for unit according to the present invention. FIG. 7 is a schematic perspective view for explaining still another configuration example of the TEL antenna and the multiple resonance antenna of the composite antenna device for unit according to the present invention. FIG. 8 is a schematic perspective view for explaining an example in which the composite antenna device for unit according to the present invention is configured as MIMO.

Hereinafter, embodiments for carrying out the present invention will be described together with illustrated examples. FIG. 1 is a schematic perspective view for explaining the overall image of a composite antenna device for a unit according to 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 feeding section 10, a second feeding 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 has a communication circuit section 3 mounted on a rectangular circuit board 2 together with various connectors and the like, and is housed in a cubic case. Such a unit 1 is arranged, for example, in the dashboard of a vehicle. The composite antenna device for a unit of the present invention arranges various antennas in such a limited space in the unit 1. FIG.

The first power feeder 10 is arranged near the edge of the circuit board 2 of the unit 1 . That is, the empty space on the edge of the circuit board 2 of the unit 1 is also used as a circuit board for the antenna. The first feeding section 10 is a feeding section for a TEL antenna, which will be described later. In the illustrated example, the first power supply unit 10 is arranged in the vicinity of the short side of the circuit board 2 . However, the present invention is not limited to this, and the first power feeding section 10 may be arranged near the end side of the long side. Since the frequency band used for TEL requires a wide band from the low frequency region, it is preferable that the ground of the circuit board 2 be as large as possible.

The second power feeder 20 is arranged at a different position from the first power feeder 10 on the circuit board 2 of the unit 1 . The second feeding section 20 is a feeding section for a multiple resonance antenna 40, which will be described later. The second power feeding section 20 may be arranged, for example, near the edge of the same side of the circuit board on which the first power feeding section 10 is arranged. The illustrated example shows an example in which the second power feeding section 20 is arranged in the vicinity of the short side of the circuit board 2 . However, the present invention is not limited to this, and the second power feeding section 20 may be arranged near the end side of the long side.

The TEL antenna 30 is connected to the first feeding section 10 . The TEL antenna 30 consists of a monopole antenna element. Specifically, the TEL antenna 30 may be an antenna compatible with, for example, Sub 6 (frequency band of 6 GHz or lower) of the 5th generation mobile communication network. The TEL antenna 30 is erected on the circuit board 2 of the unit 1 at right angles. The open end of the monopole antenna element of the illustrated TEL antenna 30 has a portion extending in the direction of the second feeding section 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, and has a shape such that it is erected at right angles to the circuit board 2 and then bent 90 degrees so as to be parallel to the circuit board 2 . , extends in parallel with the edge of the circuit board 2 in the direction of the second feeding section 20 .

The multiple resonance antenna 40 is connected to the second feeding section 20 . The multiple resonance antenna 40 is composed of, for example, a monopole antenna element, and has a plurality of elements of different frequency bands. Specifically, it has elements compatible with various frequency bands, such as a wireless LAN antenna for 2.4 GHz band and 5 GHz band, a Bluetooth (registered trademark) antenna, and an antenna for keyless entry. The second feed section 20 serves as a common feed section for these different frequency band elements. A multi-resonant antenna 40 is erected at right angles to the circuit board 2 of the unit 1 . Elements of different frequency bands of the multi-resonant antenna 40 are arranged along the vicinity of the edge of the circuit board 2 in top view from the side closer to the TEL antenna 30 to the side farther from the TEL antenna 30 in descending order of frequency bands. 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.

Details of the arrangement of the TEL antenna 30 and the multiple resonance antenna 40 will be described with reference to FIG. FIG. 2 is a schematic side view for explaining the arrangement relationship between the TEL antenna and the multiple resonance antenna of the composite antenna device for a unit of the present invention, and FIGS. 2(a) to 2(c) are modifications of the TEL antenna. is. In the figure, the parts denoted by the same reference numerals as those in FIG. 1 represent the same parts. In each of the illustrated examples, the TEL antenna 30 is a monopole antenna element that is made of a conductive plate and has a tip that tapers toward the open end. It functions as a bowtie antenna. If it is difficult to secure the band and adjust the impedance in the limited space in the unit with the linear element as shown in FIG. Optimal placement within a limited space is possible by doing so.

In the example shown in FIG. 2(a), the TEL antenna 30 has a top portion parallel to the circuit board 2, a right end portion perpendicular to the circuit board 2 in the drawing, and a tip shape that tapers toward the left side. have. In the TEL antenna 30, the monopole antenna element and the ground of the circuit board 2 are brought close to each other with a predetermined length and gap. Specifically, the TEL antenna 30 is configured such that the first feeding section 10 is arranged substantially in the center of the position where the TEL antenna 30 and the ground of the circuit board 2 are brought close to each other with a predetermined length and gap. It is By deliberately connecting the TEL antenna 30 and the ground of the circuit board 2, impedance matching of the TEL antenna 30 can be performed. That is, 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 .

Further, in the example shown in FIG. 2B, the TEL antenna 30 has an element 33 for Low Band. In order to make the TEL antenna 30 a multiband antenna corresponding to a frequency band lower than the frequency band of, for example, 1452 MHz to 5000 MHz, which is the resonance band of a monopole antenna having a tip shape that tapers toward the open end of the TEL antenna 30, the TEL antenna 30 A Low Band element 33 is added to the monopole antenna element that constitutes the . The Low Band element 33 specifically corresponds to the frequency band from 699 MHz to 960 MHz. The Low Band element 33 shown in FIG. 2B is connected to the top portion 31 farther from the multiple resonance antenna 40 . Then, it extends from the top portion 31 side farther from the multiple resonance antenna 40 toward the multiple resonance antenna 40 side. Also, in order to secure the required element length, the Low Band element 33 may be bent toward the multiple resonance antenna 40 and then bent back. 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 side. Furthermore, the open end of the Low Band element 33 may extend along the other side of the circuit board 2 . In this manner, the arrangement position can be appropriately adjusted according to the arrangement position and space of the communication circuit section 3 in the unit 1. FIG.

Further, in the example shown in FIG. 2(c), the TEL antenna 30 is tapered in the direction opposite to the second power feeding section 20 along the vicinity of the edge of the circuit board 2 in a top view from the first power feeding section 10. It has a tip shape. That is, the open end of the TEL antenna has a tip shape along the vicinity of the edge side of the circuit board 2 in the top view, not only in the direction of the second power feeding section 20, but also in the direction opposite to the second power feeding section. It is a monopole antenna element. By appropriately adjusting the shape of the monopole antenna element of the TEL antenna 30 according to the space inside the unit 1, impedance matching is possible.

2(a) to 2(c), each of the multiple resonance antennas 40 shown in FIGS. They are arranged in descending order of frequency band. The multiple resonance antenna 40 is composed of a wireless LAN antenna having, for example, 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, 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 and extends from the middle of the 2.4 GHz band element 41 . 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 increase in frequency from the side closer to the TEL antenna 30 along the vicinity of the edge of the circuit board 2 toward the far side. placed in order. That is, the 5 GHz band element 42 is arranged closer to the TEL antenna 30 . By arranging them in this way, the influence of interference between the TEL antenna 30 and the multi-resonant antenna 40 can be reduced, and optimum impedance matching can be achieved.

The effect of the composite antenna device for unit according to the present invention will be described below with reference to FIG. FIG. 3 is a VSWR characteristic graph of the composite antenna device for unit according to the present invention. In the figure, the solid black line is the characteristic of the TEL antenna of the composite antenna device for unit of the present invention, and the solid gray line is the characteristic of the multi-resonant antenna of the composite antenna device for unit of the present invention. The TEL antenna used had an element for Low Band connected to the top on the far side from the multi-resonant antenna. Moreover, specifically, a wireless LAN antenna with a 2.4 GHz band element and a 5 GHz band element was used as the multiple resonance antenna. As Comparative Example 1, the dotted line shows the VSWR characteristics when the 5 GHz band element of the multiple resonance antenna is arranged farther from the TEL antenna. 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 multi-resonant antenna of Comparative Example 1. FIG.

As shown in FIG. 3, in the vicinity of the 5 GHz band of the multiple resonance antenna, the composite antenna device for unit of the present invention has lower VSWR characteristics than Comparative Example 1, and the impedance matching is optimum. Moreover, although not shown, it was found that the composite antenna device for a unit according to the present invention provided an isolation of 20 dB or more in the vicinity of the 5 GHz band.

Next, for further comparison, FIG. 4 shows VSWR characteristics when using a TEL antenna having a Low Band element connected to the top on the side closer to the multi-resonant antenna. FIG. 4 shows the VSWR characteristics when the Low Band element of the TEL antenna is connected to the top near the multi-resonant antenna. In the figure, the solid line shows the VSWR characteristics when the 5 GHz band element of the multiple resonance antenna of the composite antenna apparatus for a unit 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 composite antenna device for unit of the present invention, and the solid gray line is the characteristic of the multi-resonant antenna of the composite antenna device for unit of the present invention. Further, as Comparative Example 2, the dotted line shows the characteristics when the 5 GHz band element of the multiple resonance antenna is arranged closer to the TEL antenna. 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 multi-resonant antenna of Comparative Example 3. FIG.

As can be seen with reference to FIG. 4, even when the connection position of the Low Band element is connected to the top of the side closer to the multiple resonance antenna, the multiple resonance antenna moves from the side closer to the TEL antenna toward the far side. It can be seen that the configuration of the composite antenna device for a unit according to the present invention, which is arranged in descending order of frequency bands, has good VSWR characteristics for both the TEL antenna and the multiple resonance antenna.

For further comparison, FIG. 5 shows VSWR characteristics when the positions of the TEL antenna and the multi-resonant antenna are exchanged. FIG. 5 shows the VSWR characteristics when the positions of the TEL antenna and the multi-resonant antenna are exchanged and the multi-resonant antenna is placed on the side opposite to the open end of the TEL antenna. That is, the multi-resonant antenna was arranged on the side perpendicular to the circuit board opposite to the tip shape of the TEL antenna. In addition, the Low Band element is an example connected to the top portion on the far side of the multi-resonant antenna. As Comparative Example 3, the solid line shows the VSWR characteristics when the 5 GHz band element of the multi-resonant antenna is arranged farther from the TEL antenna. 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 multi-resonant antenna of Comparative Example 3. FIG. Further, as Comparative Example 4, the dotted line shows the characteristics when the 5 GHz band element of the multiple resonance antenna is arranged closer to the TEL antenna. 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 multi-resonant antenna of Comparative Example 4. FIG.

As can be seen from FIG. 5, when the multiple resonance antenna is arranged on the side opposite to the open end of the TEL antenna, the VSWR characteristic of the TEL antenna has a fractional band compared to the examples of the present invention shown in FIGS. It can be seen that the 1400 MHz band is narrow and cannot be secured sufficiently. In addition, when the TEL antenna has a tip shape that tapers to the left and right as shown in FIG. However, even in this case, it is preferable that the higher frequency band side of the multiple resonance antenna be arranged on the TEL antenna side.

Next, other configuration examples of the TEL antenna and the multiple resonance antenna of the composite antenna device for unit according to the present invention will be described. FIG. 6 is a schematic perspective view for explaining another configuration example of the TEL antenna and the multiple resonance antenna of the composite antenna device for unit according to the present invention. In the figure, the parts denoted by the same reference numerals as those in FIG. 1 represent the same parts. In the illustrated example, illustration of the communication circuit section is omitted, and a portion of the circuit board 2, the TEL antenna 30, and the multiple resonance antenna 40 are shown. First, the TEL antenna 30 has an element 33 for Low Band. The Low Band element 33 is connected to the top portion 31 on the far side from the multiple resonance antenna 40 and extends toward the multiple resonance antenna 40 side. Further, the top portion 31 including the Low Band element 33 is composed of an inverted L-shaped element that is folded parallel to the circuit board 2 of the unit 1 . By bending the top portion 31 of the TEL antenna 30, the height can be reduced. The TEL antenna may be configured as an inverted F-type element further provided with a short circuit.

Also, the multi-resonant antenna 40 may be an inverted L-shaped element with its top portion 43 bent in a direction perpendicular to the TEL antenna 30 and parallel to the circuit board 2 of the unit 1, as shown. That is, the open end side of the element (2.4 GHz element 41) on the low frequency band side of the multiple resonance antenna 40 is bent perpendicularly to the TEL antenna 30 by 90 degrees. This makes it possible to reduce the height of the multi-resonant antenna 40 as well as the TEL antenna 30 . In the illustrated example, the lower frequency band element (2.4 GHz band element 41) has a longer element length and is bent to form an inverted L-shaped element. The high frequency band element (5 GHz band element 42) may also be configured with an inverted L-shaped element. Further, the multiple resonance antenna 40 may be composed of an inverted F-shaped element provided with a short-circuit portion, if necessary.

Further, still another configuration example of the TEL antenna and multiple resonance antenna of the composite antenna device for unit according to the present invention will be described with reference to FIG. FIG. 7 is a schematic perspective view for explaining still another configuration example of the TEL antenna and the multiple resonance antenna of the composite antenna device for unit according to the present invention. In the figure, the parts denoted by the same reference numerals as those in FIG. 6 represent the same parts. In the illustrated example, the TEL antenna 30 consists of an inverted L-shaped element whose top portion 31 is folded parallel to the circuit board 2 of the unit 1 . The TEL antenna 30 has a Low Band element 33. The Low Band element 33 is connected to the top portion 31 on the side closer to the multiple resonance antenna 40 and extends toward the side opposite to the multiple resonance antenna 40. is doing. The top portion 31 including the Low Band element 33 is composed of an inverted L-shaped element that is folded parallel to the circuit board 2 of the unit 1 . In this example as well, the height can be reduced by bending the top portion 31 of the TEL antenna 30 . The TEL antenna may be configured as an inverted F-type element further provided with a short circuit.

Moreover, the multiple resonance antenna 40 shown in FIG. As shown in the figure, they may be arranged from the side closer to the TEL antenna 30 to the side farther from the TEL antenna 30 in descending order of frequency band. The low-frequency band element 44 shown in the figure is an example in which the top part is bent parallel to the circuit board 2 and the tip part is further bent to secure the element length.

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

Specifically, in the drawing, the first power feeding portion 10 is arranged near the left side of the circuit board 2 , while the first power feeding portion 10 ′ is arranged near the right side of the circuit board 2 . . Each of the first feeding parts 10 and 10' is arranged point-symmetrically with the circuit board 2 of the unit 1 as the center. As a result, each element can be physically separated as much as possible, so that isolation between the elements can be ensured.

Here, in the compound antenna apparatus built in the unit 1, the influence of the communication circuit section 3, the battery, etc. arranged in the unit 1 may cause wavelength shortening and impedance deviation depending on the position of the antenna. Therefore, for example, the Low Band element 33 connected to the TEL antenna 30 and the Low Band element 33' connected to the TEL antenna 30' have different lengths as shown. In this way, it is possible to adjust the element lengths of the TEL antenna and the multi-resonant antenna, etc., so that equivalent received signals can be obtained in MIMO.

The unit built-in compound antenna device of the present invention is not limited to the above-described illustrated examples, and it goes without saying that various modifications can be made without departing from the scope of the present invention.

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

Claims (9)

A composite antenna device to be incorporated in a unit, the composite antenna device for the unit comprising:
a first power feeder arranged near an edge of the circuit board of the unit;
a second power supply section arranged near an edge at a position different from the first power supply section on the circuit board of the unit;
A TEL antenna connected to the first feeding section, which is erected at a right angle to the circuit board of the unit and has an open end extending at least in the direction of the second feeding section along the vicinity of the edge of the circuit board when viewed from above. a TEL antenna comprising a monopole antenna element having an extending portion;
A multi-resonant antenna having a plurality of elements of different frequency bands connected to the second feeder, wherein the antenna is erected at right angles to the circuit board of the unit, and the elements of different frequency bands are near the edges of the circuit board when viewed from above. a multi-resonant antenna arranged in descending order of frequency band from the side closer to the TEL antenna along the top to the side farther from the TEL antenna;
A composite antenna device for built-in unit, characterized by comprising: 2. A composite antenna device for built-in unit according to claim 1, wherein said TEL antenna is made of a conductive plate and has a tip shape tapering toward an open end. 3. The unit built-in composite antenna device according to claim 2, wherein said TEL antenna has a tip that tapers in the direction opposite to said second feeding section along the vicinity of the edge of the circuit board in top view from said first feeding section. A compound antenna device for built-in unit, characterized by having a shape. 4. A unit built-in compound antenna device according to claim 2 or claim 3, wherein said TEL antenna brings the monopole antenna element and the ground of the circuit board close to each other with a predetermined length and gap. Built-in composite antenna device. 5. The compound antenna device for built-in unit according to any one of claims 1 to 4, wherein said TEL antenna is composed of an inverted L-shaped element or an inverted F-shaped element whose top portion is bent parallel to the circuit board of the unit. A composite antenna device for unit built-in, characterized by: 6. The unit built-in composite antenna device according to claim 1, wherein said TEL antenna further comprises a Low Band element connected to the top and having a frequency band lower than that of the monopole antenna element. A compound antenna device for built-in unit characterized by: 7. The unit built-in composite antenna device according to claim 1, wherein said multi-resonant antenna is a wireless LAN antenna having a 2.4 GHz band element and a 5 GHz band element. compound antenna device for 8. The composite antenna device for built-in unit according to claim 1, wherein said multiple resonance antenna is an inverted L-shaped element whose top portion is bent in a direction perpendicular to the TEL antenna and parallel to the circuit board of the unit, or A compound antenna device for built-in unit, characterized by being composed of an inverted F-type element. 9. The composite antenna device for built-in unit according to claim 1, wherein the composite antenna device for built-in unit includes a first feeding section, a second feeding section, a TEL antenna and a multiple resonance antenna. 1. A unit built-in composite antenna device characterized by being configured as MIMO using a plurality of sets.

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