JP2022056182A - Antenna module and antenna device - Google Patents

Abstract

To provide an antenna module and an antenna device with which, while utilizing apparatus housing as a plurality of antennas, it is possible to improve isolation between the plurality of antennas.SOLUTION: An antenna module 10 comprises a first and a second antenna connecting conductor 30a, 30b, a first and a second power feeding line 40a, 40b, a conductor part 50a, and a ground conductor 61. The first and second antenna connecting conductors 30a, 30b are electrically connected to the conductive housing of an apparatus. The first and second power feeding lines 40a, 40b are connected to the first and second antenna connecting conductors 30a, 30b, respectively. The conductor part 50a extends from the first power feeding line 40a and is spatially separated from the first antenna connecting conductor 30a. The ground conductor 61 exists between the first antenna connecting conductor 30a and the conductor part 50a, and is spatially separated from both the first and second antenna connecting conductors 30a, 30b and the conductor part 50a.SELECTED DRAWING: Figure 3

Description

The present invention generally relates to an antenna module and an antenna device. The present invention particularly relates to an antenna module for communicating using a plurality of antennas, and an antenna device.

Patent Document 1 discloses an antenna device for a mobile terminal. The antenna device includes a main board having a plurality of antennas, a plurality of power supplies connected to each of the plurality of antennas, a metal battery cover having a plurality of first ground points, and a plurality of first ground points on the main board. A plurality of first connecting members connected to each of the plurality of second ground points are provided. Here, the plurality of second ground points correspond to a plurality of power supplies, respectively.

U.S. Patent Application Publication No. 2018/145405

In Patent Document 1, it is possible to effectively reduce the adverse effect of the metal battery cover on the antenna performance. However, Patent Document 1 does not consider isolation between a plurality of antennas.

An object of the present invention is to provide an antenna module and an antenna device that can improve the isolation between a plurality of antennas while making the housing of the device usable as a plurality of antennas.

The antenna module of one aspect of the present invention includes first and second antenna connecting conductors, first and second feeding wiring, a conductor portion, and a ground conductor. The first and second antenna connecting conductors are electrically connected to the conductive housing of the device. The first and second feeding wires are connected to the first and second antenna connecting conductors, respectively. The conductor portion extends from the first feeding wiring and is spatially separated from the first and second antenna connecting conductors. The ground conductor is between the first antenna connecting conductor and the conductor portion, and is spatially separated from both the first and second antenna connecting conductors and the conductor portion.

The antenna device of one aspect of the present invention includes the antenna module and the housing.

According to the present invention, there is an effect that the isolation between a plurality of antennas can be improved while the housing of the device can be used as a plurality of antennas.

Explanatory drawing of antenna module of one Embodiment An exploded perspective view of the antenna unit of the above antenna module Top view of the antenna board of the above antenna unit Bottom view of the antenna board of the above antenna unit Partial enlarged view of the antenna board of the above antenna unit A perspective view showing the state in which the above antenna unit is mounted on the housing. Cross-sectional view showing the state in which the above antenna unit is mounted on the housing. Graph showing the isolation of the above antenna module Graph showing the isolation of the comparative example of the above antenna module Explanatory drawing of the antenna module of the modification 1 Top view of the antenna board of the antenna module of variant 1 Graph showing the return loss of the antenna module of the first modification Graph showing the return loss of the antenna module of the above embodiment Graph showing the isolation of the antenna module of the first modification Graph showing the isolation of the antenna module of the above embodiment Explanatory drawing of the antenna module of modification 2 Top view of the antenna board of the antenna module of variant 2 Top view of the antenna board of the antenna module of the modification 3 Top view of the antenna board of the antenna module of the modification 4 Top view of the antenna board of the antenna module of the modification 5

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings as the case may be. However, the following embodiments are examples for explaining the present disclosure, and are not intended to limit the present disclosure to the following contents. Unless otherwise specified, the positional relationship such as up, down, left, and right shall be based on the positional relationship shown in the drawings. Each figure described in the following embodiment is a schematic view, and the ratio of the size and the thickness of each component in each figure does not necessarily reflect the actual dimensional ratio. not. Further, the dimensional ratio of each element is not limited to the ratio shown in the drawings.

(1) Outline of the Embodiment (1-1) FIG. 1 shows an antenna device 1 including the antenna module 10 of the embodiment. The antenna module 10 is used by the device 100 for wireless communication with another device 200. The device 100 has a housing 110. The housing 110 has conductivity. The housing 110 is used as a frame ground in the device 100. In this embodiment, the device 100 is a television. The housing 110 is a metal housing that is the outer shell of the television. The device 200 is a terminal device. Examples of terminal devices include desktop computers, laptop computers, and mobile terminals (smartphones, tablet terminals, wearable terminals, etc.).

The antenna module 10 has an antenna unit 11 as shown in FIGS. 1 and 2. The antenna unit 11 has an antenna substrate 111 as shown in FIGS. 2 and 3. The antenna module 10 (antenna substrate 111) includes antenna connecting conductors 30a and 30b (hereinafter collectively referred to as reference numeral 30), feeding wirings 40a and 40b (hereinafter collectively referred to as reference numeral 40), and a conductor portion 50a. , 50b (hereinafter collectively referred to as reference numeral 50) and ground conductors 611a, 611b, 612a, 612b (hereinafter collectively referred to as reference numeral 61). The antenna connecting conductors 30a and 30b are electrically connected to the conductive housing 110 of the device 100. The feeding wires 40a and 40b are connected to the antenna connecting conductors 30a and 30b, respectively. The conductor portion 50a extends from the feeding wiring 40a and is spatially separated from the antenna connecting conductors 30a and 30b. The ground conductors 611a and 612a are located between the antenna connecting conductor 30a and the conductor portion 50a, and are spatially separated from both the antenna connecting conductors 30a and 30b and the conductor portion 50a. The antenna connecting conductors 30a and 30b and the feeding wirings 40a and 40b are the "first antenna connecting conductor", the "second antenna connecting conductor", the "first feeding wiring", and the "second feeding wiring" in the present disclosure, respectively. Corresponds to.

In the antenna module 10, the antenna connecting conductors 30a and 30b are electrically connected to the housing 110 of the device 100, and the feeding wires 40a and 40b are connected to the antenna connecting conductors 30a and 30b, respectively. As a result, the antenna module 10 can use the housing 110 as a plurality of antennas. More specifically, the vicinity of the connection point with the antenna connection conductors 30a and 30b in the housing 110 can function as an antenna corresponding to the antenna connection conductors 30a and 30b. Here, the antenna module 10 includes a conductor portion 50a. The conductor portion 50a extends from the feeding wiring 40a and is spatially separated from the antenna connecting conductors 30a and 30b. Therefore, improvement in isolation can be expected at the resonance frequency of the conductor portion 50a. In addition, the antenna module 10 includes ground conductors 611a, 612a. The ground conductors 611a and 612a are located between the antenna connecting conductor 30a and the conductor portion 50a, and are spatially separated from both the antenna connecting conductors 30a and 30b and the conductor portion 50a. The ground conductors 611a and 612a can reduce the influence of the capacitive component between the antenna connecting conductor 30a and the housing 110 on the conductor portion 50a. As a result, the effect of improving isolation by the conductor portion 50a is less likely to be suppressed, and improvement in isolation can be expected. As described above, according to the antenna module 10 of the present embodiment, the isolation between the plurality of antennas can be improved while the housing 110 of the device 100 can be used as a plurality of antennas.

(1-2) Details Hereinafter, the antenna module 10 of the present embodiment will be described in more detail with reference to FIGS. 1 to 9.

As shown in FIG. 1, the antenna module 10 includes an antenna unit 11 and a communication circuit 12.

As shown in FIG. 2, the antenna unit 11 includes an antenna substrate 111, a plurality of connecting members 112a and 112b (hereinafter, collectively referred to as reference numerals 112), and a fixing member 113. The connecting members 112a and 112b correspond to the "first connecting member" and the "second connecting member" in the present disclosure, respectively.

As shown in FIGS. 2 to 4, the antenna substrate 111 includes a dielectric substrate 20. The antenna board 111 includes a plurality of antenna connecting conductors 30 (two antenna connecting conductors 30a and 30b in the present embodiment) and a plurality of feeding wirings 40 (two feeding wirings 40a and 40b in the present embodiment). .. The antenna substrate 111 includes a plurality of conductor portions 50 (two conductor portions 50a, 50b in the present embodiment) and a plurality of ground conductors 61 (four ground conductors 611a, 612a, 611b, 612b in the present embodiment). To prepare for. The antenna board 111 includes ground portions 62 and 63. The conductor portions 50a and 50b correspond to the "first conductor portion" and the "second conductor portion" in the present disclosure, respectively. Each of the ground conductors 611a and 612a corresponds to the "first ground conductor" in the present disclosure, and each of the ground conductors 611b and 612b corresponds to the "second ground conductor" in the present disclosure.

The dielectric substrate 20 serves as a base material for the antenna substrate 111. As shown in FIG. 2, the dielectric substrate 20 has a rectangular plate shape, and has a thickness, a length, and a width. As shown in FIG. 3, the dielectric substrate 20 has a first end 20a and a second end 20b in the first direction D10 (vertical direction in FIG. 3). The dielectric substrate 20 has a third end 20c and a fourth end 20d in the second direction D20 (left-right direction in FIG. 3). The first direction D10 and the second direction D20 are directions orthogonal to the thickness direction of the dielectric substrate 20. The first direction D10 and the second direction D20 are directions orthogonal to each other. In the present embodiment, the first direction D10 is the width direction and the second direction D20 is the length direction. The dielectric substrate 20 has a first surface 21 and a second surface 22 in the thickness direction (see FIGS. 2 to 4). Two antenna connecting conductors 30, two feeding wirings 40, two conductor portions 50, four ground conductors 61, and a ground portion 62 are formed on the first surface 21 (see FIG. 3). A ground portion 63 is formed on the second surface 22 (see FIG. 4). As shown in FIG. 3, the first surface 21 includes a first region 211 and a second region 212. The first region 211 and the second region 212 are adjacent to each other in the first direction D10. The first region 211 and the second region 212 are regions obtained by dividing the first surface 21 into two by a straight line along the second direction D20. In the present embodiment, the first region 211 is larger than the second region 212 (the dimension in the first direction D10 is larger). In the first region 211, two antenna connecting conductors 30, two feeding wirings 40, four ground conductors 61, and a ground portion 62 are formed. Two conductor portions 50 are formed in the second region 212. Examples of the dielectric substrate 20 include a low-temperature co-fired ceramics (LTCC) multilayer substrate, a multilayer resin substrate formed by laminating a plurality of resin layers composed of resins such as epoxy and polyimide, and a liquid crystal having a lower dielectric constant. A multi-layer resin substrate formed by laminating a plurality of resin layers composed of polyimide (LCP), a multi-layer resin substrate formed by laminating a plurality of resin layers composed of a fluororesin, and a ceramic multilayer other than LTCC. The substrate can be mentioned.

The antenna connecting conductors 30a and 30b are electrically connected to the housing 110 of the device 100. The antenna connecting conductors 30a and 30b are formed in the first region 211 of the first surface 21 of the dielectric substrate 20. The antenna connecting conductors 30a and 30b are arranged in the first region 211 at intervals in the second direction D20. In particular, in the present embodiment, the antenna connecting conductors 30a and 30b are located at the third end 20c and the fourth end 20d of the dielectric substrate 20 in the first region 211. The antenna connecting conductors 30a and 30b have the same shape. The antenna connecting conductor 30 has a rectangular shape in a plan view.

The feeding wires 40a and 40b are used as so-called feeding points. The feeding wires 40a and 40b are connected to the antenna connecting conductors 30a and 30b, respectively. The power feeding wiring 40 is used for connecting the communication circuit 12 and the antenna connecting conductors 30a and 30b. The power feeding wirings 40a and 40b are formed in the first region 211 of the first surface 21 of the dielectric substrate 20. The power feeding wirings 40a and 40b are arranged in the first region 211 at intervals in the second direction D20. In particular, in the present embodiment, the power feeding wirings 40a and 40b are located on the third end 20c and the fourth end 20d side of the dielectric substrate 20 in the first region 211. The power feeding wirings 40a and 40b are on the second end 20b side (second region 212 side) of the dielectric substrate 20 with respect to the antenna connecting conductors 30a and 30b. The power supply wirings 40a and 40b have the same shape. The power feeding wiring 40 has a straight strip shape in a plan view. In particular, the power feeding wiring 40 extends along the first direction D10 of the dielectric substrate 20. The power feeding wiring 40 has a first end 401 and a second end 402 in the first direction D10 which is the length direction. The first end 401 of the feeding wiring 40 is connected to the corresponding antenna connecting conductor 30 among the plurality of antenna connecting conductors 30. In the present embodiment, the first end 401 of the first and second feeding wires 40a and 40b are connected to the antenna connecting conductors 30a and 30b, respectively. The second end 402 of the power feeding wiring 40 is located at the boundary between the first region 211 and the second region 212. In this way, the power feeding wiring 40 extends from the antenna connecting conductor 30 toward the second region 212 in the first region 211.

The conductor portions 50a and 50b are provided for improving the isolation between the two antennas (between the antenna connecting conductors 30a and 30b) realized by the housing 110. The conductor portions 50a and 50b are formed in the second region 212 of the first surface 21 of the dielectric substrate 20. The conductor portions 50a and 50b are arranged in the second region 212 at intervals in the second direction D20. In particular, in the present embodiment, the conductor portions 50a and 50b are located on the third end 20c and the fourth end 20d side of the dielectric substrate 20 in the second region 212. The conductor portions 50a and 50b have a shape symmetrical with respect to a straight line along the first direction D10 of the dielectric substrate 20. The conductor portion 50 has a shape corresponding to a so-called grounded λ / 4 monopole antenna. The conductor portion 50 has a longer electrical length than the power feeding wiring 40. The electrical length of the conductor portion 50 is determined according to the frequency at which isolation is desired to be improved. In the present embodiment, the electric length of the conductor portion 50 is set to resonate in a frequency band near 2.4 GHz (2400 MHz to 2500 MHz). Here, the electrical length means the electrical length of the medium as opposed to the physical length of the medium. It can be said that the electric length represents the length of the medium with respect to the delay time of the signal. The electrical length can be adjusted by a reactance element such as an inductor or a capacitor. In the present embodiment, the conductor portion 50 is L-shaped in a plan view. More specifically, the conductor portion 50 has a first portion 51 and a second portion 52. The first portion 51 extends from the second end 402 of the feeding wiring 40 along the first direction D10 of the dielectric substrate 20. The second portion 52 is from the tip of the first portion 51 (the end opposite to the second end 402 of the power feeding wiring 40) toward the center of the dielectric substrate 20 along the second direction D20 of the dielectric substrate 20. Extend. In this way, each of the two conductor portions 50 extends from a specific power feeding wiring among the plurality of feeding wirings 40. The conductor portion 50a extends from the specific power feeding wiring 40a of the two feeding wirings 40a and 40b, and the conductor portion 50b extends from the specific feeding wiring 40b of the two feeding wirings 40a and 40b. As described above, the conductor portion 50 is located on the side opposite to the antenna connecting conductor 30 with respect to the feeding wiring 40. As a result, it is expected that the influence of the capacitance component of the housing 110 and the antenna connecting conductor 30 on the conductor portion 50 can be reduced, and the isolation can be expected to be improved.

The ground conductors 611a, 612a and the ground conductors 611b, 612b are formed in the first region 211 of the first surface 21 of the dielectric substrate 20.

The ground conductors 611a and 612a are located between the antenna connecting conductor 30a and the second region 212, and are located on both sides of the feeding wiring 40a in the second direction D20 at regular intervals from the feeding wiring 40a. In particular, the ground conductor 611a is on the side opposite to the third end 20c of the dielectric substrate 20 with respect to the feeding wiring 40a, and the ground conductor 612a is with the third end 20c of the dielectric substrate 20 with respect to the feeding wiring 40a. On the same side. The power feeding wiring 40a is located next to the ground conductors 611a and 612a in the second direction D20 orthogonal to the first direction D10 where the antenna connecting conductor 30a and the conductor portion 50a are lined up, and the conductor portion 50a is grounded in the second direction D20. Not located next to conductors 611a, 612a. The ground conductors 611a and 612a are located between the antenna connecting conductor 30a and the conductor portion 50a. The ground conductor 611a is spatially separated from both the antenna connecting conductors 30a and 30b and the conductor portion 50a. As shown in FIG. 5, at least a part of the ground conductor 611a is in the predetermined region R1. The predetermined region R1 is the conductor portion 50a, the feeding wiring 40a, the antenna connecting conductor 30a, the conductor portion 50a (in the predetermined direction D21 intersecting the parallel direction (first direction D10)), and the end portion of the antenna connecting conductor 30a. It is an area surrounded by a straight line S1 connecting 521 and 301 to each other. Here, the predetermined direction D21 is a direction along the second direction D20 of the dielectric substrate 20 and is a direction toward the fourth end 20d from the third end 20c of the dielectric substrate 20. At least a portion of the ground conductor 612a is within the predetermined region R2. The predetermined region R2 is the conductor portion 50a, the feeding wiring 40a, the antenna connecting conductor 30a, the conductor portion 50a (in the predetermined direction D22 intersecting the parallel direction (first direction D10)), and the end portions of the antenna connecting conductor 30a. It is an area surrounded by a straight line S2 connecting 522, 302 to each other. Here, the predetermined direction D22 is a direction along the second direction D20 of the dielectric substrate 20 and is a direction toward the third end 20c from the fourth end 20d of the dielectric substrate 20.

The ground conductors 611b and 612b are located between the antenna connecting conductor 30b and the second region 212, and are located on both sides of the feeding wiring 40b in the second direction D20 at regular intervals from the feeding wiring 40b. In particular, the ground conductor 611b is on the side opposite to the fourth end 20d of the dielectric substrate 20 with respect to the feeding wiring 40b, and the ground conductor 612b is with the fourth end 20d of the dielectric substrate 20 with respect to the feeding wiring 40b. On the same side. The power feeding wiring 40b is located next to the ground conductors 611b and 612b in the second direction D20, and the conductor portion 50b is not located next to the ground conductors 611b and 612b in the second direction D20. The ground conductors 611b and 612b are located between the conductor portion 50b and the antenna connecting conductor 30b. The ground conductor 611b is spatially separated from both the antenna connecting conductors 30a and 30b and the conductor portion 50b. At least a part of the ground conductor 611b is in a predetermined region similar to the predetermined region R1. This predetermined region is surrounded by a conductor portion 50b, a power feeding wiring 40b, an antenna connecting conductor 30b, and a straight line connecting the conductor portions 50b (in the predetermined direction D22) and the ends 521, 301 of the antenna connecting conductor 30b. It is an area. At least a part of the ground conductor 612b is in a predetermined region similar to the predetermined region R2. This predetermined region is surrounded by a conductor portion 50b, a power feeding wiring 40b, an antenna connecting conductor 30b, and a straight line connecting the conductor portions 50b (in the predetermined direction D21) and the ends 522, 302 of the antenna connecting conductor 30b. It is an area.

In the antenna substrate 111, the ground conductor 61 (611a, 611b, 612a, 612b) is located between the antenna connecting conductor 30 and the conductor portion 50 in the parallel direction (first direction D10) in which the conductor portion 50 and the antenna connecting conductor 30 are lined up. Therefore, they are spatially separated from each of the plurality of antenna connecting conductors 30 and the conductor portion 50. As a result, it is expected that the influence of the capacitance component of the housing 110 and the antenna connecting conductor 30 on the conductor portion 50 can be reduced, and the isolation can be expected to be improved.

As shown in FIG. 3, the power feeding wiring 40 and the ground conductors 611 and 612 are located between the antenna connecting conductor 30 and the conductor portion 50 so as to be adjacent to each other. More specifically, the feeding wiring 40 is located next to the ground conductors 611 and 612 in the second direction D20 orthogonal to the first direction D10 where the antenna connecting conductor 30 and the conductor portion 50 are lined up. On the other hand, the conductor portion 50 is not located next to the ground conductors 611 and 612 in the second direction D20. The power feeding wiring 40 is a linear shape having a length and a width, so that the first end 401 and the second end 402 of the feeding wiring 40 in the length direction are connected to the antenna connecting conductor 30 and the conductor portion 50, respectively. It is located between the antenna connecting conductor 30 and the conductor portion 50. The feeding wiring 40 is located next to the ground conductors 611 and 612 in the width direction (second direction D20) of the feeding wiring 40. On the other hand, the conductor portion 50 is not located next to the ground conductors 611 and 612 in the width direction of the power feeding wiring 40. That is, the conductor portion 50 projects from the power feeding wiring 40 so as not to be adjacent to the ground conductors 611 and 612 in the second direction D20.

As shown in FIG. 3, the ground portion 62 is formed in the first region 211 of the first surface 21 of the dielectric substrate 20. The ground portion 62 includes a first portion 621 and a pair of second portions 622a, 622b. The first portion 621 is a portion between the antenna connecting conductors 30a and 30b in the direction in which the antenna connecting conductors 30a and 30b are lined up (second direction D20) and spatially separated from any of the antenna connecting conductors 30a and 30b. The first portion 621 has a rectangular shape in a plan view. In the present embodiment, the first portion 621 is connected to the ground conductors 611a and 611b. The pair of second sites 622a, 622b extend from the first site 621 along the second direction D20. The second portion 622a is located between the antenna connecting conductor 30a and the first end 20a of the dielectric substrate 20, and extends from the first portion 621 toward the third end 20c of the dielectric substrate 20. The second portion 622b is located between the antenna connecting conductor 30b and the first end 20a of the dielectric substrate 20, and extends from the first portion 621 toward the fourth end 20d of the dielectric substrate 20.

The ground portion 63 is formed on the second surface 22 of the dielectric substrate 20. As shown in FIG. 4, the ground portion 63 is formed on the second surface 22 of the dielectric substrate 20 over the entire region overlapping the first region 211 of the first surface 21.

The plurality of antenna connection conductors 30, the plurality of power feeding wirings 40, the plurality of conductor portions 50, the plurality of ground conductors 61, and the ground portions 62 and 63 are, for example, aluminum (Al), copper (Cu), and gold. It is formed by using (Au), silver (Ag), and a metal containing these alloys as a main component. The plurality of antenna connection conductors 30, the plurality of power feeding wirings 40, the plurality of conductor portions 50, the plurality of ground conductors 61, and the ground portions 62 and 63 can be formed by a conventionally known method, and thus are detailed. The explanation is omitted.

The connecting members 112a and 112b are used to electrically connect the antenna connecting conductors 30a and 30b to the housing 110, respectively. The connecting member 112 has conductivity. The connecting member 112 has a rectangular plate shape. In this embodiment, the connecting member 112 is a rectangular metal plate. The connecting member 112 has the same shape and size as the corresponding antenna connecting conductor 30 in a plan view. That is, the connecting member 112a has the same shape and size as the antenna connecting conductor 30a in a plan view, and the connecting member 112b has the same shape and size as the antenna connecting conductor 30b in a plan view. The connecting member 112 and the antenna connecting conductor 30 can be connected by using a conductive adhesive, solder, or the like. In the present embodiment, as shown in FIGS. 6 and 7, the connecting members 112a and 112b are located between the antenna connecting conductors 30a and 30b and the housing 110, and the antenna connecting conductors 30a and 30b are electrically connected to the housing 110, respectively. Connect to the target.

The fixing member 113 is used to fix the connecting members 112a and 112b to the housing 110 and to electrically connect them. The fixing member 113 has conductivity. The fixing member 113 has a size that allows contact with each of the connecting members 112a and 112b. In the present embodiment, the fixing member 113 has a size and a shape that come into contact with the entire surface of the connecting members 112a and 112b on the side opposite to the antenna connecting conductors 30a and 30b. The fixing member 113 has a rectangular plate shape. The connecting member 112 and the fixing member 113 can be connected by using a conductive adhesive, solder, or the like. In the present embodiment, as shown in FIGS. 6 and 7, the fixing member 113 is located between the connecting member 112 and the housing 110, and the connecting member 112 is fixed to the housing 110 and electrically connected to the housing 110.

In the antenna module 10 described above, the antenna unit 11 can be mounted on the housing 110 of the device 100 as shown in FIGS. 6 and 7. The antenna substrate 111 is arranged with the first surface 21 of the dielectric substrate 20 facing one surface of the housing 110. A plurality of connecting members 112 are connected to a plurality of antenna connecting conductors 30 of the antenna board 111, and the plurality of connecting members 112 are fixed to the one surface of the housing 110 by the fixing member 113. Since the plurality of connecting members 112 and the fixing member 113 have conductivity, the plurality of antenna connecting conductors 30 are electrically connected to the housing 110. In this way, the antenna module 10 together with the housing 110 constitutes the antenna device 1. In the antenna device 1, the antenna module 10 can be easily connected to the housing 110 by a plurality of connecting members 112. Further, in the antenna device 1, the antenna module 10 can be easily fixed to the housing 110 by the fixing member 113.

The communication circuit 12 performs wireless communication according to a predetermined communication standard by the antenna unit 11. This enables wireless communication with the same communication standard by a plurality of antennas. In this embodiment, the predetermined communication standard is Wi-Fi (registered trademark). The communication circuit 12 may be connected to the antenna board 111 by two coaxial cables. When connecting the coaxial cable to the antenna board 111, the inner conductors of the two coaxial cables are connected to the feeding wires 40a and 40b, respectively, and the outer conductors are connected to the ground conductors 611a and 611b, respectively (see FIG. 3).

The communication circuit 12 includes a transmission circuit 121 and a reception circuit 122.

The transmission circuit 121 gives a high frequency signal to the antenna unit 11 in order to transmit a radio signal (radio wave) through the housing 110. More specifically, the transmission circuit 121 is configured to give a high frequency signal in a predetermined frequency band to the plurality of antenna connection conductors 30 through the plurality of power feeding wirings 40. As schematically shown in FIG. 3, the transmission circuit 121 functions as a high frequency power supply AC connected between the power supply wiring 40a and the ground conductor 611a and between the power supply wiring 40b and the ground conductor 611b. (See FIG. 3). Here, the transmission circuit 121 gives the same high frequency signal to the plurality of antenna connection conductors 30. That is, a plurality of the same radio signals are output from the housing 110 that functions as a plurality of antennas. In the present embodiment, the predetermined frequency band is a frequency band near 2.4 GHz (2400 MHz to 2500 MHz) used for Wi-Fi. The transmission circuit 121 up-converts a signal to be transmitted to the device 200 into a high-frequency signal and gives it to the antenna unit 11, and outputs a wireless signal from the housing 110 as an antenna. Specifically, the transmission circuit 121 includes an amplifier circuit that amplifies the signal transmitted to the device 200, a mixer that up-converts the signal amplified by the amplification circuit into a high-frequency signal, and a plurality of high-frequency signals from the mixer (this implementation). In the form of, it includes a distributor that distributes to two). The transmission circuit 121 may further include a low noise amplifier, a power amplifier, an attenuator, and the like, if necessary. Since a conventionally known configuration can be adopted as the transmission circuit 121, detailed description thereof will be omitted.

The receiving circuit 122 receives a high frequency signal corresponding to the radio signal (radio wave) received by the housing 110 from the antenna unit 11. More specifically, the receiving circuit 122 is configured to receive high frequency signals in a predetermined frequency band from the plurality of antenna connecting conductors 30 through the plurality of feeding wirings 40. Here, the receiving circuit 122 receives the same high frequency signal from the plurality of antenna connecting conductors 30. As described above, the predetermined frequency band is a frequency band near 2.4 GHz (2400 MHz to 2500 MHz) used for Wi-Fi. The receiving circuit 122 down-converts and outputs the high frequency signal received from the antenna unit 11. Specifically, the receiving circuit 122 includes a signal synthesizer that synthesizes a plurality of (two in this embodiment) high-frequency signals from the antenna unit 11 and a mixer that down-converts the signals synthesized by the signal synthesizer. And an amplifier circuit that amplifies the signal from the mixer. The receiving circuit 122 may further include a low noise amplifier, a power amplifier, an attenuator, and the like, if necessary. Since a conventionally known configuration can be adopted as the receiving circuit 122, detailed description thereof will be omitted.

(1-3) Performance evaluation The antenna module 10 of the present embodiment uses Wi-Fi as a communication standard and uses a high frequency signal in a predetermined frequency band (frequency band near 2.4 GHz). The conductor portion 50 has an electric length that resonates in a frequency band (frequency band near 2.4 GHz) included in a predetermined frequency band. In order to confirm the effect of improving the isolation of the antenna module 10 of the present embodiment, the isolation was measured. The isolation measurement was carried out for the antenna substrate 111 of the antenna module 10 of the present embodiment and the antenna substrate of the comparative example. The antenna substrate of the comparative example is the same as the antenna substrate 111 except that the conductor portions 50a and 50b are not provided. FIG. 8 shows the result of the isolation measurement of the antenna substrate 111 of the present embodiment, and FIG. 9 shows the result of the isolation measurement of the comparative example. Specifically, FIGS. 8 and 9 are graphs showing frequency on the horizontal axis and isolation on the vertical axis, and are displayed at a lower position as the isolation is higher, that is, at a lower position as the isolation is improved. To. This also applies to FIGS. 14 and 15, which will be described later. The frequency range in which the isolation was measured is 2 GHz to 3 GHz. As is clear from FIGS. 8 and 9, according to the antenna substrate 111 of the present embodiment, it was confirmed that the isolation was improved in the vicinity of “Δ1”, “Δ2”, and “Δ3”. .. In FIGS. 8 and 9, “Δ1” is a point of 2400 MHz, “Δ2” is a point of 2442 MHz, and “Δ3” is a point of 2484 MHz. In FIG. 8, the isolation at “Δ1” is 16.704 dB, the isolation at “Δ2” is 15.734 dB, and the isolation at “Δ3” is 15.871 dB. In FIG. 9, the isolation at “Δ1” is 4.340 dB, the isolation at “Δ2” is 3.711 dB, and the isolation at “Δ3” is 3.921 dB.

As described above, according to the antenna module 10 of the present embodiment, while the housing 110 of the device 100 can be used as a plurality of antennas (while enabling communication using the housing 110 as a plurality of antennas). , The isolation between multiple antennas can be improved.

(2) Modifications The embodiments of the present disclosure are not limited to the above embodiments. The above-described embodiment can be variously changed according to the design and the like as long as the subject of the present disclosure can be achieved. The following is a list of modified examples of the above embodiment. The modifications described below can be applied in combination as appropriate.

(2-1) Modification 1
Hereinafter, the antenna device 1A including the antenna module 10A of the modification 1 will be described with reference to FIGS. 10 and 11. The antenna module 10A includes an antenna unit 11A and a communication circuit 12A.

The antenna unit 11A includes an antenna substrate 111A, a plurality of (two) connecting members 112, and a fixing member 113. As shown in FIG. 11, the antenna board 111A has a dielectric board 20, a plurality of antenna connection conductors 30, a plurality of power feeding wirings 40, a plurality of conductor portions 50, and a plurality of grounds, similarly to the antenna board 111. A conductor 61 and ground portions 62 and 63 are provided.

The communication circuit 12A performs wireless communication according to a predetermined communication standard by the antenna unit 11A. In this modification, the predetermined communication standard is Wi-Fi. The communication circuit 12A includes a transmission circuit 121A and a reception circuit 122A.

The transmission circuit 121A gives a high frequency signal to the antenna unit 11A in order to transmit a radio signal (radio wave) through the housing 110. More specifically, the transmission circuit 121A is configured to give a high frequency signal in a predetermined frequency band to the plurality of antenna connection conductors 30 through the plurality of power feeding wirings 40. In this modification, the predetermined frequency band includes the first frequency band and the second frequency band. The second frequency band is a frequency band having a higher frequency than the first frequency band. Specifically, the first frequency band is a frequency band near 2.4 GHz (2400 MHz to 2500 MHz) used for Wi-Fi, and the second frequency band is 5 GHz (5150 MHz to 5800 MHz) used for Wi-Fi. It is a frequency band in the vicinity. The transmission circuit 121A up-converts the signal to be transmitted to the device 200 into a high-frequency signal in the first frequency band or the second frequency band and gives it to the antenna unit 11A, and outputs a radio signal from the housing 110 as an antenna. Since a conventionally known configuration can be adopted as the transmission circuit 121A, detailed description thereof will be omitted.

The receiving circuit 122A receives a high frequency signal corresponding to the radio signal (radio wave) received by the housing 110 from the antenna unit 11A. More specifically, the receiving circuit 122A is configured to receive high frequency signals in a predetermined frequency band from the plurality of antenna connecting conductors 30 through the plurality of feeding wires 40. As described above, the predetermined frequency band includes the frequency band near 2.4 GHz (2400 MHz to 2500 MHz) (first frequency band) and the frequency band near 5 GHz (5150 MHz to 5800 MHz) (second frequency band) used for Wi-Fi. ) Is included in the frequency band. The receiving circuit 122A down-converts and outputs a high frequency signal in the first frequency band or the second frequency band received from the antenna unit 11. Since a conventionally known configuration can be adopted as the receiving circuit 122A, detailed description thereof will be omitted.

In this modification, as shown in FIG. 11, the antenna substrate 111A includes a plurality of (two in this modification) auxiliary conductors 70a and 70b (hereinafter, collectively referred to as reference numerals 70). Therefore, it is different from the antenna board 111. Also in this modification, the electric length of the conductor portion 50 is set to resonate in a frequency band (first frequency band) near 2.4 GHz (2400 MHz to 2500 MHz).

The two auxiliary conductors 70 are provided for improving the return loss in the two antennas realized by the housing 110. That is, the auxiliary conductor 70 is provided to enable wireless communication in a desired frequency band using the housing 110 as an antenna. The two auxiliary conductors 70 are formed in the second region 212 of the first surface 21 of the dielectric substrate 20. The auxiliary conductors 70 are arranged in the second region 212 at intervals in the second direction D20. In particular, the auxiliary conductors 70a and 70b are located on the third end 20c and the fourth end 20d side of the dielectric substrate 20 in the second region 212. The two auxiliary conductors 70a and 70b are connected to the two conductor portions 50a and 50b, respectively. The auxiliary conductors 70a and 70b have a shape symmetrical with respect to a straight line along the first direction D10 of the dielectric substrate 20. The electrical length of the auxiliary conductor 70 is determined according to the frequency at which the return loss is desired to be improved. The electrical length of the auxiliary conductor 70 is set to resonate in the second frequency band (frequency band near 5 GHz (5150 MHz to 5800 MHz)). In this modification, the auxiliary conductor 70 includes a feeding element 71, a non-feeding element 72, and reactance elements 73 and 74. The feeding element 71 and the non-feeding element 72 have a triangular shape in a plan view. The feeding element 71 and the non-feeding element 72 are arranged at predetermined intervals from each other. The feeding element 71 of the auxiliary conductors 70a and 70b is connected to the conductor portions 50a and 50b via the reactance element 73. The non-feeding element 72 of the auxiliary conductors 70a and 70b is connected to the ground conductors 611a and 611b via the reactance element 74. The auxiliary conductor 70 is formed by using, for example, aluminum (Al), copper (Cu), gold (Au), silver (Ag), and a metal containing an alloy thereof as a main component. Since the auxiliary conductor 70 can be formed by a conventionally known method, detailed description thereof will be omitted.

According to the first modification, the housing 110 can be used for wireless communication in a plurality of frequency bands (first frequency band and second frequency band).

The antenna module 10A of this modification uses Wi-Fi as a communication standard, and has a first frequency band (frequency band near 2.4 GHz) and a second frequency band (frequency band near 5 GHz) included in a predetermined frequency band. Use the high frequency signal of. The conductor portion 50 has an electric length that resonates in the first frequency band (frequency band near 2.4 GHz) included in the predetermined frequency band. The auxiliary conductor 70 has an electric length that resonates in a second frequency band (frequency band near 5 GHz) included in a predetermined frequency band. In order to confirm the effect of the auxiliary conductor 70 in the antenna module 10A of this modification, the return loss and the isolation were measured. The measurement of return loss and isolation was carried out for the antenna substrate 111A of this modification and the antenna substrate 111 of the above embodiment.

FIG. 12 shows the result of measuring the return loss of the antenna board 111A of the present modification, and FIG. 13 shows the result of measuring the return loss of the antenna board 111 of the above embodiment. Specifically, FIGS. 12 and 13 are graphs showing the frequency on the horizontal axis and the return loss on the vertical axis, and are displayed at a lower position as the return loss is larger, that is, at a lower position as the return loss is improved. To. The frequency range in which the return loss was measured is 2.0 GHz to 8.5 GHz. As is clear from FIGS. 12 and 13, according to the antenna substrate 111A of this modification, there is no significant change in the return loss in the vicinity of “Δ1”, “Δ2”, and “Δ3”, but “Δ4”, It was confirmed that the return loss was reduced in the vicinity of "Δ5", "Δ6", and "Δ7". In FIGS. 12 and 13, “Δ1”, “Δ2”, “Δ3”, “Δ4”, “Δ5”, “Δ6”, and “Δ7” are 2400, 2442, 2484, 5150, 5500, 5850, respectively. It is a point of 7125 MHz. In FIG. 12, the return losses at “Δ1”, “Δ2”, “Δ3”, “Δ4”, “Δ5”, “Δ6”, and “Δ7” are 10.982, 13.803, 8.256, and 9. It is 822, 10.434, 20.823, 15.892 dB. In FIG. 13, the return losses at “Δ1”, “Δ2”, “Δ3”, “Δ4”, “Δ5”, “Δ6”, and “Δ7” are 6.705, 17.776, 10.796, 7. It is 337, 3.264, 1.573, 1.910 dB.

FIG. 14 shows the result of measuring the isolation of the antenna board 111A of the present modification, and FIG. 15 shows the result of measuring the isolation of the antenna board 111 of the above embodiment. The frequency range in which the isolation was measured is 2.0 GHz to 8.5 GHz. As is clear from FIGS. 14 and 15, according to the antenna substrate 111A of this modification, the vicinity of “Δ1”, “Δ2”, “Δ3”, and “Δ4”, “Δ5”, “Δ6”, “Δ6”, “Δ4”, “Δ5”, “Δ6”, “Δ4”, “Δ5”, “Δ6”, “Δ1”, “Δ2”, “Δ3”. It was confirmed that there was no significant change in isolation in the vicinity of "Δ7". In FIGS. 14 and 15, “Δ1”, “Δ2”, “Δ3”, “Δ4”, “Δ5”, “Δ6”, and “Δ7” are 2400, 2442, 2484, 5150, 5500, 5850, respectively. It is a point of 7125 MHz. In FIG. 14, the isolations at “Δ1”, “Δ2”, “Δ3”, “Δ4”, “Δ5”, “Δ6”, and “Δ7” are 17.360, 17.948, 21.889, and 21. It is 645, 26.830, 28.780, 15.095 dB. In FIG. 15, the isolations at “Δ1”, “Δ2”, “Δ3”, “Δ4”, “Δ5”, “Δ6”, and “Δ7” are 16.228, 15.733, 18.543, 29. It is 086, 28.596, 27.887, 24.793 dB.

(2-2) Modification 2
Hereinafter, the antenna device 1B including the antenna module 10B of the second modification will be described with reference to FIGS. 16 and 17. The antenna module 10B includes an antenna unit 11B, a communication circuit 12A, and a sub communication circuit 13.

The antenna unit 11B includes an antenna substrate 111B, a plurality of (two) connecting members 112, and a fixing member 113. As shown in FIG. 17, the antenna board 111B has a dielectric board 20, a plurality of antenna connection conductors 30, a plurality of power feeding wirings 40, a plurality of conductor portions 50, and a plurality of grounds, similarly to the antenna board 111A. It includes a conductor 61, ground portions 62 and 63, and a plurality of auxiliary conductors 70.

In this modification, the antenna board 111B is different from the antenna board 111A in that the antenna board 111B includes the antenna conductor 80 and the ground portion 64.

The antenna conductor 80 is provided to enable wireless communication using the antenna conductor 80 as an antenna. In particular, the antenna conductor 80 corresponds to a frequency band that at least partially overlaps with the frequency band corresponding to the conductor portion 50. In this modification, the antenna conductor 80 is designed to resonate in the same frequency band as the conductor portion 50, that is, in a frequency band (first frequency band) near 2.4 GHz (2400 MHz to 2500 MHz). That is, the electric length of the antenna conductor 80 is set to resonate in a frequency band (first frequency band) near 2.4 GHz (2400 MHz to 2500 MHz). As shown in FIG. 17, the antenna conductor 80 is formed in the second region 212 of the first surface 21 of the dielectric substrate 20. The antenna conductor 80 is in the center of the second direction D20 in the second region 212. The antenna conductor 80 includes a plurality of antenna connection conductors 30, a plurality of power feeding wirings 40, a plurality of conductor portions 50, a plurality of ground conductors 61, ground portions 62 to 64, and a plurality of auxiliary conductors 70. Spatically separated. Therefore, improvement in isolation between the antenna conductor 80 and the housing 110 can be expected. In this modification, the antenna conductor 80 has a triangular shape in a plan view.

The ground portion 64 is provided as a ground for the antenna conductor 80. As shown in FIG. 17, the ground portion 64 is formed in the second region 212 of the first surface 21 of the dielectric substrate 20. The ground portion 64 extends from the center of the second direction D20 of the first portion 621 of the ground portion 62 toward the antenna conductor 80 side.

The antenna conductor 80 and the ground portion 64 are formed by using, for example, aluminum (Al), copper (Cu), gold (Au), silver (Ag), and a metal containing an alloy thereof as a main component. Since the antenna conductor 80 and the ground portion 64 can be formed by a conventionally known method, detailed description thereof will be omitted.

The sub-communication circuit 13 performs wireless communication according to a communication standard different from a predetermined communication standard (communication standard of the communication circuit 12) by the antenna unit 11B. The predetermined communication standard is Wi-Fi. A communication standard different from a predetermined communication standard is Bluetooth®. The sub-communication circuit 13 may be connected to the antenna board 111B by a single coaxial cable. When connecting the coaxial cable to the antenna board 111B, the inner conductor of the coaxial cable is connected to the antenna conductor 80, and the outer conductor is connected to the ground portion 64, respectively.

The sub-communication circuit 13 includes a transmission circuit 131 and a reception circuit 132.

The transmission circuit 131 supplies a high frequency signal in a predetermined frequency band to the antenna unit 11B in order to transmit a radio signal (radio wave) through the antenna conductor 80. The predetermined frequency band is a frequency band in which the antenna conductor 80 resonates (a frequency band near 2.4 GHz (2400 MHz to 2500 MHz) used for Bluetooth). The transmission circuit 131 up-converts the signal transmitted to the device 200 into a high-frequency signal and gives it to the antenna unit 11B, and outputs a radio signal from the antenna conductor 80. Since a conventionally known configuration can be adopted as the transmission circuit 131, detailed description thereof will be omitted.

The receiving circuit 132 receives a high frequency signal in a predetermined frequency band corresponding to the radio signal (radio wave) received by the antenna conductor 80 from the antenna unit 11B. As described above, the predetermined frequency band is the frequency band in which the antenna conductor 80 resonates. The receiving circuit 132 down-converts to a high frequency signal received from the antenna unit 11B and outputs the signal. Since a conventionally known configuration can be adopted as the receiving circuit 132, detailed description thereof will be omitted.

In the second modification, in addition to the wireless communication using the housing 110, the wireless communication using the antenna conductor 80 becomes possible. Here, the antenna conductor 80 resonates in a frequency band that at least partially overlaps with the frequency band in which the conductor portion 50 resonates. Therefore, according to the second modification, wireless communication with different communication standards becomes possible even in a frequency band in which at least a part thereof overlaps with each other.

(2-3) Modification 3
FIG. 18 shows the antenna board 111C of the antenna module 10C of the modification 3. The antenna substrate 111C is different from the antenna substrate 111 in that the antenna substrate 111 has a plurality of conductor portions 50, whereas the antenna substrate 111 has a single conductor portion 50. The communication circuit 12 of the above embodiment can be used for the antenna board 111C.

In the antenna substrate 111C, as shown in FIG. 18, the conductor portion 50 extends from the feeding wiring 40a and is spatially separated from the antenna connecting conductors 30a and 30b. The ground conductors 611a and 612a are located between the antenna connecting conductor 30a and the conductor portion 50, and are spatially separated from both the antenna connecting conductors 30a and 30b and the conductor portion 50.

As described above, it is not necessary for the conductor portion 50 to be connected to each of the plurality of power feeding wirings 40. If the conductor portion 50 is connected to at least one of the plurality of power feeding wirings 40, the effect of improving the isolation by the conductor portion 50 can be expected.

(2-4) Modification 4
FIG. 19 shows the antenna board 111D of the antenna module 10D of the modification 4. The antenna board 111D differs from the antenna board 111 in that it has a ground portion 62D having a shape different from that of the ground portion 62 of the antenna board 111. The communication circuit 12 of the above embodiment can be used for the antenna board 111D.

In the antenna substrate 111D, as shown in FIG. 19, the ground portion 62 includes a first portion 621, a pair of second portions 622a, 622b, and a third portion 623. The third portion 623 is formed in the second region 212 of the first surface 21 of the dielectric substrate 20. The third portion 623 extends from the center of the second direction D20 of the first portion 621 of the ground portion 62 to the second end 20b side of the dielectric substrate 20.

As described above, the ground such as the ground portion 62D can be arranged not only in the first region 211 but also in the second region 212. On the other hand, as in the modification 2 and the modification 3, the dielectric substrate 20 secures a region for arranging the auxiliary conductor 70 and the antenna conductor 80 by not providing the third portion 623 of the ground portion 62D. Will be possible. That is, the shape of the ground such as the ground portion 62D can be changed as appropriate.

(2-5) Modification 5
FIG. 20 shows the antenna board 111E of the antenna module 10E of the modification 5. The antenna board 111E is different from the antenna board 111 in that it has a plurality of (two) connection wirings 90a and 90b (hereinafter, collectively referred to as reference numerals 90). The communication circuit 12 of the above embodiment can be used for the antenna board 111E.

The connection wiring 90a connects the antenna connection conductor 30a and the ground portion 62. As shown in FIG. 20, the connection wiring 90a extends from the end portion 301 of the antenna connection conductor 30a along the second direction D20 and is connected to the first portion 621 of the ground portion 62. The width of the connection wiring 90a is narrower than the width of the power supply wiring 40a. The connection wiring 90b connects the antenna connection conductor 30b and the ground portion 62. As shown in FIG. 20, the connection wiring 90b extends from the end portion 301 of the antenna connection conductor 30b along the second direction D20 and is connected to the first portion 621 of the ground portion 62. The width of the connection wiring 90b is narrower than the width of the power supply wiring 40b.

The connection wirings 90a and 90b do not pass the AC component in the high frequency region such as the frequency band where the conductor portions 50a and 50b resonate, but have the characteristic of passing the DC component. Therefore, the connection wirings 90a and 90b do not electrically connect the ground portion 62 and the antenna connection conductors 30a and 30b for the AC component in the high frequency region, but the ground portion 62 and the antenna for the DC component. The connecting conductors 30a and 30b are electrically connected. Therefore, for the DC component, the antenna connecting conductors 30a and 30b form a ground together with the ground portion 62. Further, for direct current, the ground portion 62 is electrically connected to the housing 110 via the antenna connecting conductors 30a and 30b. Therefore, the ground can be stabilized with respect to other modules such as the device 100 on which the antenna module 10E is mounted.

The connection wiring 90 is formed by using, for example, aluminum (Al), copper (Cu), gold (Au), silver (Ag), and a metal containing an alloy thereof as a main component. Since the connection wiring 90 can be formed by a conventionally known method, detailed description thereof will be omitted.

The antenna board 111E may include only one of the two connection wires 90a and 90b. The connection wirings 90a and 90b may connect the power supply wirings 40a and 40b to the ground portion 63 instead of the ground portion 62. In this case, the connection wirings 90a and 90b may be through-hole wirings penetrating the dielectric substrate 20. Also in this case, the ground can be stabilized with respect to other modules such as the device 100 on which the antenna module 10E is mounted.

(2-5) Other Modifications In one modification, the antenna modules 10, 10A to 10E may have a plurality of antenna boards 111, 111A to 111E. The antenna modules 10 to 10E may have a plurality of communication circuits (communication circuits 12, 12A, sub-communication circuits 13).

In one modification, the shape of the dielectric substrate 20 is not particularly limited. The dielectric substrate 20 may have a circular shape (round shape, elliptical shape), a polygonal shape, or any other shape in a plan view.

In one modification, the shape of the antenna connecting conductor 30 is not particularly limited. The antenna connecting conductor 30 may have a circular shape (round shape, elliptical shape), a polygonal shape, or any other shape in a plan view. The number of antenna connecting conductors 30 is not limited to 2, and may be 3 or more.

In one modification, the shape of the power feeding wiring 40 is not particularly limited. The power feeding wiring 40 may have a shape that can be used as a feeding point. The number of power feeding wires 40 is not limited to 2, and may be 3 or more. In particular, the plurality of power feeding wires 40 may include at least one specific power feeding wiring 40. Here, the specific power supply wiring 40 refers to the power supply wiring 40 connected to at least one conductor portion 50. As in the above embodiment, the plurality of power supply wirings 40 may include a plurality of specific power supply wirings 40, and a plurality of conductor portions 50 may be connected to each of the plurality of specific power supply wirings 40.

In one modification, the electrical length of the conductor portion 50 is not limited to the electrical length that resonates in the frequency band near 2.4 GHz. The electrical length of the conductor portion 50 can be set to resonate in a desired frequency band. The desired frequency band may be a frequency band for which isolation is desired to be improved. The frequency band can be appropriately determined according to the communication standard of the wireless communication performed by using the housing 110. The conductor portion 50 may have an inverted F shape, a meander shape, or any other shape instead of an L shape in a plan view. The shape of the conductor portion 50 is not particularly limited as long as the electric length of the conductor portion 50 can resonate in the frequency band for which isolation is desired to be improved. Further, the conductor portion 50 may include a reactance element such as an inductor and a capacitor in order to adjust the electric length.

In one modification, the two ground conductors 61 (611,612) may not be provided for one conductor portion 50. The ground conductor 61 is located between the antenna connecting conductor 30 and the conductor portion 50 in the parallel direction in which the antenna connecting conductor 30 and the conductor portion 50 are lined up, and is spatially separated from both the antenna connecting conductor 30 and the conductor portion 50. Just do it.

In one modification, the shapes of the ground portions 62 and 62D are not particularly limited. The ground portions 62 and 62D may have at least the first portion 621. In one modification, the ground portions 62 and 62D are not essential.

In one modification, the ground portion 63 may also exist in a region overlapping the second region 212 on the second surface 22 of the dielectric substrate 20. For example, the ground portion 63 may be formed so as to cover the entire second surface 22 of the dielectric substrate 20. On the other hand, by limiting the region forming the ground portion 63 on the second surface 22 of the dielectric substrate 20, the second surface 22 corresponds to the auxiliary conductor 70 of the modified example 1 and the antenna conductor 80 of the modified example 2. It becomes possible to secure an area for arranging the elements. That is, the shape of the ground portion 63 can be changed as appropriate.

In one modification, the ground portion 64 is not essential. For example, a ground other than the ground portion 64 (ground conductor 61, ground portion 62, ground portion 63) can be used instead of the ground portion 64.

In one modification, the electrical length of the auxiliary conductor 70 is not limited to the electrical length that resonates in the frequency band near 5 GHz. The electrical length of the auxiliary conductor 70 can be set to resonate in a desired frequency band. The desired frequency band may be a frequency band for which return loss is desired to be improved. The shape and configuration of the auxiliary conductor 70 are also not particularly limited. The auxiliary conductor 70 does not have to include the non-feeding element 72. The auxiliary conductor 70 may have an L-shape, an inverted F-shape, a meander-shape, or any other shape in a plan view. The auxiliary conductor 70 may include a reactance element such as an inductor and a capacitor in order to adjust the electric length. The number of auxiliary conductors 70 is not particularly limited, and may be 1 or 3 or more. The auxiliary conductor 70 may be on the second surface 22 of the dielectric substrate 20.

In one modification, the electrical length of the antenna conductor 80 is not limited to the electrical length that resonates in the frequency band near 2.4 GHz (2400 MHz to 2500 MHz). The electrical length of the antenna conductor 80 can be set to resonate in a desired frequency band. The desired frequency band may be a frequency band for which wireless communication is desired by the antenna conductor 80. The shape and configuration of the antenna conductor 80 are not particularly limited, and may be L-shaped, inverted F-shaped, meander-shaped, or any other shape in a plan view. The antenna conductor 80 may include a reactance element such as an inductor and a capacitor in order to adjust the electric length. The number of antenna conductors 80 is not particularly limited, and may be 2 or more. The antenna conductor 80 may be on the second surface 22 of the dielectric substrate 20.

In one modification, the shape of the connecting member 112 is not particularly limited. The connecting member 112 may have a circular shape (round shape, elliptical shape), a polygonal shape, or any other shape in a plan view. However, it is preferable that the connecting member 112 has the same shape and size as the corresponding antenna connecting conductor 30 in a plan view. This can facilitate the flow of current between the antenna module 10 and the housing 110. It is preferable that the connecting member 112 does not come into contact with anything other than the corresponding antenna connecting conductor 30. The connecting member 112 may be a conductor such as an electric wire, instead of the rectangular plate shape as in the above embodiment. The number of connecting members 112 is not limited to 2, and may be 3 or more. The connecting member 112 is not essential. Therefore, the antenna connecting conductor 30 may be directly connected to the housing 110 or the fixing member 113.

In one modification, the shape of the fixing member 113 is not particularly limited. The fixing member 113 may have a circular shape (round shape, elliptical shape), a polygonal shape, or any other shape in a plan view. The number of fixing members 113 is not limited to 1, and may be 2 or more. The fixing member 113 is not essential. Therefore, the connecting member 112 may be directly connected to the housing 110.

In one modification, the communication circuit 12 does not necessarily have to include both the transmission circuit 121 and the reception circuit 122, but may include at least one of the transmission circuit 121 and the reception circuit 122. The communication standard of the communication circuit 12 is not limited to Wi-Fi, and can be selected from various communication standards such as wireless LAN, specific low power radio, and short-range wireless communication. This point is the same in the communication circuit 12A.

In one modification, the sub-communication circuit 13 does not necessarily have to include both the transmission circuit 131 and the reception circuit 132, but may include at least one of the transmission circuit 131 and the reception circuit 132. The sub-communication circuit 13 may be configured to execute at least one of transmission and reception of a high-frequency signal using the antenna conductor 80 with a communication standard different from the predetermined communication standard of the communication circuit 12. The communication standard of the sub-communication circuit 13 is not limited to Bluetooth, and can be selected from various communication standards such as wireless LAN, specific low power radio, and short-range wireless communication.

In one variant, the device 100 is not limited to televisions. The device 100 may have a housing having conductivity. Examples of the device 100 include a display device (monitor, projector, etc.), a sound device (speaker, sound bar, etc.), a lighting device, an air conditioner, a washing machine, a refrigerator, a cooking device (microwave oven, IH heating cooker), and a moving device. The body (vehicle, drone, etc.) can be mentioned.

(3) Aspects As is clear from the above embodiments and modifications, the present disclosure includes the following aspects. In the following, the reference numerals are given in parentheses only to clearly indicate the correspondence with the embodiment.

The first aspect is an antenna module (10; 10A; 10B; 10C; 10D; 10E), wherein the first and second antenna connecting conductors (30a, 30b) and the first and second feeding wires (40a, 40b), a conductor portion (50a), and a ground conductor (61,611a, 612a). The first and second antenna connecting conductors (30a, 30b) are electrically connected to the conductive housing (110) of the device (100). The first and second feeding wires (40a, 40b) are connected to the first and second antenna connecting conductors (30a, 30b), respectively. The conductor portion (50a) extends from the first power feeding wiring (40a). The conductor portion (50a) is spatially separated from the first and second antenna connecting conductors (30a, 30b). The ground conductor (61,611a, 612a) is located between the first antenna connecting conductor (30a) and the conductor portion (50a). The ground conductors (61,611a, 612a) are spatially separated from both the first and second antenna connecting conductors (30a, 30b) and the conductor portion (50a). According to this aspect, while the housing (110) of the device (100) can be used as a plurality of antennas, the isolation between the plurality of antennas can be improved.

The second aspect is the antenna module (10; 10A; 10B; 10C; 10D; 10E) based on the first aspect. In the second aspect, the first antenna connecting conductor (30a) and the conductor portion (50a) are arranged so that the first feeding wiring (40a) and the ground conductors (611a, 612a) are adjacent to each other. between. According to this aspect, while the housing (110) of the device (100) can be used as a plurality of antennas, the isolation between the plurality of antennas can be improved.

A third aspect is an antenna module (10; 10A; 10B; 10C; 10D; 10E) based on the first or second aspect. In the third aspect, the conductor portion (50a) has a longer electrical length than the first feeding wiring (40a). According to this aspect, while the housing (110) of the device (100) can be used as a plurality of antennas, the isolation between the plurality of antennas can be improved.

A fourth aspect is an antenna module (10; 10A; 10B; 10C; 10D; 10E) based on any one of the first to third aspects. In a fourth aspect, the antenna module (10; 10A; 10B; 10C; 10D) further comprises a dielectric substrate (20). The first and second antenna connecting conductors (30a, 30b), the first and second feeding wirings (40a, 40b), the conductor portion (50a), and the ground conductor (61,611a, 611b, 612a). , 612b) is on the surface (21) of the dielectric substrate (20) facing the housing (110). According to this aspect, while the housing (110) of the device (100) can be used as a plurality of antennas, the isolation between the plurality of antennas can be improved.

A fifth aspect is an antenna module (10; 10A; 10B; 10C; 10D; 10E) based on any one of the first to fourth aspects. In a fifth aspect, the antenna module (10; 10A; 10B; 10C; 10D) further comprises a communication circuit (12; 12A). The communication circuit (12; 12A) has at least one of a transmission circuit (121; 121A) and a reception circuit (122; 122A). The transmission circuit (121; 121A) gives a high frequency signal in a predetermined frequency band to the first and second antenna connecting conductors (30a, 30b) through the first and second feeding wirings (40a, 40b). The receiving circuit (122; 122A) receives a high frequency signal in the predetermined frequency band from the first and second antenna connecting conductors (30a, 30b) through the first and second feeding wirings (40a, 40b). According to this aspect, it is possible to improve the isolation between a plurality of antennas while enabling communication using the housing (110) of the device (100) as a plurality of antennas.

A sixth aspect is an antenna module (10; 10A; 10B; 10C; 10D; 10E) based on the fifth aspect. In the sixth aspect, the conductor portion (50, 50a, 50b) has an electric length that resonates in a frequency band included in the predetermined frequency band. According to this aspect, it is possible to improve the isolation between a plurality of antennas while enabling communication using the housing (110) of the device (100) as a plurality of antennas.

A seventh aspect is an antenna module (10A; 10B) based on the fifth or sixth aspect. In a seventh aspect, the antenna module (10A; 10B) comprises an auxiliary conductor (70; 70a; 70b) connected to the conductor portion (50, 50a, 50b). The predetermined frequency band includes a first frequency band and a second frequency band that are different from each other. The conductor portion (50, 50a, 50b) has an electric length that resonates in the first frequency band. The auxiliary conductors (70a, 70b) have an electric length that resonates in the second frequency band. According to this aspect, wireless communication in a plurality of frequency bands (first frequency band and second frequency band) is possible by using the housing (110).

The eighth aspect is the antenna module (10A; 10B) based on the seventh aspect. In the eighth aspect, the second frequency band is higher than the first frequency band. According to this aspect, wireless communication in a plurality of frequency bands (first frequency band and second frequency band) is possible by using the housing (110).

A ninth aspect is an antenna module (10; 10A; 10B; 10C; 10D; 10E) based on any one of the fifth to eighth aspects. In the ninth aspect, the communication circuit (12) executes wireless communication according to a predetermined communication standard. According to this aspect, wireless communication of the same communication standard is possible by a plurality of antennas.

The tenth aspect is the antenna module (10B) based on the ninth aspect. In a tenth aspect, the antenna module (10B) includes an antenna conductor (80) and a sub-communication circuit (13). The antenna conductor (80) resonates in a frequency band that at least partially overlaps with the frequency band in which the conductor portions (50, 50a, 50b) resonate. The sub-communication circuit (13) executes at least one of transmission and reception of a high-frequency signal using the antenna conductor (80) in a communication standard different from the predetermined communication standard. According to this aspect, wireless communication with different communication standards becomes possible even in a frequency band in which at least a part thereof overlaps with each other.

The eleventh aspect is the antenna module (10B) based on the tenth aspect. In the eleventh aspect, the antenna conductor (80) is physically separated from the first and second antenna connecting conductors (30, 30a, 30b). According to this aspect, improvement of isolation between the antenna conductor (80) and the housing (110) can be expected.

A twelfth aspect is an antenna module (10; 10A; 10B; 10C; 10D; 10E) based on any one of the first to eleventh aspects. In the twelfth aspect, the antenna module (10; 10A; 10B; 10C; 10D; 10E) has a ground portion (62) spatially separated from any of the first and second antenna connecting conductors (30a, 30b). , 63). According to this aspect, while the housing (110) of the device (100) can be used as a plurality of antennas, the isolation between the plurality of antennas can be improved.

A thirteenth aspect is an antenna module (10; 10A; 10B; 10C; 10D; 10E) based on the twelfth aspect. In the thirteenth aspect, the ground portion (62) is located between the first and second antenna connecting conductors (30a, 30b) and is spatially connected to any of the first and second antenna connecting conductors (30a, 30b). Includes a site (first site 621) separated from the antenna. According to this aspect, while the housing (110) of the device (100) can be used as a plurality of antennas, the isolation between the plurality of antennas can be improved.

The fourteenth aspect is the antenna module (10E) based on the twelfth or thirteenth aspect. In the fourteenth aspect, the antenna module (10E) includes a connection wiring (90a) for connecting the first antenna connection conductor (30a) and the ground portion (62, 63). The width of the connection wiring (90a) is narrower than the width of the first power feeding wiring (40a). According to this aspect, for this reason, the ground can be stabilized with respect to other modules such as the device (100) on which the antenna module (10E) is mounted.

A fifteenth aspect is an antenna module (10; 10A; 10B; 10C; 10D; 10E) based on any one of the first to fourteenth aspects. In the fifteenth aspect, the first power feeding wiring (40a) has a first end (401) and a direction in which the first antenna connecting conductor (30a) and the conductor portion (50) are aligned (first direction D10). It has a second end (402). The first antenna connecting conductor (30a) is connected to the first end (401). The conductor portion (50, 50a, 50b) is connected to the second end (402). According to this aspect, the conductor portion (50, 50a, 50b) is located on the opposite side of the feeding wiring (40, 40a, 40b) from the antenna connecting conductor (30, 30a, 30b). As a result, the influence of the capacitive component between the housing (110) and the antenna connecting conductor (30) on the conductor portions (50, 50a, 50b) can be expected to be reduced, and the isolation can be expected to be improved.

A sixteenth aspect is an antenna module (10; 10A; 10B; 10C; 10D; 10E) based on any one of the first to fifteenth aspects. A sixteenth aspect is a second conductor portion (50b) extending from the second feeding wiring (40b) and spatially separated from the second antenna connecting conductor (30b), and the second antenna connecting conductor (30b). A second ground between the conductor and the second conductor portion (50b), which is spatially separated from both the first and second antenna connecting conductors (30a, 30b) and the second conductor portion (50b). A conductor (61,611b, 612b) is provided. According to this aspect, while the housing (110) of the device (100) can be used as a plurality of antennas, the isolation between the plurality of antennas can be improved.

A seventeenth aspect is an antenna module (10; 10A; 10B; 10C; 10D) based on any one of the first to sixteenth aspects. In the seventeenth aspect, at least a part of the ground conductors (61,611a, 612a) is in a predetermined region (R1, R2). The predetermined regions (R1 and R2) include the conductor portion (50a), the first power feeding wiring (40a), the first antenna connecting conductor (30a), the conductor portion (50a), and the first antenna. This is a region surrounded by straight lines (S1, S2) connecting the ends (521, 522, 301, 302) of the connecting conductor (30a). According to this aspect, the influence of the capacitive component between the housing (110) and the antenna connecting conductor (30) on the conductor portion (50a) can be expected to be reduced, and the isolation can be expected to be improved.

The eighteenth aspect is the antenna device (1; 1A; 1B), and the antenna module (10; 10A; 10B; 10C; 10D; 10E) of any one of the first to seventeenth aspects and the housing. It comprises a body (110). According to this aspect, while the housing (110) of the device (100) can be used as a plurality of antennas, the isolation between the plurality of antennas can be improved.

The nineteenth aspect is an antenna device (1; 1A; 1B) based on the eighteenth aspect. In the nineteenth aspect, the antenna device (1; 1A; 1B) further comprises first and second connecting members (112a, 112b). The first and second connecting members (112a, 112b) are located between the first and second antenna connecting conductors (30a, 30b) and the housing (110), and the first and second antenna connecting conductors (112a, 112b) are located between the first and second antenna connecting conductors (30a, 30b) and the housing (110). 30a, 30b) are electrically connected to the housing (110), respectively. According to this aspect, the antenna module (10; 10A; 10B; 10C; 10D; 10E) can be easily connected to the housing (110) by the first and second connecting members (112a, 112b). ..

A twentieth aspect is an antenna device (1; 1A; 1B) based on the nineteenth aspect. In the twentieth aspect, the first and second connecting members (112a, 112b) have the same shape and the same size as the first and second antenna connecting conductors (30a, 30b) in a plan view. According to this aspect, the current flow between the antenna module (10; 10A; 10B; 10C; 10D; 10E) and the housing (110) can be promoted.

The 21st aspect is an antenna device (1; 1A; 1B) based on the 20th aspect. In the 21st aspect, the antenna device (1; 1A; 1B) is located between the first and second connecting members (112a, 112b) and the housing (110), and the first and second connecting members are provided. A fixing member (113) for fixing (112a, 112b) to the housing (110) and electrically connecting the (112a, 112b) is further provided. According to this aspect, the antenna module (10; 10A; 10B; 10C; 10D) can be easily fixed to the housing (110) by the fixing member (113).

The present invention is applicable to an antenna module and an antenna device. Specifically, the present invention is applicable to an antenna module for communicating using a plurality of antennas and an antenna device.

1,1A, 1B Antenna device 10,10A, 10B, 10C, 10D, 10E Antenna module 30, 30a, 30b Antenna connection conductor (first and second antenna connection conductors)
301, 302 Ends 40, 40a, 40b Power supply wiring (first and second power supply wiring)
401 1st end 402 2nd end 50, 50a, 50b Conductor part (1st and 2nd conductor part)
521,522 End 61 Ground Conductor (1st and 2nd Ground Conductors)
62,63 Ground part 621 First part (part)
70, 70a, 70b Auxiliary conductor 80 Antenna conductor 90, 90a, 90b Connection wiring 100 Equipment 110 Housing 112, 112a, 112b Connection member (first and second connection member)
113 Fixing member 12, 12A Communication circuit 121, 121A Transmission circuit 122, 122A Reception circuit 13 Sub communication circuit D10 1st direction D20 2nd direction R1, R2 Predetermined area S1, S2 Straight line

Claims (21)

The first and second antenna connecting conductors that are electrically connected to the conductive housing of the device,
The first and second feeding wirings connected to the first and second antenna connecting conductors, respectively,
A conductor portion extending from the first feeding wiring and spatially separated from the first and second antenna connecting conductors.
A ground conductor between the first antenna connecting conductor and the conductor portion, which is spatially separated from both the first and second antenna connecting conductors and the conductor portion.
To prepare
Antenna module. The first power feeding wiring and the ground conductor are located between the first antenna connecting conductor and the conductor portion so as to be adjacent to each other.
The antenna module according to claim 1. The conductor portion has a longer electrical length than the first power feeding wiring.
The antenna module according to claim 1 or 2. Further equipped with a dielectric substrate,
The first and second antenna connecting conductors, the first and second feeding wires, the conductor portion, and the ground conductor are on the surface of the dielectric substrate facing the housing.
The antenna module according to any one of claims 1 to 3. With more communication circuits
The communication circuit includes a transmission circuit that gives a high frequency signal of a predetermined frequency band to the first and second antenna connecting conductors through the first and second power feeding wiring, and the first and first feeding circuits through the first and second feeding wiring. 2 It has at least one of a receiving circuit that receives a high frequency signal in the predetermined frequency band from the antenna connecting conductor.
The antenna module according to any one of claims 1 to 4. The conductor portion has an electric length that resonates in a frequency band included in the predetermined frequency band.
The antenna module according to claim 5. Equipped with an auxiliary conductor connected to the conductor portion,
The predetermined frequency band includes a first frequency band and a second frequency band that are different from each other.
The conductor portion has an electric length that resonates in the first frequency band.
The auxiliary conductor has an electrical length that resonates in the second frequency band.
The antenna module according to claim 5 or 6. The second frequency band is higher than the first frequency band.
The antenna module according to claim 7. The communication circuit executes wireless communication according to a predetermined communication standard.
The antenna module according to any one of claims 5 to 8. An antenna conductor that resonates in a frequency band that at least partially overlaps with the frequency band in which the conductor portion resonates,
A sub-communication circuit that executes at least one of transmission and reception of a high-frequency signal using the antenna conductor with a communication standard different from the predetermined communication standard, and
To prepare
The antenna module according to claim 9. The antenna conductor is physically separated from the first and second antenna connecting conductors.
The antenna module according to claim 10. The antenna module includes a ground portion that is spatially separated from both the first and second antenna connecting conductors.
The antenna module according to any one of claims 1 to 11. The ground portion includes a portion between the first and second antenna connecting conductors and spatially separated from any of the first and second antenna connecting conductors.
The antenna module according to claim 12. A connection wiring for electrically connecting the first antenna connecting conductor and the ground portion is provided.
The width of the connection wiring is narrower than the width of the first power feeding wiring.
The antenna module according to claim 12 or 13. The first power feeding wiring has a first end and a second end in a direction in which the first antenna connecting conductor and the conductor portion are aligned.
The first antenna connecting conductor is connected to the first end and
The conductor portion is connected to the second end.
The antenna module according to any one of claims 1 to 14. A second conductor portion extending from the second feeding wiring and spatially separated from the second antenna connecting conductor,
A second ground conductor between the second antenna connecting conductor and the second conductor portion, which is spatially separated from both the first and second antenna connecting conductors and the second conductor portion.
To prepare
The antenna module according to any one of claims 1 to 15. At least a portion of the ground conductor is within a predetermined area and
The predetermined region is a region surrounded by the conductor portion, the first feeding wiring, the first antenna connecting conductor, and a straight line connecting the conductor portion and the end portions of the first antenna connecting conductor.
The antenna module according to any one of claims 1 to 16. The antenna module according to any one of claims 1 to 17.
With the above housing
To prepare
Antenna device. Further comprising first and second connecting members between the first and second antenna connecting conductors and the housing that electrically connect the first and second antenna connecting conductors to the housing, respectively.
The antenna device according to claim 18. The first and second connecting members have the same shape and size as the first and second antenna connecting conductors in a plan view.
The antenna device according to claim 19. A fixing member is further provided between the first and second connecting members and the housing to fix the first and second connecting members to the housing and to electrically connect the first and second connecting members.
The antenna device according to claim 20.

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