JP2016111573A - Antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna device comprising a decorative sheet installing an antenna in a plate-like part, capable of simplifying a structure of the plate-like part, while corresponding to a plurality of frequency bands.SOLUTION: An antenna which has a decorative sheet (2) mounted to a vehicle window frame, and in which a plurality of frequency bands that is difference each other is set as an operation band, comprises: an antenna (3) to be installed to a plate-like part (2a) of the decorative sheet (2); a co-axial cable (4) that is one co-axial cable as a common transmission path of a signal of the plurality of frequency band, and of which at least one part is installed into the plate-like part (2a); and a signal separation circuit (5) that separates the signal of the plurality of frequency bands from the co-axial cable (4) into two or more signals having a different frequency band each other, and that is separated from the decorative sheet (2) or installed into a part (2b) other than the plate-like part of decorative sheet (2).SELECTED DRAWING: Figure 3

Description

  The present invention relates to an antenna device for a vehicle, for example.

  A vehicle or the like is equipped with many transmission / reception devices such as a radio, a television, a GPS, and various communication terminal devices, and an antenna device connected to these transmission / reception devices. Patent Document 1 discloses a configuration in which an antenna is provided on a plate-like portion of a decorative panel for a vehicle window frame.

JP 2014-171059 A (published September 18, 2014)

  In-vehicle antenna devices are required to support a plurality of frequency bands (for example, a frequency band for communication such as LTE and a frequency band for broadcasting such as radio), but the plate-like portion has a plurality of frequency bands. If a plurality of corresponding antennas are formed separately, the number of cables connected to the antennas increases, and there is a problem that the configuration of the plate-like portion becomes complicated.

  One of the objects of the present invention is to simplify the configuration of a plate-like portion while enabling the correspondence to a plurality of frequency bands in an antenna device provided with a decorative plate incorporating an antenna in the plate-like portion. is there.

  The antenna device includes a decorative plate mounted on a vehicle window frame, an antenna having a plurality of different frequency bands as operating bands, an antenna built in a plate-like portion of the decorative plate, and the plurality of frequencies. A coaxial cable that is a common transmission line for signals in a band, and at least a part of the coaxial cable is embedded in the plate-like portion, and signals in a plurality of frequency bands from the coaxial cable are mutually A signal separation circuit for separating two or more different signals, the signal separation circuit being separate from the decorative plate, or built in a portion other than the plate-like portion of the decorative plate; It is characterized by that.

  According to the above configuration, since only one antenna and one coaxial cable are required, it is possible to cope with a plurality of frequency bands, and compared with the case where a plurality of antennas and a plurality of coaxial cables are provided, The configuration can be simplified. This facilitates the molding of the plate-like portion and its automation.

  In addition, since one antenna is commonly used in a plurality of frequency bands, the antenna area per frequency band is widened, and sensitivity can be increased in each frequency band as compared with the above case.

  The antenna and the coaxial cable may be directly connected or may be connected via a planar transmission line such as a microstrip line or a coplanar line.

  In this antenna apparatus, it can also be set as the structure by which the balun attached to the said coaxial cable was incorporated in parts other than the said plate-shaped part of the said decorative board.

  In the above configuration, since there is only one coaxial cable, it is sufficient to provide one set of baluns. Compared with the case where a plurality of antennas and a plurality of coaxial cables are provided, the configuration of the extending portion can be simplified. The molding can be facilitated.

  In the antenna device, the signal separation circuit includes a communication circuit that selectively passes a signal in a communication frequency band, and a broadcast circuit that selectively passes and amplifies a signal in a broadcast frequency band. It can also be set as the structure containing these.

  According to the above configuration, it is possible to realize an antenna device that can handle both communication signals (for example, LTE signals) and broadcast signals (DAB signals).

  In the present antenna device, the signal separation circuit selectively passes a first broadcast frequency band signal and selectively amplifies the first broadcast circuit and the second broadcast frequency band signal. It is also possible to include a second broadcast circuit that passes and amplifies.

  According to the above configuration, it is possible to realize an antenna device that can handle both the first broadcast signal (for example, FM signal) and the second broadcast signal (for example, AM signal).

  The antenna device may be configured such that the connection between the communication circuit and the other device and the connection between the broadcast circuit and the other device are performed by a single relay cable.

  According to the above configuration, the antenna device and other devices can be easily connected.

  The antenna device may be configured such that the connection between the first broadcast circuit and the other device and the connection between the second broadcast circuit and the other device are performed by one relay cable.

  According to the above configuration, the antenna device and other devices can be easily connected.

  In the antenna device, the signal separation circuit includes a communication circuit that selectively passes a signal in a communication frequency band, and a first signal that selectively passes and amplifies a signal in a first broadcast frequency band. A configuration including a broadcast circuit and a second broadcast circuit that selectively passes and amplifies a signal in the frequency band for the second broadcast may be employed.

  According to the above configuration, it is possible to realize an antenna device that can handle both communication signals (for example, LTE signals) and first broadcast signals (for example, FM signals) and second broadcast signals (for example, AM signals). Can do.

  In this antenna device, the communication circuit and other devices are connected, the first broadcast circuit and other devices are connected, and the second broadcast circuit and other devices are connected by a single relay cable. It can also be configured.

  According to the above configuration, the antenna device and other devices can be easily connected.

  In this antenna device, the communication circuit and the other device are connected by a single relay cable, and the connection of the first broadcasting circuit and the other device and the connection of the second broadcasting circuit and the other device are performed. It can also be set as the structure performed by another one relay cable.

  According to the above configuration, it is possible to prevent a communication signal from the relay cable (a signal opposite to the signal from the antenna) from adversely affecting the first and second broadcast circuits.

  In the antenna device, the broadcast circuit may be configured to block signals other than the broadcast frequency band from the one relay cable.

  According to the above configuration, it is possible to prevent a communication signal from the relay cable (a signal opposite to the signal from the antenna) from adversely affecting the broadcasting circuit.

  In the antenna apparatus, the first broadcast circuit blocks signals other than the first broadcast frequency band from the one relay cable, and the second broadcast circuit is disconnected from the one relay cable. It can also be set as the structure which interrupts | blocks signals other than the frequency band for 2nd broadcasting.

  According to the above configuration, it is possible to prevent a communication signal from the relay cable (a signal opposite to the signal from the antenna) from adversely affecting the first and second broadcast circuits.

  In the antenna device, the communication circuit may include a filter circuit, and the broadcast circuit may include a filter circuit and an amplifier circuit.

  According to the above configuration, the communication circuit and the broadcast circuit can be easily configured.

  In the antenna device, the broadcasting circuit may include an amplifier circuit, a filter circuit provided in the previous stage of the amplifier circuit, and a filter circuit provided in the subsequent stage of the amplifier circuit.

  According to the above configuration, the communication circuit and the broadcast circuit (prevention) having a function of preventing the adverse effect of the communication signal from the relay cable can be easily configured.

  In the present antenna device, the communication circuit may be configured such that bidirectional input is performed in the downstream direction from the antenna and in the upstream direction toward the antenna.

  According to the above configuration, the antenna device can be used for bidirectional communication.

  In the present antenna device, the signal separation circuit may be configured separately from the decorative plate.

  According to the said structure, the structure of a decorative board can be simplified.

  In this antenna apparatus, one of the plurality of frequency bands may be configured to be an AM broadcast frequency band.

  Since AM broadcasting is a low frequency band and requires an antenna area, the advantage of this antenna device that the antenna area per frequency band is widened is effective.

  According to the present invention, it is possible to simplify the configuration of the plate-like portion while making it possible to cope with a plurality of frequency bands.

It is a perspective view which shows the external appearance of the vehicle which attaches this antenna apparatus. It is a top view which shows the structure of the door of the vehicle shown in FIG. (A) And (b) is a block diagram of this antenna apparatus. (A)-(c) is a block diagram which shows the structure of the antenna apparatus of Embodiment 1. FIG. (A)-(c) is a block diagram which shows another structure of the antenna apparatus of Embodiment 1. FIG. (A)-(d) is a block diagram which shows the structure of the antenna apparatus of Embodiment 2. FIG. (A)-(d) is a block diagram which shows another structure of the antenna apparatus of Embodiment 2. FIG. (A)-(d) is a block diagram which shows the further another structure of the antenna apparatus of Embodiment 2. FIG. (A)-(d) is a block diagram which shows the structure of the antenna apparatus of Embodiment 3. FIG. (A)-(d) is a block diagram which shows another structure of the antenna device of Embodiment 3. FIG. (A)-(d) is a block diagram which shows the further another structure of the antenna device of Embodiment 3. FIG. (A)-(c) is a block diagram which shows the structure of the antenna apparatus of Embodiment 4. FIG. (A)-(c) is a block diagram which shows another structure of the antenna device of Embodiment 4. FIG. (A)-(c) is a block diagram which shows the further another structure of the antenna device of Embodiment 4. FIG. (A)-(c) is a block diagram which shows the structure of the antenna apparatus of Embodiment 5. FIG.

  An embodiment of the present invention will be described with reference to FIGS. In the following description, a direction (z-axis direction in FIG. 1) corresponding to the vertical direction (vertical direction) of the vehicle is referred to as “vertical direction”.

  FIG. 1 is a perspective view showing an appearance of a vehicle 30 to which the antenna device is attached, and FIG. 2 is a plan view showing a configuration of a door 31 in FIG. As shown in FIGS. 1 and 2, the door 31 of the vehicle 30 includes a door body 35, a window frame 36 disposed on the upper portion of the door body 35, a window glass 39 accommodated in the window frame 36, and a window frame. And a decorative plate 2 mounted on 36 pillars (vertical columns) 36p. The decorative plate 2 includes a plate-like portion 2a and an extending portion 2b that extends downward (from the ground) from the lower end of the plate-like portion 2a and is thicker than the plate-like portion 2a. The plate-like portion 2a is attached to the outside of the pillar 36p, and at this time, the extended portion 2b is stored in the door body 35. That is, the plate-like portion 2a is an exposed portion, and the extended portion 2b is an unexposed portion.

  FIG. 3A and FIG. 3B are configuration diagrams of the present antenna device. As shown in FIG. 2 and FIG. 3, the antenna device 10 is an antenna having an operating band having a plurality of frequency bands different from the decorative plate 2 attached to the window frame 36, and a plate-like portion of the decorative plate 2. An antenna 3 built in 2a, a coaxial cable that is a common transmission path for signals in the plurality of frequency bands, and a coaxial cable 4 that is at least partially built in the plate-like portion 2a, and a coaxial cable 4 is a signal separation circuit that separates a plurality of frequency band signals from 4 into two or more signals having different frequency bands, and is separate from the decorative board 2 as shown in FIG. As shown in FIG. 3 (b), a signal separation circuit 5 is provided in a stretched portion 2 b that is a portion other than the plate-like portion 2 a of the decorative plate 2, and the coaxial cable 4 is connected to the stretched portion 2 b of the decorative plate 2. Built-in balun 6 ing. The balun 6 functions as a balanced-unbalanced converter and reduces the influence of the coaxial cable 4 on the antenna characteristics. For the balun 6, for example, a ferrite element is used.

  Here, the antenna 3, the coaxial cable 4, and the balun 6 are integrally formed with the decorative plate 2. The plurality of frequency bands are, for example, a frequency band for LTE (Long Term Evolution) and a frequency band for DAB (Digital Audio Broadcast), a frequency band for LTE, a frequency band for AM broadcasting, and the like. It may be a frequency band for FM broadcasting.

  Examples of the effects of the antenna device 10 include the following.

  First, since only one antenna 3 and one coaxial cable 4 are required, the configuration of the plate-like portion 2a is possible as compared with the case where a plurality of antennas and a plurality of coaxial cables are provided while being able to cope with a plurality of frequency bands. Can be simplified. This facilitates the molding of the plate-like portion 2a and its automation. In addition, since the plate-shaped part 2a is an exposed part of the decorative board 2, a beautiful appearance is required. If the configuration of the plate-like portion 2a is complicated, it may be difficult to mold (automatic molding) without losing aesthetics or aesthetics.

  Further, since the number of the coaxial cables 4 is one, it is only necessary to provide one set of baluns 6. Compared with the above case, the configuration of the extended portion 2b can be simplified and the forming of the extended portion 2b is facilitated. be able to.

  Furthermore, since one antenna 3 is commonly used in a plurality of frequency bands, the antenna area for each frequency band is increased, and each frequency band (especially, a low frequency band such as AM broadcasting) is compared with the above case. Can increase sensitivity.

[Embodiment 1]
4A is a configuration diagram of the antenna device 10 according to the first embodiment, and FIGS. 4B and 4C are circuit diagrams illustrating a configuration example of the signal separation circuit 5 in FIG. 4A. It is. The antenna 3 in FIG. 4 has an LTE frequency band and a DAB frequency band as operating bands, and the signal separation circuit 5 in FIG.

  As shown in FIG. 4 (a), the signal separation circuit 5 selectively passes a communication circuit 5a that passes a signal in the LTE frequency band, a signal in the DAB frequency band, and The communication circuit 5a is connected to the other device 21 (for example, an LTE tuner) via the relay cable 11x, and the broadcast circuit 5b is connected to the other device via the relay cable 11y. 22 (for example, a DAB tuner). The relay cables 11x and 11y are coaxial cables.

  In the example of FIG. 4B, the communication circuit 5a includes a high-pass filter 5x, and the broadcast circuit 5b includes an amplifier 5g and a low-pass filter 5z disposed on the preceding stage (input side of the amplifier 5g). The coaxial cable 4 and the relay cable 11x are connected via the high-pass filter 5x, the coaxial cable 4 and the input end of the amplifier 5g are connected via the low-pass filter 5z, and the output end of the amplifier 5g is connected to the relay cable 11y. Connected.

  Thereby, the LTE signal received by the antenna 3 passes through the high-pass filter 5x from the coaxial cable 4 (blocked by the low-pass filter 5z), is sent to the relay cable 11x, and reaches the other device 21. Further, the LTE signal from the other device 21 is transmitted from the antenna 3 via the relay cable 11x, the high-pass filter 5x, and the coaxial cable 4. On the other hand, the DAB signal received by the antenna 3 passes through the low-pass filter 5z (cut off by the high-pass filter 5x), is amplified by the amplifier 5g, is sent to the relay cable 11y, and reaches the other device 22. As shown in FIG. 4C, the broadcast circuit 5b may be provided with a low-pass filter amplifier 5zg having both functions of a low-pass filter and an amplifier.

  According to the antenna device 10 of FIG. 4, it is possible to realize an antenna device that can handle LTE signals and DAB signals.

  In FIG. 4, the signal separation circuit 5 is separated from the decorative board 2, but is not limited thereto. FIG. 5A is another configuration diagram of the antenna device 10 according to the first embodiment, and FIGS. 5B and 5C are circuits showing a configuration example of the signal separation circuit 5 in FIG. FIG. The antenna 3 of FIG. 5 uses the frequency band for LTE and the frequency band for DAB as the operation band, and the signal separation circuit 5 of FIG. 5 is built in the extended portion 2b (portion other than the plate-like portion 2a) of the decorative board 2. Has been.

  The connection relationship between the communication circuit 5a and the coaxial cable 4 and the relay cable 11x, the connection relationship between the broadcast circuit 5b and the coaxial cable 4 and the relay cable 11y, and the configurations of the communication circuit 5a and the broadcast circuit 5b are as follows. This is the same as FIG. 4B and FIG.

  According to the antenna device 10 of FIG. 5, since the signal separation circuit 5 is built in the decorative plate 2, the separated LTE signal and DAB signal can be directly extracted from the decorative plate 2. Thereby, the process of installing the signal separation circuit 5 separately can be omitted.

[Embodiment 2]
6A is a configuration diagram of the antenna device 10 according to the second embodiment, and FIGS. 6B to 6D are circuit diagrams illustrating a configuration example of the signal separation circuit 5 of FIG. 6A. It is. The antenna 3 of FIG. 6 has an LTE frequency band and a DAB frequency band as operating bands, and the signal separation circuit 5 of FIG.

  As shown in FIG. 6 (a), the signal separation circuit 5 selectively passes a communication circuit 5a that passes a signal in the LTE frequency band, a signal in the DAB frequency band, and Each of the communication circuit 5a and the broadcast circuit 5b is connected to another device 23 (for example, an LTE / DAB tuner) via the relay cable 12. The relay cable 12 is a single coaxial cable.

  In the example of FIG. 6B, the communication circuit 5a includes a high-pass filter 5x, and the broadcast circuit 5b includes an amplifier 5g and a low-pass filter 5z disposed in the preceding stage (the input side of the amplifier 5g). The coaxial cable 4 and the relay cable 12 are connected via the high-pass filter 5x, the coaxial cable 4 and the input end of the amplifier 5g are connected via the low-pass filter 5z, and the output end of the amplifier 5g is connected to the relay cable 12. Connected.

  As a result, the LTE signal received by the antenna 3 passes through the high-pass filter 5 x (cut off by the low-pass filter 5 z) from the coaxial cable 4, is sent to the relay cable 12, and reaches the other device 23. Further, the LTE signal from the other device 23 is transmitted from the antenna 3 through the relay cable 12, the high-pass filter 5 x and the coaxial cable 4. On the other hand, the DAB signal received by the antenna 3 passes through the low-pass filter 5z (cut off by the high-pass filter 5x), is amplified by the amplifier 5g, is sent to the relay cable 12, and reaches the other device 23.

  According to the antenna device 10 of FIG. 6, only one relay cable 12 is required, and there is an advantage that a connection process with another device 23 is easy. In addition, although the LTE signal and the DAB signal are respectively sent to the relay cable 12, since the amplitudes of the two differ depending on the amplifier 5g, there is no problem in the separation state of the two.

  As shown in FIG. 6C, the LTE signal from the relay cable 12 is provided by providing a low-pass filter 5Z that blocks the LTE signal from the relay cable 12 between the output terminal of the amplifier 5g and the relay cable 12. Can be prevented from adversely affecting the operation of the amplifier 5g.

  Further, as shown in FIG. 6D, the broadcast circuit 5b may be provided with a low-pass filter amplifier 5zg having both functions of a low-pass filter and an amplifier.

  In FIG. 6, the signal separation circuit 5 is separated from the decorative board 2, but is not limited thereto. FIG. 7A is another configuration diagram of the antenna device 10 according to the second embodiment, and FIGS. 7B to 7D are circuits showing a configuration example of the signal separation circuit 5 in FIG. 7A. FIG. The antenna 3 in FIG. 7 uses the LTE frequency band and the DAB frequency band as operating bands, and the signal separation circuit 5 in FIG. 7 is built in the extended portion 2b (portion other than the plate-like portion 2a) of the decorative board 2. Has been.

  The connection relationship between the communication circuit 5a and the coaxial cable 4 and the relay cable 12, the connection relationship between the broadcast circuit 5b and the coaxial cable 4 and the relay cable 12, and the configurations of the communication circuit 5a and the broadcast circuit 5b are as follows. This is the same as FIG. 6B to FIG.

  According to the antenna device 10 of FIG. 7, since the signal separation circuit 5 is built in the decorative plate 2, the separated LTE signal and DAB signal can be directly extracted from the decorative plate 2. Thereby, the process of installing the signal separation circuit 5 separately can be omitted.

  FIG. 8A is still another configuration diagram of the antenna device 10 according to the second embodiment, and FIGS. 8B to 8D show configuration examples of the signal separation circuit 5 in FIG. 7A. It is a circuit diagram. The antenna 3 of FIG. 8 uses the LTE frequency band and the DAB frequency band as operating bands, and the signal separation circuit 5 of FIG. 8 is built in the extended portion 2b (portion other than the plate-like portion 2a) of the decorative plate 2. Has been. The extending portion 2b of the decorative board 2 incorporates an Ethernet interface 8 for converting the signal received by the antenna 3 into a digital signal. The LTE signal and the DAB signal converted into a digital signal are transferred to another device by the Ethernet cable 13. 24. The Ethernet interface 8 and the Ethernet cable 13 are devices compatible with Ethernet (registered trademark).

  The connection relationship between the communication circuit 5a and the coaxial cable 4 and the input end of the Ethernet interface 8, the connection relationship between the broadcast circuit 5b and the coaxial cable 4 and the input end of the Ethernet interface 8, the communication circuit 5a and the broadcast circuit. The configuration of each of 5b is the same as that shown in FIGS. 6 (b) to 6 (d).

  According to the antenna device 10 of FIG. 8, since the signal separation circuit 5 and the Ethernet interface 8 are built in the decorative plate 2, there is an advantage that the LTE signal and the DAB signal converted into digital signals can be directly extracted from the decorative plate 2.

[Embodiment 3]
FIG. 9A is a configuration diagram of the antenna device 10 according to the third embodiment, and FIGS. 9B to 9D are circuit diagrams illustrating a configuration example of the signal separation circuit 5 in FIG. 9A. It is. The antenna 3 of FIG. 9 has an LTE frequency band, an FM broadcast frequency band, and an AM broadcast frequency band as operating bands, and the signal separation circuit 5 of FIG.

  As shown in FIG. 9 (a), the signal separation circuit 5 selectively passes the communication frequency circuit 5a for the LTE frequency band signal and the FM frequency band signal, A communication circuit 5a and a first broadcasting circuit 5c including a first broadcasting circuit 5c that amplifies and a second broadcasting circuit 5d that selectively passes and amplifies signals in the frequency band for AM broadcasting. Each of the second broadcasting circuits 5d is connected to another device 25 (for example, LTE / FM / AM tuner) via the relay cable 14. The relay cable 14 is a single coaxial cable.

  In the example of FIG. 9B, the communication circuit 5a includes a high-pass filter 5x, and the first broadcast circuit 5c includes an amplifier 5j and a band-pass filter 5y disposed in the preceding stage (the input side of the amplifier 5j). In addition, the second broadcast circuit 5d includes an amplifier 5g and a low-pass filter 5z disposed in the preceding stage (the input side of the amplifier 5g). The coaxial cable 4 and the relay cable 14 are connected via the high-pass filter 5x, the coaxial cable 4 and the input end of the amplifier 5j are connected via the band-pass filter 5y, and the output end of the amplifier 5j is connected to the relay cable 14 The coaxial cable 4 and the input end of the amplifier 5g are connected via a low-pass filter 5z, and the output end of the amplifier 5g is connected to the relay cable 14.

  Thereby, the LTE signal received by the antenna 3 passes through the high-pass filter 5x from the coaxial cable 4 (cut off by the band-pass filter 5y and the low-pass filter 5z), is sent to the relay cable 14, and reaches the other device 25. The LTE signal from the other device 25 is transmitted from the antenna 3 via the relay cable 14, the high pass filter 5 x and the coaxial cable 4. The FM signal received by the antenna 3 passes through the band-pass filter 5y (cut off by the high-pass filter 5x and the low-pass filter 5z), is amplified by the amplifier 5j, is sent to the relay cable 14, and reaches the other device 25. . The AM signal received by the antenna 3 passes through the low-pass filter 5z (cut off by the high-pass filter 5x and the band-pass filter 5y), is amplified by the amplifier 5g, is sent to the relay cable 14, and reaches the other device 25. .

  According to the antenna device 10 of FIG. 9, it is possible to realize an antenna device that can handle LTE signals, FM signals, and AM signals. Further, only one relay cable 14 is required, and there is an advantage that a connection process with another device 25 is easy. Note that although the LTE signal, the FM signal, and the AM signal are respectively sent to the relay cable 14, the amplitudes of the amplifier 5j and the amplifier 5g are different, so that there is no problem in the separation state of these signals.

  As shown in FIG. 9C, a band-pass filter 5Y that blocks the LTE signal from the relay cable 14 is provided between the output end of the amplifier 5j and the relay cable 14, and the output end of the amplifier 5g and the relay cable are provided. 14 is provided with a low-pass filter 5Z that blocks the LTE signal from the relay cable 14, so that the LTE signal from the relay cable 14 does not adversely affect the operation of the amplifier 5j and the amplifier 5g. .

  Further, as shown in FIG. 9 (d), the first broadcast circuit 5c is provided with a bandpass filter amplifier 5yj having both functions of a bandpass filter and an amplifier, and the second broadcast circuit 5d is provided with a lowpass filter and an amplifier. A low-pass filter amplifier 5zg having the above functions may be provided.

  In FIG. 9, the signal separation circuit 5 is separated from the decorative board 2, but is not limited thereto. FIG. 10A is another configuration diagram of the antenna device 10 according to the third embodiment. FIGS. 10B to 10D are circuits showing a configuration example of the signal separation circuit 5 in FIG. FIG. The antenna 3 in FIG. 10 uses the LTE frequency band, the FM broadcast frequency band, and the AM broadcast frequency band as operating bands, and the signal separation circuit 5 in FIG. It is built in (parts other than the part 2a).

  The connection relationship between the communication circuit 5a and the coaxial cable 4 and the relay cable 14, the connection relationship between the first broadcast circuit 5c and the coaxial cable 4 and the relay cable 14, and the second broadcast circuit 5d and the coaxial cable 4 and the relay. The connection relationship with the cable 14 and the configurations of the communication circuit 5a, the first broadcast circuit 5c, and the second broadcast circuit 5d are the same as those in FIGS. 9B to 9D.

  According to the antenna device 10 of FIG. 10, since the signal separation circuit 5 is built in the decorative plate 2, the separated LTE signal, FM signal, and AM signal can be directly extracted from the decorative plate 2. Thereby, the process of installing the signal separation circuit 5 separately can be omitted.

  FIG. 11A is still another configuration diagram of the antenna device 10 according to the third embodiment, and FIGS. 11B to 11D show configuration examples of the signal separation circuit 5 in FIG. It is a circuit diagram. The antenna 3 in FIG. 11 uses the LTE frequency band, the FM broadcast frequency band, and the AM broadcast frequency band as operating bands, and the signal separation circuit 5 in FIG. It is built in (parts other than the part 2a). The extending portion 2b of the decorative board 2 incorporates an Ethernet interface 8 that converts the signal received by the antenna 3 into a digital signal. The LTE signal, the FM signal, and the AM signal converted into a digital signal are transmitted to the Ethernet cable 15. Is sent to the other device 26.

  The connection relationship between the communication circuit 5a and the coaxial cable 4 and the input end of the Ethernet interface 8, the connection relationship between the first broadcast circuit 5c and the coaxial cable 4 and the input end of the Ethernet interface 8, and the second broadcast circuit 5d. 9B, FIG. 9D, and FIG. 9D show the connection relationship between the coaxial cable 4 and the input end of the Ethernet interface 8, and the configurations of the communication circuit 5a, the first broadcast circuit 5c, and the second broadcast circuit 5d. Is the same.

  According to the antenna device 10 of FIG. 11, the signal separation circuit 5 and the ether interface 8 are built in the decorative board 2, so that the LTE signal, the FM signal, and the AM signal converted into digital signals from the decorative board 2 can be directly extracted. There is.

[Embodiment 4]
12A is a configuration diagram of the antenna device 10 according to the fourth embodiment, and FIGS. 12B and 12C are circuit diagrams illustrating a configuration example of the signal separation circuit 5 in FIG. 12A. It is. The antenna 3 in FIG. 12 has an LTE frequency band, an FM broadcast frequency band, and an AM broadcast frequency band as operating bands, and the signal separation circuit 5 in FIG.

  As shown in FIG. 12 (a), the signal separation circuit 5 selectively passes the communication frequency circuit 5a for the LTE frequency band signal and the FM frequency band signal, And a first broadcast circuit 5c that amplifies and a second broadcast circuit 5d that selectively passes and amplifies signals in the frequency band for AM broadcast, and the communication circuit 5a is connected via the relay cable 16x. The first broadcast circuit 5c and the second broadcast circuit 5d are connected to the other device 28 (for example, FM / AM tuner) via the relay cable 16y, connected to the other device 27 (for example, LTE tuner). The The relay cable 16x and the relay cable 16y are coaxial cables.

  In the example of FIG. 12B, the communication circuit 5a includes a high-pass filter 5x, and the first broadcast circuit 5c includes an amplifier 5j and a band-pass filter 5y disposed in the preceding stage (input side of the amplifier 5j). In addition, the second broadcast circuit 5d includes an amplifier 5g and a low-pass filter 5z disposed in the preceding stage (the input side of the amplifier 5g). The coaxial cable 4 and the relay cable 16x are connected via the high-pass filter 5x, the coaxial cable 4 and the input end of the amplifier 5j are connected via the band-pass filter 5y, and the output end of the amplifier 5j is connected to the relay cable 16y. The coaxial cable 4 and the input end of the amplifier 5g are connected via a low-pass filter 5z, and the output end of the amplifier 5g is connected to the relay cable 16y.

  Thereby, the LTE signal received by the antenna 3 passes through the high-pass filter 5x from the coaxial cable 4 (cut off by the band-pass filter 5y and the low-pass filter 5z), is sent to the relay cable 16x, and reaches the other device 27. The LTE signal from the other device 27 is transmitted from the antenna 3 through the relay cable 16x, the high-pass filter 5x, and the coaxial cable 4. The FM signal received by the antenna 3 passes through the band-pass filter 5y (cut off by the high-pass filter 5x and the low-pass filter 5z), is amplified by the amplifier 5j, is sent to the relay cable 16y, and reaches the other device 28. . The AM signal received by the antenna 3 passes through the low-pass filter 5z (cut off by the high-pass filter 5x and the band-pass filter 5y), is amplified by the amplifier 5g, is sent to the relay cable 16y, and reaches the other device 28. .

  According to the antenna device 10 of FIG. 12, an antenna device that can handle LTE signals, FM signals, and AM signals can be realized. Further, by providing two relay cables (16x and 16y) separately, it is possible to prevent the LTE signal from adversely affecting the FM signal and the AM signal. The FM signal and the AM signal are respectively sent to the relay cable 16y. However, since the amplitudes of the amplifier 5j and the amplifier 5g are different, there is no problem in the separation state of these signals.

  In FIG. 12, the signal separation circuit 5 is separated from the decorative board 2, but is not limited thereto. FIG. 13A is another configuration diagram of the antenna device 10 according to the fourth embodiment, and FIGS. 13B and 13C are circuits showing a configuration example of the signal separation circuit 5 in FIG. FIG. The antenna 3 in FIG. 13 uses the LTE frequency band, the FM broadcast frequency band, and the AM broadcast frequency band as operating bands, and the signal separation circuit 5 in FIG. It is built in (parts other than the part 2a).

  The connection relationship between the communication circuit 5a and the coaxial cable 4 and the relay cable 16x, the connection relationship between the first broadcast circuit 5c and the coaxial cable 4 and the relay cable 16y, and the second broadcast circuit 5d and the coaxial cable 4 and the relay. The connection relationship with the cable 16y, and the configurations of the communication circuit 5a, the first broadcast circuit 5c, and the second broadcast circuit 5d are the same as those in FIGS. 12B and 12C.

  According to the antenna device 10 of FIG. 13, since the signal separation circuit 5 is built in the decorative plate 2, the separated LTE signal, FM signal, and AM signal can be directly extracted from the decorative plate 2. Thereby, the process of installing the signal separation circuit 5 separately can be omitted.

  FIG. 14A is still another configuration diagram of the antenna device 10 according to the fourth embodiment, and FIGS. 14B and 14C show a configuration example of the signal separation circuit 5 of FIG. It is a circuit diagram. The antenna 3 of FIG. 14 uses the LTE frequency band, the FM broadcast frequency band, and the AM broadcast frequency band as operating bands, and the signal separation circuit 5 of FIG. It is built in (parts other than the part 2a). The extending portion 2b of the decorative board 2 incorporates an Ethernet interface 8 that converts a signal received by the antenna 3 into a digital signal, and the LTE signal, the FM signal, and the AM signal converted into a digital signal are transmitted to the Ethernet cable 17. Is sent to the other device 29.

  The connection relationship between the communication circuit 5a and the coaxial cable 4 and the input end of the Ethernet interface 8, the connection relationship between the first broadcast circuit 5c and the coaxial cable 4 and the input end of the Ethernet interface 8, and the second broadcast circuit 5d. 12B and FIG. 12C show the connection relationship between the coaxial cable 4 and the input end of the Ethernet interface 8, the communication circuit 5a, the first broadcast circuit 5c, and the second broadcast circuit 5d. Is the same.

  According to the antenna device 10 of FIG. 14, since the signal separation circuit 5 and the ether interface 8 are built in the decorative board 2, it is possible to directly extract the LTE signal, the FM signal, and the AM signal from the decorative board 2. There is.

[Embodiment 5]
FIG. 15A is a configuration diagram of the antenna device 10 according to the fifth embodiment. FIGS. 15B and 15C are circuit diagrams illustrating a configuration example of the signal separation circuit 5 in FIG. It is. The antenna 3 of FIG. 15 uses the frequency band for FM broadcasting and the frequency band for AM broadcasting as operating bands, and the signal separation circuit 5 of FIG.

  As shown in FIG. 15 (a), the signal separation circuit 5 includes a first broadcast circuit 5c that selectively passes and amplifies signals in the frequency band for FM broadcasting, and signals in the frequency band for AM broadcasting. And a second broadcast circuit 5d that selectively passes and amplifies the first broadcast circuit 5c and the second broadcast circuit 5d via the relay cable 18 to the other device 28 (for example, FM / AM tuner). The relay cable 18 is a coaxial cable.

  In the example of FIG. 15B, the first broadcast circuit 5c includes an amplifier 5j and a band-pass filter 5y disposed in the preceding stage (the input side of the amplifier 5j), and the second broadcast circuit 5d includes an amplifier 5g and a low-pass filter 5z disposed in the preceding stage (input side of the amplifier 5g). The coaxial cable 4 and the input end of the amplifier 5j are connected via a bandpass filter 5y, the output end of the amplifier 5j is connected to the relay cable 18, and the coaxial cable 4 and the input end of the amplifier 5g are connected to the low-pass filter 5z. The output end of the amplifier 5g is connected to the relay cable 18.

  As a result, the FM signal received by the antenna 3 passes through the band-pass filter 5y (cut off by the low-pass filter 5z), is amplified by the amplifier 5j, is sent to the relay cable 18, and reaches the other device 28. The AM signal received by the antenna 3 passes through the low-pass filter 5z (cut off by the band-pass filter 5y), is amplified by the amplifier 5g, is sent to the relay cable 18, and reaches the other device 28.

  According to the antenna device 10 of FIG. 15, an antenna device that can handle FM signals and AM signals can be realized. The FM signal and the AM signal are respectively sent to the relay cable 18. However, since the amplitudes of the amplifier 5j and the amplifier 5g are different, there is no problem in the separation state of these signals.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  The present invention can be used, for example, as an antenna device for a vehicle.

2 decorative plate 2a plate-like portion 2b extended portion 3 antenna 4 coaxial cable 5 signal separation circuit 5a communication circuit (for example, for LTE)
5b Broadcast circuit (eg for DAB)
5c First broadcast circuit (for example, for FM)
5d Second broadcast circuit (for example, for AM)
5g ・ 5j amplifier (amplifier circuit)
5x high-pass filter (filter circuit)
5y bandpass filter (filter circuit)
5z low-pass filter (filter circuit)
6 Balun 8 Ether interface 11x / 11y / 12/14 / 16x / 16y 18 Relay cable 21-29 Other devices 30 Vehicle 31 Door 35 Door body 36 Window frame 36p Pillar (vertical column of window frame)
39 Window glass

Claims (16)

A decorative board mounted on the vehicle window frame;
An antenna having a plurality of frequency bands different from each other as an operating band, and an antenna built in the plate-like portion of the decorative board;
A coaxial cable that is a common transmission path for signals in the plurality of frequency bands, and at least a part of the coaxial cable is built in the plate-shaped portion;
A signal separation circuit for separating a plurality of frequency band signals from the coaxial cable into two or more signals having different frequency bands, and is separate from the decorative board, or the plate shape of the decorative board An antenna device comprising: a signal separation circuit built in a portion other than the portion.   The antenna device according to claim 1, wherein a balun attached to the coaxial cable is incorporated in a portion other than the plate-like portion of the decorative plate.   The signal separation circuit includes a communication circuit that selectively passes a signal in a communication frequency band, and a broadcast circuit that selectively passes and amplifies a signal in a broadcast frequency band. The antenna device according to claim 1 or 2.   The signal separation circuit selectively passes and amplifies a first broadcast frequency band signal and a first broadcast frequency band signal and a second broadcast frequency band signal and amplifies. The antenna apparatus according to claim 1, further comprising a second broadcasting circuit.   4. The antenna device according to claim 3, wherein the communication circuit and the other device are connected to each other and the broadcasting circuit and the other device are connected by a single relay cable.   5. The antenna device according to claim 4, wherein the connection between the first broadcasting circuit and the other device and the connection between the second broadcasting circuit and the other device are made by one relay cable.   The signal separation circuit includes: a communication circuit that selectively passes a signal in a communication frequency band; a first broadcast circuit that selectively passes and amplifies a signal in a first broadcast frequency band; 3. The antenna apparatus according to claim 1, further comprising a second broadcast circuit that selectively passes and amplifies a signal in a frequency band for the second broadcast.   The connection of the communication circuit and the other device, the connection of the first broadcasting circuit and the other device, and the connection of the second broadcasting circuit and the other device are performed by one relay cable. The antenna device according to claim 7.   The communication circuit and the other device are connected by a single relay cable, and the connection of the first broadcast circuit and the other device is different from the connection of the second broadcast circuit and the other device. The antenna apparatus according to claim 7, wherein the antenna apparatus is a relay cable.   6. The antenna device according to claim 5, wherein the broadcasting circuit blocks a signal other than the frequency band for broadcasting from the one relay cable.   The first broadcast circuit blocks a signal other than the frequency band for the first broadcast from the one relay cable, and the second broadcast circuit is for the second broadcast from the one relay cable. The antenna device according to claim 8, wherein a signal other than the frequency band is cut off.   6. The antenna device according to claim 3, wherein the communication circuit includes a filter circuit, and the broadcast circuit includes a filter circuit and an amplifier circuit.   11. The antenna device according to claim 10, wherein the broadcasting circuit includes an amplifier circuit, a filter circuit provided in a previous stage of the amplifier circuit, and a filter circuit provided in a subsequent stage of the amplifier circuit.   14. The communication circuit according to any one of claims 3, 5, and 7 to 13, wherein bidirectional input is performed in a downstream direction from the antenna and in an upstream direction toward the antenna. The antenna device described.   The antenna device according to claim 1, wherein the signal separation circuit is separate from the decorative board. 16. The antenna apparatus according to claim 1, wherein one of the plurality of frequency bands is an AM broadcast frequency band.

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