JP2003163529A - Headphone serving as diversity antenna - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a headphone serving as a diversity antenna formed of a plurality of antennas of a space diversity system, constituting a receiving system by connecting to a receiver. <P>SOLUTION: The headphone is provided with at least one speaker 3 connecting both a signal line for inputting audio signals receiving from a receiver 20 side and a GND signal line G1, at least two antennas A1, A2, and an antenna switchover circuit 2 for space diversity by adaptively switching or synthesizing the antenna output signals from each of antennas A1, A2. The antenna switchover circuit 2 outputs the antenna output signals having been adaptively switched or synthesized to the receiver 20 via the GND signal line G1. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving system for receiving a radio signal by a space diversity method using a plurality of antennas.

[0002]

2. Description of the Related Art In recent years, portable television receivers and F
2. Description of the Related Art Receiving devices such as M radio have become popular because they can be used while moving on a train or bus, such as during commuting. In such a receiving device used while moving, it is necessary to take measures against fading during reception in order to prevent transmission errors. Conventionally, there is known a space diversity method in which a plurality of antennas are arranged as a measure against fading and outputs of the respective antennas are adaptively switched or combined. Then, a receiving apparatus with improved reception performance is realized by performing reception processing by this space diversity method.

[0003]

However, the conventional receiving device has a problem that it is not suitable for portable use because the receiving device becomes large because it has a plurality of antennas. Therefore, there is also a method in which an external antenna is provided as needed, and a receiving system is configured by the external antenna and the receiving device. However, with an external antenna attached, it would still be large to carry,
It is inconvenient to carry. In addition, it may be troublesome for a user to carry an external antenna.

Therefore, if the headphone originally used in the receiving device or a device equipped with the receiving device can be used as an antenna, there will be no inconvenience when carrying it, and the problem that it is troublesome to carry an external antenna will be solved. be able to. For these reasons, it is desired to realize a diversity antenna headphone that includes a plurality of spatial diversity type antennas and can be connected to a receiving device to configure a receiving system.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a diversity antenna which is provided with a plurality of antennas of a space diversity system and which can be connected to a reception device to form a reception system. It is to provide dual-purpose headphones.

[0006]

In order to solve the above problems, the present invention provides at least one audio signal input signal line for receiving an audio signal from the receiving device side and a GND signal line. The antenna switching circuit includes a speaker, at least two antennas, and an antenna switching circuit that adaptively switches or combines the antenna output signals of the respective antennas to perform space diversity, and the antenna switching circuit is provided via the GND signal line. The antenna output signal after adaptively switching or combining is output to the receiving device (corresponding to the first embodiment). According to the present invention, the antenna output signals of at least two antennas are adaptively switched or combined to perform space diversity, and the antenna output signals obtained as a result are GN.
Output to the receiving device via the D signal line. With this, a plurality of antennas of the space diversity system are provided, and the receiving system can be configured by connecting to the receiving device.

According to the present invention, there is provided a first ear tip having the one speaker, a second ear tip, and a connecting means for connecting the first and second ear tips, and the antenna. Among them, at least one is provided in the connecting means (corresponding to the first embodiment). According to the present invention, the connecting portion of the earpiece connecting headphone is used as the antenna storing portion, or the connecting portion itself is used as the antenna. With this, it is possible to easily provide the space diversity type antenna by using the ear-plug connected headphone.

The present invention is characterized in that, of the antennas, the antenna not provided in the connecting means has a coil shape (corresponding to the first embodiment). According to the present invention, it is possible to adjust the antenna wire length of the antenna not included in the connecting means to be equal to the antenna wire length of the antenna included in the connecting means. This makes it possible to equalize the antenna wire lengths of the two antennas and perform space diversity with high accuracy.

According to the present invention, at least two speakers to which an audio signal input signal line for receiving an audio signal from the receiving device side and a GND signal line are respectively connected, and a GND signal line connected to the two speakers. Are connected to each other, and the antenna output signals input from these GND signal lines are
An antenna switching circuit that adaptively switches or combines to perform space diversity, and the antenna switching circuit outputs the antenna output signal after adaptively switching or combining to the receiving device via the GND signal line. Is output (corresponding to the second embodiment). According to the present invention, each GND signal line connected to at least two speakers is used as a plurality of antennas of the space diversity system. This eliminates the need for a separate antenna in the headphones. Also according to the present invention, it is possible to configure a receiving system by including a plurality of antennas of the space diversity system and connecting with the receiving device.

The present invention comprises at least two first filters which pass signals in the frequency band of the antenna output signal inputted from the GND signal line and cut off signals in the frequency band which may become noise. The antenna output signal input from each GND signal line passes through each of the first filters and is input to the antenna switching circuit (corresponding to the second embodiment). According to the invention, the at least two antenna output signals that have passed the first filter are
Since it is input to the antenna switching circuit, it is possible to perform space diversity with high accuracy in the antenna switching circuit.

The present invention is characterized in that the GND signal line connected to at least one of the two speakers has a coil shape (corresponding to the second embodiment). According to the present invention, the length of each GND signal line used as an antenna can be adjusted to make the antenna line lengths of the antennas equal. This makes it possible to equalize the antenna wire lengths of the plurality of antennas and perform space diversity with high accuracy.

According to the present invention, at least two speakers to which a voice signal input signal line for receiving a voice signal from the receiving device side and a GND signal line are respectively connected, and a voice signal input connected to the two speakers. And an antenna switching circuit for performing space diversity by adaptively switching or synthesizing antenna output signals input from these audio signal input signal lines, the antenna switching circuit comprising: The antenna output signal after adaptively switching or combining is output to the receiving device via a GND signal line (corresponding to the third embodiment). According to the present invention, each audio signal input signal line connected to at least two speakers is used as a plurality of antennas of the space diversity system. This eliminates the need for a separate antenna in the headphones. Also according to the present invention, it is possible to configure a receiving system by including a plurality of antennas of the space diversity system and connecting with the receiving device.

According to the present invention, at least two first filters are provided which pass signals in the frequency band of the antenna output signal input from the audio signal input signal line and cut off signals in the frequency band which may become noise. It is characterized in that the antenna output signal input from each of the audio signal input signal lines passes through each of the first filters and is input to the antenna switching circuit (corresponding to the third embodiment).
According to the present invention, at least two antenna output signals that have passed through the first filter are input to the antenna switching circuit after the signal that may become noise is removed, and the antenna switching circuit can accurately perform space diversity. It becomes possible to do.

The present invention comprises at least two second filters which pass signals in a frequency band including a voice signal and cut off at least signals in the frequency band of the antenna output signal, and are input to each of the speakers. The audio signal to be transmitted is input to each speaker after passing through each of the second filters (corresponding to the third embodiment). According to the present invention, it is possible to prevent a signal which may be noise in the space diversity processing of the antenna switching circuit from being output onto each audio signal input signal line used as an antenna. As a result, it becomes possible to accurately perform space diversity in the antenna switching circuit.

The present invention is characterized in that the audio signal input signal line connected to at least one of the two speakers has a coil shape (corresponding to the third embodiment). According to the present invention, the length of each audio signal input signal line used as an antenna can be adjusted to make the antenna line lengths of the antennas equal.
This makes it possible to equalize the antenna wire lengths of the plurality of antennas and perform space diversity with high accuracy.

The antenna switching circuit may output the antenna output signal after the adaptive switching or combination to the receiving device via the voice signal input signal line. Even in this case, a plurality of antennas of the space diversity system are provided, and the receiving system can be configured by connecting to the receiving device. Also, the G
Another antenna switching circuit for outputting the antenna output signal after adaptively switching or combining is provided to the receiving device via an ND signal line, and the antenna switching circuit is provided with any one of the plurality of other antenna switching circuits. If the antennas are connected to each other, two types of diversity antennas are provided, and two antenna output signals are transmitted to the receiving device by using the signal line for voice signal input and the GND signal line, and two headphones output two antennas. It can correspond to the receiving function (4th
Corresponding to the embodiment of).

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be sequentially described below with reference to the drawings. FIG. 1 is a headphone 1 which also serves as a diversity antenna according to a first embodiment of the present invention.
It is a block diagram which shows the structure of the receiving system which uses.
The receiving system shown in FIG. 1 is a television image receiving system including a headphone 1 also serving as a diversity antenna and a receiving device 20, and the receiving device 20 has a television image receiving function. In FIG. 1, the headphone 1 also serving as a diversity antenna has two antennas A1 and A2.
An antenna switching circuit 2, two speakers 3, a plug (not shown) for connecting to the headphone connection terminal portion J1 of the receiving device 20, and a power source for driving the antenna switching circuit 2 ( (Not shown). A battery such as a button battery can be used as this power source, and is desirable for portable use. Further, a solar cell may be provided and used in combination with a button cell. Each speaker 3 and the plug are connected by two signal lines for transmitting and inputting an audio signal to each speaker 3. Further, the antenna switching circuit 2, each speaker 3, and the plug are connected to the GND signal line G.
Connected by 1.

The receiver 20 comprises a receiver 21 having a television image receiving function, a headphone connection terminal J1 and the like. The receiving unit 21 includes a television tuner 31, a video circuit 32, and an audio circuit 33.
The headphone connection terminal portion J1 is an audio signal output terminal J1.
a, J1b and a GND signal terminal J1c. The audio signal output terminals J1a and J1b are connected to the audio circuit 33 by the audio output signal lines V1 and V2, and the audio signals for two channels output from the audio circuit 33 are respectively transmitted to the diversity antenna headphones 1. This is a terminal for outputting. These audio signal output terminals J1
The audio signals for two channels output from the audio circuit 33 are input to each speaker 3 via the plugs connected to a and J1b, and output as audio.

The GND signal terminal J1c is connected to the tuner 31 and the audio circuit 33 by a GND signal line G1 '. The GND signal line G1 ′ is grounded via the choke coil 22. The GND signal line G1 ′ is G
It will be connected to the GND signal line G1 of the headphone 1 which also serves as the diversity antenna, through the plug connected to the ND signal terminal J1c.

In the receiving system shown in FIG. 1, the antenna A1 in the headphone 1 which also serves as the diversity antenna is used.
Two antennas of the space diversity system are configured by A2. In the diversity antenna headphone 1, the outputs (antenna output signals) of the antennas A1 and A2 are input to the antenna switching circuit 2, and the antenna switching circuit 2 adaptively switches or combines the two input antenna output signals. Space diversity. After the two antenna output signals are selected or combined by the antenna switching circuit 2, the GND signal line G1
Is output to. The antenna output signal on the GND signal line G1 is transmitted to the GND signal line G1 ′ of the receiving device 20 via the plug and the GND signal terminal J1c, and input to the tuner 31.

Here, the GND signal line G1 'is grounded via the choke coil 22, but the choke coil 22 blocks high-frequency current in at least the frequency band of the antenna output signal. Therefore, the antenna output signal does not flow to the grounding part, and the tuner 3
It will be input to 1.

The tuner 31 performs television tuning using the input antenna output signal and outputs the tuned signal to the video circuit 32. Video circuit 3
2 restores a video signal using the video portion of this input signal and outputs it to a display (not shown). Also, the input signal is output to the audio circuit 33. The voice circuit 33 is
Using the audio portion of the input signal received from the video circuit 32, the audio signals for two channels are restored, and the signal lines V1, V
Output to 2. If the content of the audio signal included in the input signal is audio for one channel (monaural audio), the audio circuit 33 outputs the same audio signal to each signal line V.
1, output to V2. These audio signals are transmitted through the signal line V1,
V2 and audio signal output terminals J1a and J1b are output to the headphone 1 which also serves as a diversity antenna, and is output as audio from each speaker 3.

FIG. 5 is a block diagram for explaining an embodiment of the diversity antenna headphone 1 shown in FIG. The headphone 1 which also serves as the diversity antenna shown in FIG. 5 includes ear pads 51 and 52 each having a speaker 3 and a connecting part 53 which connects the ear pads 51 and 52. Note that the signal line connected to each speaker 3, the GND signal line G1, and the plug are omitted. In this embodiment, the antenna A1 is provided in the connecting portion 53, and the antenna A2 is provided in the earpiece portion 52. Further, the ear pads 52 have antennas A1 and A2.
The antenna switching circuit 2 to which is connected and a button battery (not shown) for driving the antenna switching circuit are also provided.

At the connecting portion 53, the ear pads 51, 52
When the connecting part for connecting the antenna is made of a material usable as an antenna element, the connecting part is connected to the antenna A.
It may be used as 1. Alternatively, an antenna element for the antenna A1 may be separately provided. Further, in the earpiece 52, the antenna A2 has a coil shape as illustrated in order to make the antenna length of the antenna A2 equal to the antenna length of the antenna A1 provided in the connecting portion 53. This makes it possible to equalize the antenna line lengths of the two antennas A1 and A2 and to perform space diversity with high accuracy.

It should be noted that the earpiece 51 is for stably mounting headphones that also serve as a diversity antenna, and may not have a speaker.

According to the first embodiment described above, the headphone is provided with two antennas and an antenna switching circuit, and the antenna switching circuit adaptively selects or combines the two antenna output signals by the space diversity method. ,
Since the antenna output signal after this selection or combination is output to the receiving device via the GND signal line, a plurality of antennas of the space diversity system are provided and the receiving system can be configured by connecting to the receiving device. Like

Next, FIG. 2 is a block diagram showing a configuration of a receiving system using the diversity antenna / headphone 40 according to the second embodiment of the present invention. This Figure 2
In FIG. 1, parts corresponding to the respective parts in FIG. The diversity antenna / headphone 40 shown in FIG. 2 uses the GND signal lines B1 and B2 connected to the speakers 3 as antennas, respectively. The GND signal line B1 is one high-pass filter (HPF) of the antenna output signal processing unit 10.
4 and the GND signal line G1. Further, the GND signal line B2 is connected to another HPF4 of the antenna output signal processing unit 10 and the GND signal line G1. HPF4
Cuts off a signal in a frequency band that passes a high-frequency television signal and may cause low-frequency noise. This allows
The two antenna output signals that have passed through the HPF 4 are input to the antenna switching circuit 2 after the signals that may be low-frequency noise are removed, and the antenna switching circuit 2 can accurately perform space diversity. .

Next, FIG. 3 is a block diagram showing the configuration of a receiving system using the diversity antenna / headphone 41 according to the third embodiment of the present invention. This Figure 3
In FIG. 1, the same reference numerals are given to the portions corresponding to the respective portions in FIGS. 1 and 2, and the description thereof will be omitted. The diversity antenna / headphone 41 shown in FIG. 3 uses the signal lines C1 and C2 for audio signal input, which are connected to the speakers 3, as antennas. The signal line C1 is
The antenna output signal processing unit 11 is connected to one HPF 4 and one low pass filter (LPF) 5. Further, the signal line C2 is connected to another HPF 4 and another LPF 5 of the antenna output signal processing unit 11. The audio signals for two channels, which are input via the audio signal output terminals J1a and J1b of the receiving device 20, are input to the respective LPFs 5.

The LPF 5 passes a signal in a frequency band including an audio signal, and cuts off a signal in a television signal frequency band which may be at least noise in space diversity processing. As a result, on the signal lines C1 and C2,
The output of a signal that may be noise in the space diversity processing of the antenna switching circuit 2 is prevented. Those signal lines C
The output signals of the antennas 1 and C2 are input to the antenna switching circuit 2 after passing through the HPF 4, and the antenna switching circuit 2
The space diversity is performed with high accuracy. Also,
The two audio signals that have passed through the LPF 5 are signal lines C1 and C.
It is input to each speaker 3 via 2 and output as voice.

FIG. 6 is a block diagram for explaining an embodiment of the diversity antenna / headphone 40 (, 41) shown in FIG. 2 (, FIG. 3). The diversity antenna headphone 40 (, 41) shown in FIG. 6 is
It is an earphone type headphone that does not have a connecting portion. In this diversity antenna / headphone 40 (, 41), the signal line B connected to one speaker 3 is used.
1 (, C1) is the antenna output signal processing unit 10 (, 11)
Connected to. The signal line B2 (, C2) connected to the other speaker 3 is also connected to the antenna output signal processing unit 1
0 (, 11), but the signal line B2 (, C2) is a coiled portion (coil-shaped portion 6).
1). The signal line B1 (, C1) and the signal line B2 (, C2) are bundled together by the bundle portion 62.

Generally, in the case of an earphone type headphone, in order to handle the signal line when the speaker is attached to the ear, the signal line connected to one speaker is more than the signal line connected to the other speaker. Is also getting longer.
Therefore, in the present embodiment, as shown in FIG.
By providing the antenna output signal processing unit 1
Each signal line B1 (, C from 0 (, 11) to the bundled line portion 62
1) and B2 (, C2) have the same length. And
Each signal line B1 (, C from the bundled wire portion 62 to each speaker 3)
1), the length of B2 (, C2) is apparently the signal line B1
The length of the signal line B2 (, C2) is adjusted by the coil-shaped portion 61 so that (, C1) is made longer than the signal line B2 (, C2) and the actual signal line length is made equal. As a result, the signal line B1 (, C1) and the signal line B2 (, C2) used as the two antenna lines are made equal in length while maintaining good operability of the signal line when using the earphone type headphones. Therefore, it becomes possible to perform space diversity with high accuracy.

According to the second and third embodiments described above,
Since the signal lines (audio signal input signal line or GND signal line) connected to the speaker are used as the antennas respectively, it is not necessary to separately provide an antenna in the headphones.

Next, FIG. 4 is a block diagram showing the configuration of a receiving system using the diversity antenna / headphone 42 according to the fourth embodiment of the present invention. This Figure 4
In FIG. 1, the same reference numerals are given to the portions corresponding to the respective portions in FIGS. 1 and 2, and the description thereof will be omitted. The diversity antenna / headphone 42 shown in FIG. 4 is provided with the antennas A1 and A2 shown in FIG. 1 and the antenna using the GND signal lines B1 and B2 shown in FIG. Further, the receiving circuit 100 includes a receiving unit 21 having a television (TV) image receiving function and a receiving unit 23 having an electronic mail receiving function.
It has and. The antennas A1 and A2 are antennas for the receiving unit 23, and the antennas using the GND signal lines B1 and B2 are antennas for the receiving unit 21.

The antenna switching circuit 2 for the antennas A1 and A2 outputs the antenna output signal to the signal line V2 'to which the voice signal is input from the receiving device 100. This signal line V
Reference numeral 2'is connected to the LPF 5, which cuts off at least a signal in the frequency band of the electronic mail data reception signal from the signal on the signal line V2 ', and allows the audio signal input from the receiving device 100 to pass therethrough. Reproduced by 3.

The signal line V2 'is connected to the signal line V2 of the receiving apparatus 100 via the audio signal output terminal J1b, and the antenna output signal on the signal line V2' is the signal line V2.
Is input to the HPF 4. The HPF 4 cuts off a signal in a frequency band including at least a voice signal, and allows a signal in a frequency band of the e-mail data reception signal to pass and be input to the reception unit 23. The receiving unit 23 uses this input signal to perform an electronic mail receiving process. As in the case of FIG. 2 described above, the receiving unit 21 includes the antenna output signal processing unit 10
The antenna output signal output to the GND signal line G1 from is input via the GND signal line G1 ′, and the television image receiving process is performed using the input antenna output signal.

FIG. 7 is a block diagram for explaining an embodiment of the diversity antenna / headphone 42 shown in FIG. The diversity antenna / headphone 42 shown in FIG. 7 is composed of ear pads 51 and 52 each having a speaker 3 and a connecting part 53 that connects the ear pads 51 and 52, as in FIG. To be done. The connecting portion 53 is provided with an antenna A1, and the earpiece portion 52 is provided with an antenna A2. The earpiece 52 includes the antenna switching circuit 2 for the antennas A1 and A2 and the LPF 5, and the output of the LPF 5 is connected to the speaker 3.

Further, as in the case of FIG. 6, the signal line B1 connected to the speaker 3 of the earpiece 51 and the signal line B2 connected to the speaker 3 of the earpiece 52 are bundled by a bundled portion 62. They are bundled and connected to the antenna output signal processing unit 10.
The signal line B2 has a coil-shaped portion 61, and the bundled wire portion 6
The length up to 2 is adjusted to be the same as the signal line B1.

According to the above-described fourth embodiment, the two types of diversity antennas are provided, and two antenna output signals are transmitted to the receiving device by using the voice signal input signal line and the GND signal line. So 2 with one headphone
One reception function (for example, a TV image reception function and an electronic mail reception function) can be supported.

Note that, in the above-described first to third embodiments, the antenna output signal may be transmitted to the receiving device using the audio signal input signal line, as in the fourth embodiment. .

Further, in the above-described embodiment, the diversity antenna headphone is provided with the driving power source such as the antenna switching circuit, but the receiving apparatus may supply the power source.

The above-mentioned receiving device may be configured as a single device by itself, or may be provided in another device. For example, PDA (Pe
rsonal Digital Assistants: personal information devices) and the like may be included in mobile terminals.

Further, the receiving device may have an FM radio receiving function, a mobile phone receiving function, a data receiving function in wireless data communication, etc., in addition to the above-mentioned television image receiving function or electronic mail receiving function. Good.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like within the scope not departing from the gist of the present invention. included.

[0044]

As described above, according to the present invention,
The antenna output signals of at least two antennas are adaptively switched or combined to perform space diversity, and the antenna output signals obtained as a result are output to the receiving device via the GND signal line. It is possible to configure a receiving system by including a plurality of antennas and connecting to a receiving device.

According to another aspect of the invention, since each GND signal line connected to at least two speakers is used as a plurality of antennas of the space diversity system, it is not necessary to separately provide an antenna inside the headphones. Also according to the present invention, it is possible to configure a receiving system by including a plurality of antennas of the space diversity system and connecting with the receiving device.

According to another aspect of the invention, since each audio signal input signal line connected to at least two speakers is used as a plurality of antennas of the space diversity system, it is necessary to separately provide an antenna in the headphones. Disappears. Also according to the present invention, it is possible to configure a receiving system by including a plurality of antennas of the space diversity system and connecting with the receiving device.

Further, the antenna output signal after adaptively switching or synthesizing may be output to the receiving device via the voice signal input signal line. Even in this case, a plurality of antennas of the space diversity system are provided, and the receiving system can be configured by connecting to the receiving device. Further, another antenna switching circuit for outputting the antenna output signal after adaptively switching or combining is provided to the receiving device via the GND signal line, and another plurality of antennas are connected to this antenna switching circuit. With this configuration, the two types of diversity antennas are provided, and the two antenna output signals are transmitted to the receiving device by using the voice signal input signal line and the GND signal line, and two reception functions (for example, one headphone) (for example, TV image reception function and e-mail reception function)
Can correspond to.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a receiving system using a diversity antenna / headphone 1 according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a reception system using a diversity antenna / headphone 40 according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a receiving system using a headphone 41 also serving as a diversity antenna according to a third embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a receiving system using a diversity antenna / headphones 42 according to a fourth embodiment of the present invention.

5 is a block diagram for explaining an embodiment of the diversity antenna / headphones 1 shown in FIG. 1. FIG.

FIG. 6 is a block diagram for explaining an example of the diversity antenna / headphone 40 (, 41) shown in FIG. 2 (, FIG. 3).

7 is a block diagram for explaining an example of the diversity antenna / headphones 42 shown in FIG. 4. FIG.

[Explanation of symbols]

1 (, 40, 41, 42) ... Diversity antenna / headphones, 2 ... Antenna switching circuit, 3 ... Speaker, 4
... high-pass filter (HPF), 5 ... low-pass filter (LPF), 10 (, 11) ... antenna output signal processing unit, 20 (, 100) ... receiving device, 21 (, 23) ... receiving unit, 22 ... choke coil, 31 ... Tuner, 32 ...
Image circuit, 33 ... Audio circuit, 51 (, 52) ... Ear pad, 53 ... Connection part, 61 ... Coil-shaped part, 62 ... Bundling part, A1 (, A2) ... Antenna, B1 (, B2, G1,
G1 ') ... GND signal line, C1 (, C2, V2') ... Audio signal input signal line, J1 ... Headphone connection terminal section, J
1a (, J1b) ... Audio signal output terminal, J1c ... GN
D signal terminal, V1 (, V2) ... Audio output signal line.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Koji Onishi             1-7 Aki, Otsuka-cho, Yukiya, Ota-ku, Tokyo             Su Electric Co., Ltd. (72) Inventor Eiji Onishi             1-7 Aki, Otsuka-cho, Yukiya, Ota-ku, Tokyo             Su Electric Co., Ltd. (72) Inventor Katsuyuki Furuguchi             1-7 Aki, Otsuka-cho, Yukiya, Ota-ku, Tokyo             Su Electric Co., Ltd. (72) Inventor Daisaku Umemoto             1-7 Aki, Otsuka-cho, Yukiya, Ota-ku, Tokyo             Su Electric Co., Ltd. (72) Inventor Toshitaka Kose             1-7 Aki, Otsuka-cho, Yukiya, Ota-ku, Tokyo             Su Electric Co., Ltd. (72) Inventor Hiroshi Noguchi             1-7 Aki, Otsuka-cho, Yukiya, Ota-ku, Tokyo             Su Electric Co., Ltd. (72) Inventor Ken Hamada             1-7 Aki, Otsuka-cho, Yukiya, Ota-ku, Tokyo             Su Electric Co., Ltd. F term (reference) 5J021 AA02 AA11 AA13 DB04 EA04                       FA32 HA05 HA06                 5J046 AA01 AA07 AA12 AB06 SA01                       SA04                 5K059 CC03 DD27 DD37 EE01

Claims (11)

[Claims] 1. At least one speaker to which a voice signal input signal line for receiving a voice signal from a receiving device side and a GND signal line are connected, at least two antennas, and an antenna output signal of each antenna. An antenna switching circuit that adaptively switches or combines to perform space diversity, and the antenna switching circuit outputs the antenna output after the adaptive switching or combining to the receiving device via the GND signal line. Headphones that also function as diversity antennas that output signals. 2. An antenna according to claim 1, further comprising: a first earrest portion including the one speaker, a second earrest portion, and a connecting unit connecting the first and second earrest portions, 2. The headphone that also serves as a diversity antenna according to claim 1, wherein at least one of the headphone and the headphone is provided in the connecting means. 3. The headphone that also serves as a diversity antenna according to claim 2, wherein an antenna that is not included in the connecting means, of the antennas, has a coil shape. 4. At least two speakers to which a voice signal input signal line for receiving a voice signal from the receiving device side and a GND signal line are respectively connected, and a GND signal line connected to the two speakers, respectively. An antenna switching circuit that is connected and performs spatial diversity by adaptively switching or combining antenna output signals input from these GND signal lines, wherein the antenna switching circuit receives the signals via the GND signal lines. A diversity antenna headphone which outputs an antenna output signal after the adaptive switching or combination to the device. 5. At least two first filters that pass signals in the frequency band of the antenna output signal input from the GND signal line and block signals in the frequency band that may become noise are provided, each of the GNDs 5. The diversity antenna headphone according to claim 4, wherein an antenna output signal input from a signal line passes through each of the first filters and is input to the antenna switching circuit. 6. The diversity antenna headphone according to claim 4, wherein the GND signal line connected to at least one of the two speakers has a coil shape. 7. An audio signal input signal connected to the two speakers, at least two speakers to which an audio signal input signal line for receiving an audio signal from the receiving device side and a GND signal line are respectively connected. An antenna switching circuit that connects each of the lines and adaptively switches or combines the antenna output signals input from the audio signal input signal lines to perform space diversity, wherein the antenna switching circuit is configured to perform the GND signal. A diversity antenna headphone that outputs the antenna output signal after the adaptive switching or combination to the receiving device via a line. 8. At least two first filters are provided, which pass a signal in a frequency band of an antenna output signal input from the audio signal input signal line and cut off a signal in a frequency band which may become noise. 8. The diversity antenna headphone according to claim 7, wherein an antenna output signal input from each of the audio signal input signal lines passes through each of the first filters and is input to the antenna switching circuit. 9. A second filter which passes a signal in a frequency band including an audio signal and cuts off at least a signal in a frequency band of the antenna output signal.
9. The headphone for dual use as a diversity antenna according to claim 7, wherein the audio signal input to each speaker is input to each speaker after passing through each of the second filters. . 10. The audio signal input signal line connected to at least one of the two speakers has a coil shape.
Headphones that also serve as a diversity antenna according to any one of items. 11. The antenna switching circuit outputs the antenna output signal after the adaptive switching or combination to the receiving device via the audio signal input signal line. 11. A headphone that also serves as a diversity antenna according to claim 10.