JPH0888609A - Received wave re-transmitter - Google Patents

Abstract

PURPOSE: To surely receive (listen to) a broadcast content by a receiver without the generation of a beat tone in the case of retransmission of a medium wave broadcast or the like in a tunnel, in a subway or an underground market or the like. CONSTITUTION: A reception antenna 11 receives a broadcast radio wave Wa, an optical transmission I/F section 12 applies photoelectric conversion to the received signal and the result is outputted to a receiver 14 via an optical cable 13. The receiver 14 selects a broadcast wave with one prescribed or plural frequencies from a received signal. An optical transmission I/F section 14b applies photoelectric conversion again to the selected received signal and the result is sent to a transmitter 16 via an optical cable 15. The transmission signal obtained by applying the photoelectric conversion to the optical received signal by the processor reception I/F section 16a is sent to a termination resistor 20 from a leakage cable 19 through a coaxial cable 17 and a matching device 18. A broadcast radio wave Wb whose frequency is the same as that of the received wave is sent again from the leakage cable 19 in a tunnel, a subway or an underground market or the like.

Description

Detailed Description of the Invention

[0001]

The present invention relates to AM (medium wave) broadcasting, F
The present invention relates to a received wave retransmitting device that is used for M broadcasting, TV (television) broadcasting, a mobile telephone system, etc., and retransmits the received wave in a deaf area (weak electric field area) such as in a tunnel, in a subway, or in a building underground mall. .

[0002]

2. Description of the Related Art In recent tunnels, subways, underground buildings, etc., the reception condition (electric field strength) of broadcast waves, for example, medium waves (AM), is poor. And on the ground in the building underground mall, it receives the medium-wave broadcasting and retransmits this received wave in the tunnel, in the subway, and in the building underground mall by weak radio waves (same frequency), enabling good reception at this place. There is.

In such a broadcast wave retransmitting device, a desired broadcast wave of one or a plurality of frequencies is selected from the received broadcast waves, and the radio frequency (RF) signal is directly used as a weak radio wave in a tunnel. There is an RF system that retransmits in the deaf area, inside the subway, and in the building underground mall. In addition, the selected broadcast wave is down-converted to an intermediate frequency band (IF), and this IF signal is transmitted to the hearing-impaired area in the tunnel, subway, and underground building of the building, and up-converted to the frequency of the received wave. There is an IF method of retransmitting. Furthermore, the selected broadcast wave is down-converted to an intermediate frequency band (IF) and further demodulated (detected).
An AF system is known in which an F signal is transmitted to a hearing-impaired area in a tunnel, a subway, and an underground shopping area of a building, is modulated by the AF signal, and is up-converted to a reception broadcast frequency and re-transmitted.

FIG. 9 is a block diagram showing the structure of a conventional broadcast wave retransmission apparatus. In this example, the broadcast wave is retransmitted by the RF system, for example. In FIG. 9, a receiving antenna 1 for receiving the medium wave broadcast radio wave Wa and a coaxial cable (metallic cable) 2 for transmitting a received signal from the receiving antenna 1 are provided. Further, a tuning circuit such as a bandpass filter is provided, and a broadcast wave of a predetermined one wave or a plurality of frequencies is selected from a reception signal transmitted by the coaxial cable 2 through a tuning circuit such as a bandpass filter (BPF). Receiver 3
And are provided.

Further, the coaxial cable 4 for transmitting the reception signal from the receiving device 3 and the reception signal (one wave or each broadcast wave of a plurality of frequencies) from the coaxial cable 4 are set to a predetermined power, for example, weak. To send as radio waves,
Transmitting device 5 for converting to the same frequency as the received signal and transmitting it
And a coaxial cable 6 for transmitting a transmission signal from the transmitter 5. Further, a matching device 7 for performing impedance matching between the transmission device 5 and the load, and a transmission signal from the matching device 7 as a radio wave Wb in the tunnel,
A leaky cable 8 for re-transmitting in a subway, an underground shopping mall in a building, and the like, and an output end of the transmitter 5, a load of the leaky cable 8, and a terminating resistor 9 having a impedance matched value are provided.

Next, the operation of this conventional example will be described. The receiving antenna 1 receives the broadcast wave Wa in the medium wave band,
This received signal is input to the receiving device 3 through the coaxial cable 2. From the received signal, the receiving device 3 selects a predetermined one wave or each broadcast wave of a plurality of frequencies. The received signal from the receiving device 3 is transmitted through the coaxial cable 4 to the transmitting device 5
, And the received signal (one wave or each broadcast wave of a plurality of frequencies) is converted into a predetermined electric power and transmitted.
For example, a weak radio wave transmission signal is transmitted through the coaxial cable 6. This transmission signal is impedance-matched by the matching device 7 and is sent from the leaking cable 8 to the terminating resistor 9. At this time, the leaked cable 8 is retransmitted as a broadcast wave Wb of one wave or a plurality of frequencies selected by the receiving device 3 in the tunnel, the subway, and the underground building.

As described above, even in the conventional broadcast wave retransmitting apparatus,
Medium-wave broadcasts can be received well in tunnels, subways, underground shopping malls, etc. where the impression (field strength) is poor.

[0008]

However, in the broadcast wave retransmitting device of the above-mentioned conventional example, the transmission signal from the transmitting device 5 leaks from the coaxial cable 6 as a radio wave, and this radio wave is received from the receiving antenna 1 to the receiving device, respectively. Go around 3. In this case, the radio wave leaked from the coaxial cable 6 has a relatively high electric field strength and re-enters the receiving antenna 1 and the receiving device 3 by multiple propagation (multipath) due to diffused reflection, so that the received broadcast is received. A phase difference occurs with the radio wave Wa. Further, the transmission signal from the transmission device 5 leaks and is transmitted to the reception device 3 through the coaxial cable 4, and a phase difference is generated between the signal and the received broadcast radio wave Wa. For this reason, there has been a drawback that a beat sound is generated in a receiver that receives the broadcast radio wave Wb, and the broadcast content cannot be reliably heard.

For this reason, the coaxial cables 2 and 4 are inserted into a metal tube or embedded in the ground to perform a severe shield. In this case, the laying work and the burying work are troublesome. Also, this RF
Regardless of the method, the IF method and the AF method have similar problems, and a signal is reflected by an impedance mismatch (mismatch) at the input end of the transmission device 5 or the like and is transmitted to a signal (traveling wave) to be transmitted. As a result, a phase difference occurs, and in this case as well, a beat sound is generated in the receiver, and there is a drawback that the broadcast content cannot be reliably heard.

The present invention solves the above-mentioned drawbacks in the prior art, and when receiving a received wave, for example, a medium-wave broadcast, is retransmitted in a tunnel, a subway, an underground shopping mall, or the like. It is possible to prevent the retransmitted wave from wrapping around the system, and when the receiver receives the retransmitted broadcast wave, the beat content does not occur and the broadcast content can be heard reliably, and the construction work is It is an object of the present invention to provide a received wave retransmitting device that is easy to perform, the device scale is reduced, and the degree of freedom in arranging each unit is improved.

[0011]

In order to achieve the above object, a received wave retransmitting device according to a first aspect of the present invention includes a receiving antenna for receiving a transmitted radio wave and an optical signal for receiving a signal from the receiving antenna. The optical signal conversion means for converting and transmitting to the optical transmission line, the optical transmission line for transmitting the optical signal from the optical signal conversion means, and the optical reception signal from the optical transmission line are photoelectrically converted, and reception of this photoelectrically converted reception wave A reception processing means for selecting at least one or more transmission waves from the signal, a transmission means for transmitting a reception signal of the reception wave selected by the reception processing means, and a reception signal from the transmission means for a frequency of the reception wave. It is configured to include a transmitting unit that retransmits at the same frequency.

According to another aspect of the present invention, there is provided a received wave retransmitting apparatus, wherein the transmission means is an optical transmission interface section for converting a reception signal from the reception processing means into an optical signal and transmitting the optical signal, and an optical signal from the optical transmission interface section. And an optical receiving interface section for sending out a received signal obtained by photoelectrically converting an optical signal from the optical transmission line.

According to a third aspect of the present invention, the received wave retransmitting device uses a metallic coaxial transmission line for transmitting the reception signal from the reception processing means to the transmission means as the transmission means.

According to another aspect of the present invention, there is provided a received wave retransmitting device in which power is supplied to the optical signal conversion means from the power supply line in the reception processing means.

According to a fifth aspect of the present invention, there is provided a receiving wave retransmitting device, which is provided with a solar cell and supplies the voltage generated by the solar cell to the optical signal converting means.

According to a sixth aspect of the present invention, there is provided a received wave retransmitting device, wherein the transmitting means comprises a metallic coaxial transmission line for transmitting a transmission signal, a matching device for impedance matching with an output end of the transmitting means, and a load, and a transmitting device. It is configured to include a leaky transmission line for radiating a signal as a radio wave and a terminating resistor connected to an end of the leaky transmission line.

According to a seventh aspect of the present invention, there is provided a receiving wave retransmitting device, wherein an optical signal converting means is arranged in the vicinity of an output end of the receiving antenna, and an optical receiving signal is transmitted from the optical signal converting means through an optical transmission line. It is configured.

According to the eighth aspect of the present invention, there is provided a reception wave retransmitting device, wherein two of the devices having the configurations of the first to seventh aspects are installed and the reception wave is retransmitted bidirectionally.

[0019]

In the received wave retransmitting device according to the present invention having the above-mentioned structure, the received wave received by the receiving antenna, for example, the received signal of the medium wave broadcast is supplied from the reception processing means. It is converted into an optical signal by the so-called optical signal conversion means and is sent to the optical transmission line (optical cable). This optical reception signal is further converted into a reception signal, and for example, the reception signal of each broadcast wave of one wave or a plurality of frequencies selected by the tuning circuit is transmitted to the transmission means through an optical transmission line or a coaxial transmission line (coaxial cable). The signal is transmitted to the matching device, and is transmitted from the leaky transmission line to the terminating resistor at the same frequency as the received wave, and is retransmitted.

Therefore, it is possible to prevent the retransmitted wave from sneaking into the reception processing system in a tunnel, a subway, an underground shopping mall, or the like. That is, even if the retransmitted signal or its radio wave goes around the optical transmission line, the phase difference does not occur because the signal processed here is an optical signal. This facilitates the work of laying the optical and coaxial transmission lines (cables). For example, it is not necessary to insert a metal tube into the transmission line to shield it, or to bury it in the ground to shield it, which facilitates the construction. Further, the receiver that receives the retransmitted transmission wave does not generate a beat sound and the received contents can be reliably heard.

In the received wave retransmitting device according to the fourth aspect, since the power source (voltage) is supplied to the optical signal converting means from the power source line in the reception processing means, the power source (voltage) is supplied to the optical signal converting means. A dedicated power supply for the operation becomes unnecessary, and the device scale is reduced.

In the received wave retransmitting device according to the fifth aspect, since the voltage generated by the solar cell is supplied to the optical signal converting means, a dedicated power source for supplying power (voltage) to the optical signal converting means is unnecessary. As a result, the scale of the device does not increase, and the degree of freedom in arranging the receiving antenna and the optical signal converting means is improved, and the receiving antenna can be installed in a place where the receiving condition is good (strong electric field), and the installation work etc. Will also be easier.

In the received wave retransmitting device according to the seventh aspect, the optical signal converting means is arranged in the vicinity of the output end of the receiving antenna. For example, since the output end of the receiving antenna and the input end of the optical signal converting means are directly connected, the transmission loss of the received signal at the receiving antenna does not occur, and the noise-to-signal (S / N) The ratio is improved. In other words, high S / N ratio retransmission is possible, and high quality retransmission is performed.

An apparatus for retransmitting received waves according to claim 8 is configured such that two of the apparatuses having the configurations according to claims 1 to 7 are installed and retransmits the received waves bidirectionally. .
Therefore, in addition to the retransmission of the received wave, it can be applied to, for example, a cellular type mobile telephone system, and its usage range is expanded.

Next, an embodiment of the received wave retransmitting apparatus of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the first embodiment of the received wave retransmission apparatus of the present invention. In FIG. 1, the first embodiment is a broadcast wave retransmitting device for retransmitting medium-wave broadcasting, FM broadcasting, TV broadcasting, etc.,
A reception antenna 11 that receives the broadcast radio wave Wa and an optical transmission interface (I / F) unit 12 that converts a reception signal from the reception antenna 11 into an optical signal and sends the optical signal are provided. Further, an optical cable 13 for transmitting an optical reception signal from the optical transmission I / F unit 12, and a tuning circuit for photoelectrically converting the optical reception signal from the optical cable 13 to broadcast each predetermined one wave or a plurality of frequencies And a receiving device 14 for transmitting a photoelectrically received optical reception signal.

Further, the receiving device 14 has an optical receiving I / F section 14a for photoelectrically converting an optical receiving signal from the optical cable 13.
And an optical transmission I for photoelectrically converting a received signal in which a predetermined one or a plurality of broadcast waves of a plurality of frequencies are selected through a tuning circuit (optical signal to optical signal conversion) and transmitting the optical received signal.
/ F section 14b is provided. Furthermore, the receiving device 1
4, an optical cable 15 for transmitting an optical reception signal from the optical transmission I / F unit 14b, and an optical reception signal (broadcast waves of one wave or multiple frequencies) from the optical cable 15 are photoelectrically converted, and the reception signal is received. Is provided with a predetermined electric power, for example, a transmission signal (same frequency as the broadcast radio wave Wa) for transmitting as a weak radio wave.

The transmitter 16 is provided with an optical reception I / F section 16a for photoelectrically converting an optical reception signal (one wave or each broadcast wave of a plurality of frequencies) from the optical cable 15.

A coaxial cable 17 for transmitting a received signal from the transmitter 16 and a matching device 18 for impedance matching between the transmitter 16 and the load are provided. Further, a leak cable 19 for radiating (retransmitting) the transmission signal from the matching device 18 as a radio wave Wb.
And a terminating resistor 20 that serves as a load on the output end of the transmission device 16 and the leakage cable 19 and whose impedance is matched.

FIG. 2 is a block diagram showing the configuration of the optical receiving I / F unit 14a (16a). In FIG. 2, this example shows a light receiving element 21a such as a photodiode for transmitting a reception signal obtained by photoelectrically converting an optical reception signal from the optical cable 13 (15), and a bandpass filter (BPF) for removing noise from the reception signal. ) 21b and this BPF 21b
And an amplifier 21c for amplifying and transmitting the received signal from.

FIG. 3 is a block diagram showing the configuration of the optical transmission I / F section 14b. In FIG. 3, in this example, an amplifier 22a that amplifies a received signal, a BPF 22b that removes noise from the received signal, an amplifier 22c that amplifies the received signal from the BPF 22b, and a received signal from the amplifier 22c are photoelectrically converted ( And a light emitting element 22d for converting an electric signal into a light reception signal).

The reception antenna 11 and the optical transmission I / F unit 12 are directly connected to the output end of the reception antenna 11 and the input end of the amplifier 22a of the optical transmission I / F unit 12, respectively.
No transmission loss occurs in the received signal from No. 1 and the noise-to-signal (S / N) ratio of the received signal in a weak electric field is improved. Further, the optical transmission I / F unit 12 is provided with a power source (not shown).

Next, the operation of the first embodiment will be described. The reception antenna 11 receives the broadcast wave Wa in the medium-wave band, the received signal is photoelectrically converted (the electric signal is converted into an optical reception signal) in the optical transmission I / F unit 12, and the optical reception signal is sent to the optical cable 13. To be done. An optical reception signal is input to the receiving device 14 through the optical cable 13.

In the receiving device 14, the light receiving element 21a photoelectrically converts the optical reception signal from the optical cable 13, and the converted reception signal is selected by the BPF 21b and the amplifier 22c. In this case, in order to receive a plurality of broadcast waves, the BPF 21b and the amplifier 22c in which the center frequencies are adjusted to the frequencies of the respective received waves are connected in parallel and the broadcast waves of a plurality of frequencies are selected. The reception signal selected here is subjected to photoelectric conversion (optical conversion of an electric signal) in the optical transmission I / F unit 14b, and is sent to the transmission device 16 through the optical cable 15.

In the transmitting device 16, the optical receiving I / F unit 16a is photoelectrically converted, and the converted reception signal is amplified to a predetermined power by a transmitting unit (not shown). For example, a weak radio wave transmission signal is transmitted through the coaxial cable 17. This transmission signal is impedance-matched by the matching device 18, and is sent to the terminating resistor 20 through the leakage cable 19. From the leaky cable 19, a broadcast wave Wb of one wave or a plurality of frequencies is transmitted in a tunnel, a subway, and a building underground mall.

In this case, even if the radio wave leaking from the coaxial cable 17 or the broadcast radio wave Wb from the leaking cable 19 goes around the receiving antenna 11 and the optical cables 13 and 15,
Since the signal processed here is an optical signal, a phase difference does not occur, and a beat sound does not occur in the receiver that receives this broadcast radio wave Wb. That is, the broadcast contents can be reliably heard by the receiver. Further, when the television broadcast is retransmitted, the audio content can be reliably heard and a high-quality screen can be obtained.

FIG. 4 is a block diagram showing the configuration of the second embodiment of the received wave retransmission apparatus. In FIG. 4, this second
In the embodiment, only the receiving antenna 11 and the receiving device 14 are connected by the optical cable 13. The receiving device 14 and the transmitting device 16 are connected by a coaxial cable 23.
In addition, a power supply unit 14 c that supplies power to the internal circuit and also supplies power to the optical transmission I / F unit 12 is provided in the reception device 14. The other structure is similar to that of the first embodiment shown in FIG.

The operation of this second embodiment is the same as that of the first embodiment shown in FIG.
The operation is similar to that of the embodiment. In this configuration, the optical transmission I /
It is not necessary to provide a power source in the F section 12, and the device scale is reduced.

FIG. 5 is a block diagram showing the configuration of the third embodiment of the received wave retransmitting apparatus. In FIG. 5, this third
In the embodiment, with the same configuration as the first embodiment shown in FIG. 1, power is supplied to the internal circuit here in the receiving device 14, and power is also supplied to the optical transmission I / F unit 12. A power supply unit 14c is provided. The other structure is similar to that of the first embodiment shown in FIG.

The operation of this third embodiment is the same as that of the first embodiment shown in FIG.
The operation is similar to that of the embodiment. Also with this configuration, it is not necessary to provide a power source in the optical transmission I / F unit 12 as in the second embodiment, and the device scale can be reduced.

FIG. 6 is a block diagram showing the configuration of the fourth embodiment of the received wave retransmitting device. In FIG. 6, this fourth
In the embodiment, a solar cell 24 is provided in the vicinity of the optical transmission I / F unit 12 with the same configuration as the second embodiment shown in FIG.

The operation of the fourth embodiment is the same as that of the second embodiment shown in FIG.
The operation is similar to that of the embodiment. In the fourth embodiment, since the solar cell 24 is provided in the vicinity of the receiving antenna 11 that receives the broadcast radio wave Wa inside the tunnel, inside the subway, and outside the building underground shopping area, the optical transmission I / F unit 12 and When the power supply from the receiving device 14 is difficult because the device 14 is largely separated from the device 14, the work for laying the power supply connecting line is unnecessary.

FIG. 7 is a block diagram showing the configuration of the fifth embodiment of the received wave retransmitting apparatus. In FIG. 7, this fifth
The embodiment has the same configuration as that of the first embodiment shown in FIG. 1, and a solar cell 24 is provided near the optical transmission I / F unit 12.

The operation of this fifth embodiment is the same as that of the first embodiment shown in FIG.
The operation is similar to that of the embodiment. In the fifth embodiment, the solar cell 2 is provided near the receiving antenna 11 as in the fourth embodiment.
Since the optical transmission I / F unit 12 and the receiving device 14 are separated from each other due to the provision of No. 4, the installation work of the power supply connecting line is unnecessary when the power supply from the receiving device 14 is difficult.

FIG. 8 is a block diagram showing the configuration of the sixth embodiment of the received wave retransmitting device. In the sixth embodiment, two reception wave retransmitting devices having the configuration shown in FIG. 1 are used to perform bidirectional retransmitting.

In FIG. 8, this example is applied to, for example, a cellular type mobile telephone system, and a first received wave retransmitting device that retransmits radio waves from the cell base station 30 to the underground building 31 of the building. 32a and a second received wave retransmitting device 32b that retransmits the transmitted radio waves from the mobile telephone 33 that has moved to the underground shopping area 31 to the ground.

In the sixth embodiment, the radio wave from the cell base station 30 is retransmitted by the first reception wave retransmitting device 32a to the underground building 31, etc., and the mobile telephone 33 receives the retransmitted radio wave. Also, the radio wave transmitted from the mobile telephone 33 is retransmitted to the cell base station 30 on the ground by the second reception wave retransmission device 32b.

In the sixth embodiment, particularly in the case of the analog system, there are the same advantages as those described above, and reliable and good communication is possible.

In this embodiment, the explanation has been made for tunnels, subways, underground shopping malls, etc., but the present invention can also be applied to re-transmission in weak electric field regions (hearing loss regions) such as mountains.

In this embodiment, one-way retransmission such as AM broadcasting, FM broadcasting and TV broadcasting has been described.
The same applies to other one-way retransmissions.
For example, even in the case of a radio call of a radio selective calling device (pager), in a tunnel, a subway, where the radio waves are hard to reach,
Also, it can be applied as it is as a receiving wave retransmitting device in a building underground shopping mall. In this case, the pager can be surely called in a tunnel, a subway, an underground shopping mall, or the like.

[0050]

As is apparent from the above description, the received wave retransmitting device according to the first to third aspects converts the received wave received by the receiving antenna into an optical signal and transmits it through the optical transmission line. However, since this optical reception signal is converted into a reception signal again and is retransmitted from the leaky transmission line at the same frequency as the reception wave, the re-transmission signal (audio signal in the AF method) and its radio wave are transmitted through the optical transmission line. Even if it goes around, the phase difference does not occur because the signal processed here is an optical signal, and the receiver that receives the retransmitted transmission wave does not generate a beat sound and the received content is reliable. Can be heard. further,
This has the effect of facilitating installation work for optical and coaxial transmission lines (cables) and installation work for devices.

In the received wave retransmitting device according to the fourth aspect, the power supply (voltage) is supplied from the power supply line in the reception processing means to the optical signal converting means. Therefore, a dedicated power supply for supplying power (voltage) to the optical signal conversion means is not required,
This has the effect of reducing the scale of the device.

In the received wave retransmitting device according to the fifth aspect, since the voltage generated by the solar cell is supplied to the optical signal converting means, a dedicated power source for supplying power (voltage) to the optical signal converting means is unnecessary. As a result, the scale of the device does not increase, and the degree of freedom in arranging the receiving antenna and the optical signal converting means is improved, and the receiving antenna can be installed in a place where the receiving condition is good (strong electric field), and the installation work etc. Has the effect of becoming easier.

In the received wave retransmitting device according to the seventh aspect, the optical signal converting means is arranged near the output end of the receiving antenna. For example, since the output end of the receiving antenna and the input end of the optical signal converting means are directly connected, the transmission loss of the receiving signal at the receiving antenna does not occur and the noise-to-signal (S / The N) ratio is improved, and high-quality retransmission is possible.

The received wave retransmitting device according to claim 8 is configured such that two of the devices having the structures according to claims 1 to 7 are installed and the receiving wave is retransmitted bidirectionally. Therefore, in addition to the retransmission of the transmitted wave, for example, bidirectional retransmission of a cellular type mobile telephone system or the like becomes possible, which has the effect of expanding the range of use.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a first embodiment of a received wave retransmission apparatus of the present invention.

FIG. 2 is a block diagram showing a configuration of an optical receiving I / F unit in FIG.

3 is a block diagram showing a configuration of an optical transmission I / F unit in FIG.

FIG. 4 is a block diagram showing a configuration of a second exemplary embodiment.

FIG. 5 is a block diagram showing a configuration of a third exemplary embodiment.

FIG. 6 is a block diagram showing a configuration of a fourth exemplary embodiment.

FIG. 7 is a block diagram showing a configuration of a fifth exemplary embodiment.

FIG. 8 is a block diagram showing a configuration of a sixth embodiment.

FIG. 9 is a block diagram showing a configuration of a conventional broadcast wave retransmission device.

[Explanation of symbols]

 11 Receiving Antenna 12 Optical Transmission I / F Unit 13,15 Optical Cable 14 Receiving Device 14c Power Supply Unit 16 Transmitting Device 16a Optical Reception I / F Unit 17,23 Coaxial Cable 18 Matching Device 19 Leakage Cable 20 Terminating Resistor 24 Solar Cell

Claims (8)

[Claims] 1. A receiving antenna for receiving a transmitted radio wave, an optical signal converting means for converting a received signal from the receiving antenna into an optical signal and transmitting the optical signal, and transmitting an optical signal from the optical signal converting means. An optical transmission line, and a reception processing unit that photoelectrically converts an optical reception signal from the optical transmission line, and selects at least one or more transmission waves from the reception signal of the photoelectrically converted reception wave; Receiving, comprising: a transmitting unit that transmits a received signal of the received wave selected by the processing unit, and a transmitting unit that retransmits the received signal from the transmitting unit at the same frequency as the frequency of the received wave. Wave retransmitter. 2. An optical transmission interface unit for converting the reception signal from the reception processing unit into an optical signal and transmitting the optical signal, and an optical transmission line for transmitting the optical signal from the optical transmission interface unit as the transmission unit. 2. The received wave retransmitting device according to claim 1, further comprising: an optical receiving interface section that sends out a received signal obtained by photoelectrically converting an optical signal from the optical transmission line. 3. The metallic coaxial transmission line for transmitting the reception signal from the reception processing means to the transmission means is used as the transmission means.
The received wave retransmitting device described. 4. The received wave retransmitting device according to claim 1, wherein power is supplied to the optical signal converting means from a power supply line in the reception processing means. 5. The received wave retransmitting device according to claim 1, wherein a solar cell is provided and the power generation voltage of the solar cell is supplied to the optical signal converting means. 6. The matching means for impedance matching between the metallic coaxial transmission line for transmitting a transmission signal, the output end of the transmission means and the load, and the leakage transmission for radiating the transmission signal as a radio wave, as the transmitting means. The reception wave retransmission device according to claim 1, further comprising: a line; and a terminating resistor connected to the end of the leaky transmission line. 7. The optical signal conversion means is arranged in the vicinity of the output end of the receiving antenna, and the optical reception signal is sent out from the optical signal conversion means through an optical transmission line. Receiving wave transmitter. 8. A received wave retransmitting device comprising two sets of the devices having the structures according to claims 1 to 7 and retransmitting a received wave bidirectionally.