JP4291657B2 - Receiving system - Google Patents

Description

The present invention relates to a reception system using a frequency diversity receiver. For example, frequency diversity receiver to which the present invention has, as an example, antenna feeder Ru unnecessary television receiver der.

  In recent years, the transition from analog modulated waves to digital modulated waves has been studied for terrestrial broadcasting on television. When a digital modulation wave is used, the minimum C / N ratio (carrier power to noise ratio) necessary for receiving a high-quality image can be greatly reduced as compared with a conventional analog modulation wave. By connecting the antenna directly to the television receiver, a high-quality image can be viewed in a relatively wide area.

However, the conventional techniques have the following problems. Due to fading, shadowing, etc., there may be places where the signal strength is extremely weak. When the indoor antenna is connected directly to the TV receiver, a sufficient C / N ratio may not be obtained depending on the installation location. There is sex. In addition, even if a TV is installed in a place where sufficient reception strength can be obtained, the propagation status of radio waves changes every moment, so that reception strength may weaken over time and image quality may deteriorate. is there. Furthermore, in the case of terrestrial digital broadcasting, since channels exist over a wide band, there is a possibility that a radio wave propagation situation differs for each channel, and a channel that cannot be received may occur.
JP 11-313020 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a reception system that can suppress the influence of fading and shadowing and the influence of temporal changes in the propagation state of radio waves and can receive signals over a wide band.

  That is, as an example, in view of the above problems, the present invention provides a television receiver that can greatly reduce the fading probability both inside and outside a building and receive broadcasts without directly connecting an outdoor antenna. .

In order to solve the above problems, a receiving system according to the present invention is installed on a veranda or a window of a house, and an antenna for receiving a signal in the first radio signal wave band of the UHF band is attached to the receiving system. A repeater that emits into the space as a second radio signal waveband signal in the millimeter wave band generated by frequency-converting all or part of the signal in the first radio signal waveband,
Is installed in a room, a first receiving means for generating a signal of a first signal wave band by receiving a signal of the first radio signal wave band of the UHF band directly, the millimeter wave from the repeater And a second receiving means for receiving a signal in the second radio signal wave band and generating a signal in the second signal wave band, and signals in the first and second signal wave bands There and a that have a television receiver main body input frequency diversity receiver.

  According to the present invention, the first radio signal waveband signal is directly received by the first receiving means, and the first radio signal waveband signal is frequency-converted by the second receiving means. The second radio signal waveband signal generated in this manner is received to generate a second signal waveband signal.

  That is, according to the present invention, the first radio signal waveband signal is directly or indirectly received by the first and second receiving means, so that one is selected or both are synthesized. It becomes possible. Further, the same information can be received by signals of two types of frequencies having different propagation characteristics (signals in the first and second radio signal wavebands). Therefore, it is possible to suppress the influence of fading and shadowing in the signal of the first radio signal waveband and the influence of temporal change in the propagation state of the radio wave, and it is possible to receive over a wide band.

  In the frequency diversity receiver according to an embodiment, the second receiving unit has the same frequency component as the signal in the second signal waveband as all or part of the signal in the first signal waveband. It has a function of performing frequency conversion to a signal in the third signal waveband.

  According to this embodiment, the second receiving means converts the frequency of the signal of the second signal waveband into a signal of the third signal waveband having the same frequency component as the signal of the first signal waveband. . As a result, it is possible to perform signal processing (comparison, synthesis, etc.) on the signal in the third signal waveband from the second receiving means and the signal in the first signal waveband from the first receiving means. Become.

  In the frequency diversity receiver according to an embodiment, the signal of the first signal waveband and the signal of the third signal waveband are input, and the signal of the first signal waveband and the third signal are input. A synthesizer that sends a signal obtained by adding the signals in the waveband to the tuner;

  According to this embodiment, a signal obtained by adding the signal of the first signal waveband from the first receiving means and the signal of the third signal waveband from the second receiving means to the tuner by the combiner. send. Therefore, the C / N ratio of the signal having the stronger signal strength out of the signals in the first and third signal wavebands becomes dominant, and the space of the radio wave propagation state in the signal in the first radio signal waveband. It is possible to suppress the influence of a change in time and a change in time.

  The frequency diversity receiver according to an embodiment further includes a signal selection unit that selects a signal having a stronger signal wave band from the signal of the first signal wave band and the signal of the third signal wave band. Have

  According to this embodiment, the signal selection means selects the signal having the stronger signal wave band from the signal of the first signal wave band and the signal of the third signal wave band. The influence of the spatial change and the temporal change of the propagation state of the radio wave in the signal of one radio signal waveband can be suppressed.

  The frequency diversity receiver according to an embodiment is a television receiver, and the signal of the first radio signal waveband is a signal of a broadcast waveband of the television.

  According to this embodiment, since it is a television receiver, and the signal of the first radio signal waveband is a signal of the broadcast waveband of the television, the spatial change of the radio wave propagation state in the television (television) broadcast In addition, the influence of temporal changes can be suppressed. That is, it is possible to realize a television receiver that can greatly reduce the probability of fading both inside and outside a building and receive broadcasts without directly connecting an outdoor antenna.

  The frequency diversity receiver according to an embodiment includes a receiver main body having a plurality of input terminals, the first receiving unit and the second receiving unit having output terminals having the same shape, The plurality of input terminals of the receiver main body can be connected to at least one of the output terminal of the first receiving unit and the output terminal of the second receiving unit, respectively.

  According to this embodiment, either the output terminal of the first receiving means or the output terminal of the second receiving means can be connected to each of the plurality of input terminals of the receiver body. Therefore, the first receiving means can be connected to each of the plurality of input terminals of the receiver body according to the propagation state of the signal in the first radio signal waveband, and each of the plurality of input terminals It is also possible to connect the second receiving means. Therefore, the best radio wave reception state can be easily achieved.

  That is, in this embodiment, since the first receiving means and the second receiving means have output terminals having the same shape, it is possible to use the receiving means properly according to the radio wave propagation situation.

  Moreover, the frequency diversity receiver of one Embodiment can superimpose a DC voltage on the plurality of input terminals.

  According to this embodiment, DC power for operating the receiver main body can be supplied from the input terminal by superimposing the DC voltage on the plurality of input terminals of the receiver main body. For example, in this embodiment, by superimposing a DC voltage on the input terminal (antenna terminal) of the UHF signal of the receiver body, the second radio signal waveband is changed to the third signal waveband by the second receiving means. The power required for frequency conversion can be supplied from the input terminal of the receiver body.

  In the frequency diversity receiver according to an embodiment, the first reception unit is a first reception antenna that receives a signal in the first radio signal waveband, and the second reception unit is A second receiving antenna that receives a signal in the second radio signal waveband; and a frequency converter that converts the frequency of the signal in the second radio signal waveband received by the second receiving antenna.

  According to this embodiment, the second receiving means frequency-converts the signal of the second radio signal waveband by the frequency converter and generates the signal of the first signal waveband generated by the first receiving antenna. Can be a signal in the same frequency band. Therefore, the signal of the first signal wave band generated by the first receiving means and the signal of the second signal wave band generated by the second receiving means can be set to the same frequency band, and the signals of both signals Processing (comparison or synthesis, etc.) becomes easy.

  In the frequency diversity receiver according to an embodiment, the signal in the first radio signal waveband is a digital modulated wave.

  In this embodiment, the signal of the first radio signal waveband is, for example, a digital modulated wave such as a terrestrial digital television broadcast wave, and can receive a high-quality television broadcast.

  In the frequency diversity receiver according to an embodiment, the second radio signal waveband is between 30 GHz and 300 GHz.

  In this embodiment, since the signal in the second radio signal waveband is between 30 GHz and 300 GHz, that is, in the millimeter wave band, the straightness is strong and interference with other receivers can be reduced.

In addition, the reception system of one reference example is connected to an outdoor antenna and the outdoor antenna through a cable, converts the frequency of the signal of the first radio signal wave band received by the outdoor antenna, and generates a second radio signal wave. a repeater to release into a space as a band of the signal, and frequency diversity receiver, in constructed.

In the receiving system of this reference example, a signal in the first radio signal waveband is received by the outdoor antenna, and the signal in the first radio signal waveband is transmitted to the repeater via a cable. The repeater frequency-converts the signal of the first radio signal waveband and emits it to the space as a signal of the second radio signal waveband. On the other hand, in the frequency diversity receiver, the second receiving means receives the signal of the second radio signal wave band emitted from the repeater and generates the signal of the second signal wave band. The first receiving means directly receives a signal in the first radio signal band and generates a signal in the first signal band.

  As a result, according to this receiving system, one of the first radio signal waveband signals is directly or indirectly received by the first and second receiving means to select one or synthesize both. It becomes possible to do. Further, the same information can be received by signals of two types of frequencies having different propagation characteristics (signals in the first and second radio signal wavebands). Therefore, it is possible to suppress the influence of fading and shadowing in the signal of the first radio signal waveband and the influence of temporal change in the propagation state of the radio wave, and it is possible to receive over a wide band.

Further, in the reception system of one reference example, the repeater and the frequency diversity receiver are installed indoors.

In this reference example , since the repeater and the frequency diversity receiver are installed indoors, even if it is difficult to directly receive the signal of the first radio signal waveband by the first receiving means by a reinforcing bar or the like, the relay is performed. The second receiving means can receive the signal of the second radio signal wave band emitted from the machine to the indoor space. Therefore, the information by the signal of the first radio signal waveband can be reliably received.

  In addition, the reception system according to the embodiment includes an antenna that receives a signal of the first radio signal waveband, and frequency-converts the signal of the first radio signal waveband received by the antenna, The frequency diversity receiver according to claim 1, comprising: a repeater that emits a radio signal waveband signal into space;

  In the receiving system of this embodiment, a signal of the first radio signal waveband is received by the antenna, and a signal of the first radio signal waveband received by the antenna is frequency-converted by a repeater and the second The signal is emitted into space as a radio signal waveband signal. On the other hand, in the frequency diversity receiver, the second radio signal wave band signal emitted from the repeater is received by the second receiving means to generate the second signal wave band signal, and the first reception signal is received. The means directly receives the signal of the first radio signal waveband and generates the signal of the first signal waveband. In this receiving system, there are two paths: information received by the second receiving means via the antenna and the relay, and information received by the first receiving means via the antenna and the relay. Can be transmitted by route. Therefore, it is possible to suppress the influence of fading and shadowing and the influence of temporal change in the propagation state of the radio wave, and a reception system capable of receiving over a wide band.

  In one embodiment of the reception system, an antenna that receives a signal in the first radio signal waveband is attached to the repeater.

  In the receiving system of this embodiment, since the antenna that receives the signal of the first radio signal waveband is attached to the repeater, by installing this repeater in a place suitable for radio wave reception such as a veranda or a window, The signal of the first radio signal waveband can be relayed, and large-scale outdoor antenna installation work and wiring work are unnecessary.

Thus, the reception system including the frequency diversity receiver of the present invention directly receives and outputs a television radio broadcast wave with an antenna (first receiving means) attached to the television receiver body, for example, Separately, a second radio signal wave that is transmitted by relaying a radio broadcast wave of a television by a repeater (with an outdoor antenna and a frequency converter) and a frequency converter with a receiving antenna (second reception) provided in the television receiver body. Means) and frequency-converted and output, and the television receiver main body can select one of the received two broadcast waves or synthesize both. The frequency diversity receiver is not limited to a television receiver, and may be a receiver that receives other information. Therefore, the received signal is not limited to the television broadcast wave. In the case of a television broadcast wave, it may be a digitally modulated wave.

  In other words, the first receiving means receives the first radio signal wave band directly to generate the first signal wave band, and the second receiving means uses all of the first radio signal wave band. Alternatively, the second signal wave band is generated by receiving a second radio signal wave band generated by frequency-converting a part thereof. In this case, the second receiving means has a function of frequency-converting the second signal wave band into a third signal wave band having the same frequency component as all or part of the first signal wave band. In this way, by transmitting the same information at two types of frequencies having different propagation characteristics, it is possible to receive in a wide area. The first signal wave band and the third signal wave band are input to a tuner provided in the television receiver body.

  When one of the first signal wave band and the third signal wave band is selected, the signal wave band having the stronger intensity is selected. As described above, propagation is performed at two types of frequencies, and the frequency is matched within the receiver to achieve diversity, thereby greatly reducing the occurrence of fading and receiving higher quality information.

  The first receiving means and the second receiving means have the same output terminal shape, and a plurality of input terminals to which the first receiving means or the second receiving means can be connected to the frequency diversity receiver body. By providing, it becomes possible to use the receiving means properly according to the situation. In this case, if the DC voltage can be superimposed on the plurality of input terminals, the second radio signal waveband is converted to the third signal wave by the second receiving unit by superimposing the DC voltage. Power required for frequency conversion to the band can be supplied from the input terminal of the receiver body.

  As a second radio signal wave band received by the second receiving means, a millimeter wave having a strong straightness such as 30 GHz to 300 GHz can be used to reduce interference with other receivers. In addition, by installing the repeater indoors, the diversity receiver can reliably receive information even if the first radio signal waveband is interrupted by a reinforcing bar or the like.

According to the receiving system having the frequency diversity receiver of the present invention, the first radio signal waveband signal is directly or indirectly received by the first and second receiving means to select one of them. Or both can be synthesized. Further, the same information can be received by signals of two types of frequencies having different propagation characteristics (signals in the first and second radio signal wavebands). Therefore, it is possible to suppress the influence of fading and shadowing in the signal of the first radio signal waveband and the influence of temporal change in the propagation state of the radio wave, and it is possible to receive over a wide band.

  In other words, according to the present invention, the same information is propagated in radio signal wavebands of two different frequencies, and the diversity is achieved by aligning the frequencies in the receiver, thereby greatly reducing the occurrence of fading. It is possible to receive quality information over a wide area.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

< Reference Example 1>
FIG. 1 shows a basic concept of Reference Example 1 of the receiving system of the present invention. The diversity receiving system of Reference Example 1 includes a television main body 101 that supports terrestrial digital television broadcasting, a television broadcast receiving indoor antenna 102 as a first receiving antenna that constitutes a first receiving means, and a millimeter-wave antenna integrated down converter 103. , A TV broadcast receiving outdoor antenna 104, a millimeter wave antenna integrated up-converter 105, and a signal cable 106. A signal wave of digital terrestrial television broadcasting with a frequency of 470 MHz to 770 MHz as a signal of the first radio signal wave band is received by an outdoor antenna 104 installed outdoors, passes through a signal cable 106, and passes through an indoor millimeter wave antenna. It is sent to the integrated up-converter 105.

  The millimeter-wave antenna integrated down converter 103 constitutes a second receiving means. Further, the down converter 103, the indoor antenna 102, and the television main body 101 form a frequency diversity receiver.

  Within the millimeter-wave antenna integrated up-converter 105, the signal in the signal band is frequency-converted to a millimeter-wave band with a frequency of 59.48 to 59.78 GHz, and is emitted into the indoor space by the millimeter-wave antenna. In this case, the millimeter wave antenna integrated up-converter 105 functions as a repeater. The signal wave band of the frequency 59.48 to 59.78 GHz converted to the millimeter wave band is received by the millimeter-wave antenna integrated down converter 103, and again into the same frequency band of 470 MHz to 770 MHz as the original television broadcast wave, Frequency converted. On the other hand, the television broadcast receiving indoor antenna 102 connected to the television receives a television broadcast wave directly.

  The signal whose frequency is converted from the millimeter wave by the down converter 103 and the signal directly received by the indoor antenna 102 for receiving the television broadcast are detected in the television body, and the signal having the higher signal strength is selected. The

  By using the above configuration, signals in the signal wave band converted from millimeter waves are mainly selected in places where radio waves are difficult to reach, such as in buildings, whereas broadcasts are available in places where radio waves are easily reached or outdoors. A direct wave signal is selected. In this way, the probability of fading can be reduced by combining UHF band TV broadcast waves and radio waves with completely different propagation characteristics, such as millimeter waves, which are highly linear and have little multipath effect, and taking their diversity. The area that can receive broadcasts without connecting the TV receiver and the outdoor antenna directly is expanded. In addition, by using a millimeter wave band (30 to 300 GHz) that is highly linear in indoor propagation, for example, interference with a receiver in a neighboring house is extremely reduced.

< Reference Example 2>
An example of a specific diversity television receiver is shown in FIG. This television receiver includes a television broadcast receiving indoor antenna 202 as a first receiving means, a millimeter-wave antenna integrated down converter 203 as a second receiving means, a combiner 204, and a tuner 205. Reference numeral 201 denotes a main body. Since the circuit blocks after the tuner are not the essence of the present invention, they are omitted here. A television wave receiving indoor antenna 202 receives a signal wave in the UHF band of 470 to 770 MHz as a signal in the first radio signal wave band, and sends it to the combiner 204. On the other hand, the millimeter-wave antenna integrated down converter 203 receives a 59.48 to 59.78 GHz millimeter-wave signal as the second radio signal waveband signal, and converts the frequency to a 470-770 MHz signal waveband. Is sent to the synthesizer 204. In the synthesizer 204, the two signals are added together and sent to the tuner 205, where one channel is selected, and then converted into an IF signal having a center frequency of 57 MHz. As a result, the C / N ratio of the signal wave band with the stronger signal strength is dominant, and as described in the reference example 1, it is possible to receive broadcasts regardless of the location in the building or outdoors. . As described above, in Reference Example 2, not only one of the two input signals is selected and used, but both are added and used.

< Reference Example 3>
Another example of a specific diversity television receiver is shown in FIG. This television receiver includes a television broadcast receiving indoor antenna 302 as a first receiving means, a millimeter-wave antenna integrated down converter 303 as a second receiving means, a first tuner 304, a second tuner 305, an envelope. A line level comparator 306 and a switch 307 are included. Reference numeral 301 denotes a main body. A television wave receiving indoor antenna 302 receives a signal in the UHF band of 470 to 770 MHz as a signal in the first radio signal wave band, and sends the signal to the first tuner 304. On the other hand, the millimeter-wave antenna integrated down converter 303 receives a 59.48 to 59.78 GHz millimeter-wave signal as a second radio signal waveband signal, and converts the frequency to a 470-770 MHz signal waveband. Is sent to the second tuner 305.

  In the first tuner 304 and the second tuner 305, the same channel is selected and converted into an IF signal having a center frequency of 57 MHz. In addition, a part of the signal wave band is detected at a specific part of each of the first tuner 304 and the second tuner 305 and is compared by the envelope level comparator 306, and the comparison result indicates that the signal strength is higher. The switch 307 is closed on the tuner side. The signal detected in the tuner may be a UHF band or an IF signal.

  Here, an example of diversity of one indoor antenna for receiving television broadcasting and one millimeter-wave antenna integrated down converter is shown, but there may be a plurality of each. As described above, by comparing the envelope levels and selecting only the signal of the stronger signal band, even if the phase difference between the two signal bands is large, the strength does not weaken each other. A high C / N ratio can be secured.

< Reference Example 4>
FIG. 4 shows still another example of a specific diversity television receiver. This television receiver includes a television broadcast receiving indoor antenna 402 as a first receiving means, a millimeter-wave antenna integrated down converter 403 as a second receiving means, a first tuner 404, a second tuner 405, and It is composed of a synthesizer 408. Reference numeral 401 denotes a main body. The TV broadcast receiving indoor antenna 402 receives a signal in the UHF band signal band of 470 to 770 MHz as a signal in the first radio signal wave band, and sends it to the first tuner 404. On the other hand, the millimeter-wave antenna integrated down-converter 403 receives a 59.48 to 59.78 MHz millimeter-wave band signal as the second radio signal waveband signal, and converts the frequency to a 470 to 770 MHz signal waveband. Then, it is sent to the second tuner 405.

  In the first tuner 404 and the second tuner 405, the same channel is selected and converted into an IF signal having a center frequency of 57 MHz. The phase detector 406 detects the phase difference between the two IF signals output from the first tuner 404 and the second tuner 405, and the phase difference between the two IF signals becomes zero according to the phase difference. After the phase of one IF signal is adjusted by the phase shifter 407, they are added and output. As a result, two signals having the same phase are added together, so that a higher C / N ratio can be ensured.

< Reference Example 5>
Next, FIG. 5 shows an example of a specific millimeter-wave antenna integrated up-converter (repeater) and a millimeter-wave antenna integrated down-converter as the second receiving means. The millimeter-wave antenna integrated up-converter 501 includes a bandpass filter 502 having a band of 470 to 770 MHz, a bandpass filter 503 having a band of 3.941 to 4.241 GHz, a bandpass filter 504 having a band of 3.471 GHz, and a bandpass filter 505 having a band of 27.77 GHz. , Millimeter-wave band filter 506, 3.471 GHz phase-locked oscillator 507, 8-multiplier 508, mixer 509, even harmonic mixer 510, amplifiers 511, 512, 513 distributors 514, 515, combiner 516, attenuator 517, and The antenna 518 is used. The millimeter-wave antenna integrated down converter 521 includes amplifiers 522 and 523, a millimeter-wave filter 524, a bandpass filter 525 with a band of 470 to 770 MHz, a mixer 526, and an antenna 527.

  Subsequently, the operation will be described. First, in the millimeter-wave antenna integrated up-converter 501, the 3.471 GHz local oscillation signal output from the phase-locked oscillator 507 is divided into two by the distributor 514 through the band-pass filter, one of which is distributed to the distributor 515 and the other. Is input to the 8-multiplier 508. In distributor 515, the signal is further divided into two parts, one being input to mixer 509 and the other being input to combiner 516 via attenuator 517. The signal input to the 8-multiplier 508 is multiplied by 8 to become a 27.77 GHz signal, passes through the band-pass filter 505, and then is input to the even harmonic mixer 510.

  A UHF signal of 470 to 770 GHz as a signal of the first radio signal waveband received by the outdoor antenna passes through the band pass filter 502 and is generated by the local oscillation signal of 3.471 GHz in the mixer 509. The signal is up-converted to a 4.241 GHz signal, passed through a bandpass filter 503 and an amplifier 512, and then synthesized with a 3.471 GHz signal. As a result, from 516, a 3.941 to 4.241 GHz signal waveband and a 3.471 GHz signal are output. These signals are mixed with the 27.77 GHz local oscillation signal, up-converted into a 59.01 to 59.48 GHz signal waveband and a 59.78 GHz signal, and radiated from the antenna 518 to the space.

  On the other hand, in the antenna integrated down converter 521, the signal band of 59.01 to 59.48 GHz and the signal of 59.78 GHz are received by the antenna 527, and input to the mixer 526 through the millimeter wave band filter 524. In the mixer 526, the 59.01 to 59.48 GHz signal waveband and the 59.78 GHz signal are mixed, and the bandpass filter 525 extracts only the signal in the band 470 to 770 MHz. As a result, a signal wave band having no frequency deviation from the signal wave band input to the antenna integrated up-converter 501 is reproduced.

< Reference Example 6>
An example of another reference example of the present invention will be shown. Reference numeral 601 denotes a television main body, 602 denotes an indoor antenna, 603 denotes a millimeter wave antenna integrated down-converter, and 604A and 604B denote antenna terminals. The output terminal 605 of the millimeter wave antenna integrated down converter 603 and the terminal 606 of the indoor antenna 602 have the same shape, and can be connected to the antenna terminals 604A and 604B of the television.

  Further, the antenna terminals 604A and 604B can pass through the UHF band of 470 to 770 MHz and can be superimposed with a DC voltage. With this configuration, since either the indoor antenna 602 or the millimeter wave antenna integrated down converter 603 can be connected to the antenna terminals 604A and 604B, the indoor antenna is connected to one side and the millimeter wave antenna is connected to the other depending on the propagation state of radio waves. It is also possible to connect an integrated down-converter, connect an indoor antenna to both terminals, or connect a millimeter-wave antenna integrated down converter to both terminals.

Further, since a DC voltage is superimposed on the terminals 604A and 604B, DC power necessary to operate the millimeter wave antenna integrated down-converter can be supplied from the terminal 604A or 604B. It is desirable that the DC voltage of the terminals 604A and 604B can be turned on / off with a switch. In the television, a higher C / N ratio can be ensured by processing the signal by the method described in Reference Examples 2 to 4.

<Form state of implementation>
Next, FIG. 7 shows a receiving system in the form status of the present invention. This receiving system includes a television receiver 701 compatible with digital terrestrial television broadcasting, a television broadcast receiving antenna 702 as a first receiving means, and a millimeter-wave antenna integrated down converter as a second receiving means. 703, a television broadcast receiving antenna 704, and a millimeter-wave antenna integrated up-converter 705 as a repeater. In FIG. 7, reference numeral 700 denotes a room. The television receiver 701, down converter 703, and antenna 702 form a frequency diversity receiver.

  The millimeter-wave antenna integrated down converter 703 has a millimeter-wave antenna (not shown) that receives a millimeter-wave band radio signal. The millimeter-wave antenna integrated up-converter 705 has a millimeter-wave antenna (not shown) that transmits a millimeter-wave band radio signal.

The exemplary type condition is, the reference example differs from the abovementioned first, in that the television broadcast receiving antenna 704 is directly connected to the millimeter-wave antenna integrated upconverter 705.

  A television signal 707 of digital terrestrial television broadcasting having a frequency of 470 MHz to 770 MHz as a signal in the first radio signal waveband is received by a television broadcast receiving antenna 704 and transmitted to a millimeter wave antenna integrated up-converter 705. In the millimeter-wave antenna integrated up-converter 705, the television signal 707 is frequency-converted into a millimeter-wave signal 708 having a frequency of 59.48 to 59.78 GHz as a signal in the second radio signal wave band. A millimeter wave antenna (not shown) is emitted into the space in the chamber 700. That is, the millimeter-wave antenna integrated up-converter 705 functions as a repeater.

  A millimeter wave signal 708 having a frequency of 59.48 to 59.78 GHz, which has been converted to the millimeter wave band by the millimeter wave antenna integrated up-converter 705 serving as a repeater, is received by the millimeter wave antenna integrated down converter 703, The frequency is converted again to the same frequency band of 470 MHz to 770 MHz as the original television broadcast wave.

  On the other hand, a television broadcast reception antenna 702 connected to the television receiver 701 directly receives a television signal 707.

  Diversity is obtained between the signal frequency-converted from the millimeter wave signal 708 by the down converter 703 and the signal directly received by the television broadcast receiving antenna 702 in the same manner as in Reference Examples 2 to 4 described above.

In the present form condition, the millimeter-wave antenna integrated upconverter 705 television broadcast receiving antenna 704 is connected, for example, verandas or general homes, or the window or the like of the indoor, strong power strength of the television broadcast wave Location installed in.

In the present type condition, it converts the television broadcast waves received by the millimeter-wave antenna integrated upconverter 705 to a millimeter wave, a millimeter-wave signal 708 and radiates toward the interior. Therefore, even when the television receiver 701 is installed in a place where the television broadcast wave 707 is difficult to reach directly, the television broadcast wave 707 can be received via the up-converter 705 which is a repeater.

  Further, since the television broadcast receiving antenna 704 is directly connected to the millimeter wave antenna integrated upconverter 705, the television broadcast wave 707 can be relayed only by installing the upconverter 705 at an appropriate place such as a veranda. It becomes possible to do. Therefore, a large outdoor antenna installation work and wiring work are not required.

  The television broadcast receiving antenna 704 may be a rod-shaped antenna, or the antenna 704 may be formed on a flat substrate and incorporated in the housing of the millimeter wave antenna integrated up-converter 705.

Thus, in the present-shaped state, the television broadcast wave 707 in the UHF band, and is less affected by the millimeter wave of straightness is strong multi-path, a combination of radio waves with a completely different propagation characteristics, their diversity By taking it, it becomes possible to greatly reduce the probability of occurrence of fading, and the area where television broadcasting can be received can be expanded.

  Also, the millimeter wave antenna integrated up-converter 705 as a repeater uses the millimeter wave signal 708 in the millimeter wave band (30 to 300 GHz) having a strong straight traveling as the second radio signal wave band signal. Interference with the receiver will be very low.

It is a figure which shows the basic concept of the receiving system of the reference example 1 of this invention. It is a figure which shows an example of the concrete diversity television receiver of the reference example 2 of this invention. It is a figure which shows another example of the concrete diversity television receiver of the reference example 3 of this invention. It is a figure which shows another reference example of the concrete diversity television receiver of this invention. It is a figure which shows as a reference example 5 the reference example of the concrete millimeter wave antenna integrated up-converter (relay device) and millimeter wave antenna integrated down converter which comprise the receiving system of this invention. It is a figure which shows an example of the frequency diversity receiver of the reference example 6 of this invention. It is a diagram illustrating a reception system according shaped condition of the present invention.

Explanation of symbols

101 Terrestrial digital vision broadcast compatible TV 102, 202 Television broadcast receiving indoor antenna 103, 203, 303, 403, 521 Millimeter wave antenna integrated down-converter 104 Television broadcast receiving outdoor antenna 105, 501 Millimeter wave antenna integrated up-converter 204 , 408 Synthesizer 205, 304, 305, 404, 405 Tuner 306 Envelope level comparator 307 Switch 406 Phase detector 407 Phase shifter 502, 503, 504, 505 Band pass filter 506 Millimeter wave band filter 507 Phase synchronous oscillator 508 Eight multiplier 509 Mixer 510 Even harmonic mixer 511, 512, 513 Amplifier 514, 515 Divider 516 Synthesizer 517 Attenuator 518, 527 Antenna 522, 523 Amplifier 524 mm Filter 525 band-pass filter 526 mixer 700 rooms 701 television receiver 702 television broadcast receiving antenna 703 millimeter-wave antennas integrated down converter 704 television broadcast receiving antenna 704
705 Millimeter wave antenna integrated up-converter 707 TV signal 708 Millimeter wave signal

Claims (1)

All of the signals of the first radio signal wave band received by the antenna and installed on the veranda or the window of the house, and receiving an antenna of the first radio signal wave band of the UHF band Alternatively, a repeater that emits to the space as a signal of the second radio signal wave band of the millimeter wave band generated by frequency-converting a part,
Is installed in a room, a first receiving means for generating a signal of a first signal wave band by receiving a signal of the first radio signal wave band of the UHF band directly, the millimeter wave from the repeater And a second receiving means for receiving a signal in the second radio signal wave band and generating a signal in the second signal wave band, and signals in the first and second signal wave bands There reception system characterized in that it comprises a that have a television receiver main body input frequency diversity receiver.

Images