JP3431579B2 - Satellite receiving converter, block converter, down converter and satellite receiving system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite receiving system for receiving satellite signals of both BS and CS by the same antenna and transmitting them to a receiving end with one cable, and a satellite receiving converter suitable for the system. The present invention relates to a block converter and a down converter provided at a receiving end.

[0002]

2. Description of the Related Art The frequency bands and signal forms of BS signals and CS signals transmitted from satellites are, as shown in FIG. 2A, BS signals of 11.7 GHz to 12.2 GHz right-handed circular polarization (hereinafter right). Polarized), CS signal is 12.25 GHz
~ 12.73 GHz left-handed circularly polarized wave (hereinafter left-handed polarized wave)
And 12.27 GHz to 12.75 GHz are right polarized waves. Conventionally, a BS signal and a CS signal are separately received by a BS antenna 40 and a CS antenna 41 as shown in FIG. 9, and a CS signal is separately IF'd by two converters.
It is frequency-converted into a band and mixed and drawn into the room with one coaxial cable, or the CS received signal is converted into the IF band with one converter and drawn into the room with two coaxial cables. After that, only the CS right polarized signal was frequency-converted through a block converter, the left polarized wave and the frequency band were shifted, and the BS signal and the BS signal were transmitted by one coaxial cable. In addition, FIG. 9 shows the case of joint reception in the case of 5 floors, 3 is a VHF reception antenna, 4 is a UHF reception antenna, 42 is a mixer, 43 is a booster, 44 is a distributor, and 45 is a brancher. Is.

[0003]

However, BS signal and C
Since the right-polarized signal of the S signal has the same form except for the frequency, when the BS satellite and the CS satellite are in close proximity to each other or when they are the same satellite, the same probe, that is, the same It is possible to receive with the antenna. In this case, the BS signal is also received by the right polarization receiving probe of the two probes for receiving the CS left polarization signal and the CS right polarization signal provided on the antenna.

By doing so, the CS left polarized signal, the CS right polarized signal, and the BS signal can be converted into the IF band by one converter, but in this case, the CS signal is further converted to 1 band. A block converter is required to enable transmission with a book cable. However, when the above-mentioned conventional block converter is used, the BS signal superimposed on the CS signal is deleted or frequency-converted, so that it cannot be used. Furthermore, next CS
Since satellites are scheduled to be launched at 110 ° east, which is close to BS satellites, there is a demand for an inexpensive system capable of receiving BS and CS with one antenna.

Therefore, an object of the present invention is to transmit both BS and CS signals with a single cable even if the BS signal is superimposed on the CS right-hand circularly polarized signal, and to receive those signals at the receiving end. To provide a satellite receiving system capable of receiving, and a satellite receiving converter suitable for the satellite receiving system,
It is to provide block converters and down converters.

[0006]

In order to solve the above problems, a satellite receiver converter according to the invention of claim 1 has a first input section for inputting a received CS left-hand circularly polarized signal and a received CS right. Second input of circularly polarized signal and BS signal
BS signal, C from the low frequency on the frequency axis
And a converter section for converting to an intermediate frequency so that the S right-hand circularly polarized wave signal and the CS left-hand circularly polarized signal are arranged so as not to overlap in this order, and a signal from the first input section converted to the intermediate frequency is It is characterized in that the signal from the second input section converted into the intermediate frequency is mixed with both signals through the low-pass filter and can be output by one coaxial cable while passing through the high-pass filter. To do.

According to a second aspect of the present invention, there is provided a block converter in which the intermediate frequency signal of the CS left-hand circularly polarized signal is input.
Input section, a fourth input section for inputting an intermediate frequency signal of the CS right-hand circularly polarized wave signal and the BS signal, and an intermediate frequency signal of the BS signal and an intermediate frequency signal of the CS left-hand circularly polarized signal. The first filter circuit, the second filter circuit for extracting the intermediate frequency signal of the CS right-hand circularly polarized signal, and the extracted CS
Frequency conversion means for frequency-converting the right-handed circularly polarized wave signal to a second intermediate frequency higher than the intermediate frequency signal of the CS left-handed circularly polarized signal so as not to overlap on the frequency axis, and the CS converted to the second intermediate frequency A third filter circuit for mixing the right-handed circularly polarized signal with the mixed signal of the CS left-handed circularly polarized signal and the BS signal, and the mixed BS signal and CS signal can be output by one coaxial cable. It is characterized by having done.

[0008]

According to the third aspect of the present invention, in the down converter, one of the left-handed and right-handed circularly polarized signals is converted into the first intermediate frequency signal so that the CS circularly polarized wave is converted into the first intermediate frequency signal. A signal and one input section for inputting a CS signal transmitted by the other CS circularly polarized signal converted into the second intermediate frequency signal higher than the first intermediate frequency signal, and the first intermediate section inputted from the input section A fourth filter circuit for separating a frequency signal and the second intermediate frequency signal, and the separated first filter circuit
A first distributor for distributing one CS circularly polarized wave signal composed of an intermediate frequency signal, and a frequency conversion for frequency-converting the other CS circularly polarized wave signal composed of the separated second intermediate frequency signal into a first intermediate frequency signal Means, a second distributor for distributing the other CS circularly polarized signal converted into the first intermediate frequency signal, and an output switching for selecting one of the output signals of the first distributor and the second distributor It has a plurality of output terminals provided with means, and is capable of outputting by switching either one of the CS right-hand circularly polarized wave and the CS left-hand circularly polarized wave from the plurality of output terminals.

[0010]

According to a fourth aspect of the invention, in the third aspect of the invention, VHF, UHF, B from the lower frequency on the frequency axis
It is characterized in that signals transmitted by being arranged in the order of S and CS signals are input and VHF, UHF and BS signals can be constantly output from the output terminals.

[0012] In the satellite receiving system according to the invention of claim 5, an antenna section for receiving BS and CS signals by a common receiving section, and transmitting to the receiving end by one satellite cable by the satellite receiving converter according to claim 1. And a receiving end provided with the down converter according to claim 3 or 4.

According to a sixth aspect of the present invention, there is provided a satellite receiving system in which the BS and CS signals are received by a common receiving section, and all the received signals are frequency-converted with one local oscillation frequency. It is characterized by comprising an antenna section for transmitting to a receiving end with a single coaxial cable through the receiving end section and a receiving end section provided with the down converter according to claim 3 or 4.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an example of a satellite receiving system according to the present invention, showing a configuration of a satellite receiving antenna to which a block converter is connected and a receiving end provided with a down converter. In the figure, 1
Is a satellite receiving antenna, 2 is a block converter, 3 is V
The HF antenna, 4 is a UHF antenna, and 5 is a down converter.

The receiving probe of the satellite receiving antenna 1 includes a left polarized wave receiving probe 11a for receiving a CS left polarized signal in the primary radiator 10 and a right polarized wave receiving probe for receiving a BS signal and a CS right polarized signal. A converter unit 12 for converting the reception frequency to the IF band is formed continuously from the probe 11b. The converter unit 12 uses a local oscillation frequency of 10.678 GHz and a BS signal of 103
5 MHz to 1524 MHz, CS signals have left polarized signals of 1572 MHz to 2052 MHz, and right polarized signals have 159.
Output terminal 1 which is respectively converted to 2MHz to 2072MHz and is independent of left polarization signal, right polarization signal and BS signal
It is output from 3a and 13b.

The left polarized signal is input to the third input terminal 15a of the third and fourth input terminals of the block converter 2, and the right polarized signal and the BS signal are input to the fourth input terminal 15b. Entered in. In the block converter 2, the left polarization signal input from the third input terminal 15a is noise-removed through the high pass filter 16, the amplifier 17, the low pass 18 filter, etc., and is output from the output terminal 19. It The BS signal input to the fourth input terminal 15b is separated from the CS right polarized signal by the low pass filter 20, amplified together with the CS left polarized signal, and output from the output terminal 19. The CS right polarized signal is separated from the BS signal by the high-pass filter 21 and the local oscillation frequency 518M.
2110 MHz to 259 by the converter unit 14 of Hz.
It is frequency-converted to 0 MHz, and is output from the output terminal 19 together with the BS signal and the CS left polarization signal through the amplifier 22 and the high pass filter 23. At this time, each signal is separated and arranged on the frequency axis and output as shown in FIG. Further, (a) shows the reception frequency, and (b) shows the frequency after the 1F conversion. The set of the high pass filter 16 and the low pass filter 20 constitutes a first filter circuit, the high pass filter 21 constitutes a second filter circuit, and the low pass filter 18 and the high pass filter. A combination with the filter 23 constitutes a third filter circuit.

The output of the block converter 2 is transmitted by one coaxial cable 24, and the VHF antenna 3 and UH
The signal from the F antenna 4 is mixed by the mixer 25, and if necessary, is taken indoors via the booster 26.
The arrangement of each received signal in the cable at this point is as shown in FIG. Note that FIG. 1 shows a configuration for joint reception, and indoors shows a configuration in which it is wired to the receiving end of each home or each room via the branching device 28 and the distributor 29 and is connected to the VTR 7 or the television 8. ing.

Here, a down converter 5 as shown in the figure at the receiving end, that is, a switch 30 (output switching means) which has one signal input portion 9a and one output portion 9b and is switched by a voltage of 11V / 15V is provided. Having and 51
Figure 2 shows a CS right-polarized signal with a local oscillation frequency of 8 MHz.
As shown in (d), the frequency after IF conversion is 1592 MHz.
By providing the down-converter section 36 which is a frequency conversion means for re-converting to ~ 2072 MHz, the conventional commercially available CS tuner 6 for 2150 MHz can be used. In addition, the polarization switching signal (11V / 15V) output from the CS tuner 6 which supplies power by 11V / 15V voltage is detected by the polarization switching signal detection means (not shown), and the switching device 30 is automatically operated. If it is controlled to the CS mode, the user does not have to be aware of the switching device 30.
A right-handed signal and a left-handed signal can be switched and received, and the system becomes a good one.

As described above, by configuring the satellite receiving system using the block converter and the down converter, CS and BS signals received by the common receiving section can be transmitted by one cable, and BS and CS are It is possible to easily realize a system for receiving by using individual antennas. In addition, by configuring the block converter as described above, the converter output outputs CS left polarization and CS right polarization separately, and
Even if the BS signal is superimposed on the S right-handed circularly polarized wave, the CS right-polarized signal is converted to a frequency higher than the frequency band of the CS left-polarized signal without processing the BS signal, and the BS, C
Since the S left polarized wave and the CS right polarized wave are separately output on the frequency axis, the BS signal and the CS signal can be transmitted to the receiving end with one cable. Therefore, if one antenna has only one converter, B
Even if S and CS signals are received, B can be
Since the S and CS signals can be transmitted to the receiving end, it is possible to form an inexpensive receiving system. In addition, by reducing the number of receiving antennas, it is possible to obtain a satellite receiving system suitable from the viewpoint of the aesthetics of the town.

Further, by configuring the down converter as described above, the CS right-hand circular polarization and the CS left-hand circular polarization are I
Since it is converted back to the frequency band after F conversion and output by switching by the output switching means, the conventional C corresponding to 2150 MHz is used.
Both CS signals can be received by the S tuner.
Although the CS right polarized wave is converted to a high frequency band in the above-mentioned embodiment, the CS right polarized wave may not be converted after the IF return and the CS left polarized wave may be converted to a high frequency band. The down converter may frequency-convert the CS left polarized wave. Further, a booster may be built in the down converter 5, and the down converter 5e may be replaced by the booster 26 shown in FIG.
10 can be directly connected to the branching device 28 as shown in the block diagram of the main part of the satellite receiving system of FIG. 10, and when the CS broadcasting is received in another room, for example. Only the CS tuner needs to be moved.

FIG. 4 shows another embodiment of the satellite receiving system of the present invention, in which the block converter circuit shown in FIG. 1 is built in the converter portion of the antenna to form a satellite receiving converter. Further, the down converter provided at the receiving end is configured to have a distributor therein. Satellite receiving antenna 1 is 2
The first input section 32a and the second input section 32b of the converter section 32 receive the satellite signals received by the two probes 11a and 11b.
Input from the converter unit 12 and outputs both BS and CS signals.
After the IF conversion at, the CS right polarization is continuously frequency converted, and BS, CS left rotation, CS
They are arranged in the order of right-handed rotation, and each polarized wave is separated and output. In this way, the block converter circuit may be built in the antenna, and even if the BS signal is received by the same receiving unit in addition to the CS signal, those signals are separated on the frequency axis, so that one cable is used. And can be easily received at the receiving end. Further, by incorporating a distributor in the down converter, it is possible to simultaneously receive ground waves such as VHF and UHF simply by pulling one cable from the branching device 28.

FIG. 5 shows another form of the satellite receiving antenna. Explaining the differences from the antenna of FIG. 4 above,
Two transmitter circuits 12a and 12b are provided in the converter unit 12 that converts the received radio wave into an IF, and the CS left polarized wave and the BS and CS
Change the IF conversion frequency with the right polarization signal to change the CS left polarization to 2
Converting to the frequency band of 090 MHz to 2570 MHz, BS polarization is 1035 MHz to 1524 MHz, C
The S right polarized wave is converted into the frequency band of 1592 MHz to 2072 MHz. In this way, by performing IF conversion on the CS left polarized wave and the CS right polarized wave at different frequencies, it is possible to arrange BS, CS right polarized wave, and CS left polarized wave in order from the low frequency band at the time of IF conversion. There is no need to provide a block converter, the number of filter circuits can be reduced, and the circuit configuration can be simplified. In this case, the conventional CS tuner can be used by frequency-converting the CS left polarized wave in the down converter.

FIG. 6 shows another form of the down converter, which is provided with four output terminals 31 for outputting the signal transmitted from the antenna by one cable. In the figure, 34 is a power supply superimposing filter that supplies power to the antenna through a coaxial cable, 35 is a demultiplexing filter that is a fourth filter circuit that separates CS left polarization and right polarization, and 36 is CS right. It is a down-converter unit that frequency-converts polarized waves. 37a is a first distributor, 37b is a second distributor, and the first distributor 37a is 1592 MHz.
.About.2072 MHz frequency-converted CS right polarized wave is divided into 4 and connected to each output terminal 31 via the first switching unit 30a, and CS left polarized wave and BS signal are divided into 4 units and the second switching unit 30b is connected. It is connected to the output terminal 31 via. Each of the switching devices 30a and 30b is configured to perform switching operation by the 11 / 15V switching signal of the CS / BS tuner 39 connected to the output terminal 31.

Reference numeral 46 is a power supply separation filter for separating the switching voltage signal sent from the tuner, 47 is a relay drive circuit for detecting the 11 / 15V voltage and switching the switching devices 30a and 30b. Reference numeral 48 indicates a power supply unit. With this configuration, independent reception signals can be transmitted to the plurality of terminals. In this embodiment, it is premised that the BS and CS signals are transmitted, but a receiving system that transmits only CS signals can be used, and in that case, a CS tuner may be connected. .

FIG. 7 shows another form of the down converter. The difference from the configuration of FIG. 6 will be described. The distributor 3
The UHF, VHF, and BS signals divided into two by 7c are superimposed on both the CS left polarized wave and the CS right polarized wave, and only the CS right polarized wave is further separated. Reference numeral 35a is a demultiplexing filter, and 35b is a mixing filter. A down converter unit 36 is arranged between them to frequency-convert only CS right-polarized waves, and other VHF and UH.
The F and BS signals are in the through state. By doing so, whether the right or left polarized wave of CS is received by the CS / BS tuner 39, VHF, UHF and BS are received.
The signal can be constantly received.

FIG. 8 shows still another form of the down converter. Explaining the differences from the configuration of FIG. 6, CS
After the left polarization and the CS right polarization are separated by the demultiplexing filter 35, a demultiplexing filter 35c is further provided on the CS left polarization side to separate the VHF, UHF, BS signals and the CS left polarization, and 2
The mixing is performed again by the mixing filter 35d provided on the output side of the individual switching devices 30a and 30b. Even with this configuration, it is possible to receive VHF, UHF, and BS signals in parallel regardless of which polarization of the CS signal is being received. In addition, by outputting the reception signals other than the CS signal without passing through the switch in this way, it is possible to receive well without generating noise at the time of switching.

6 to 8, it is assumed that the CS frequency transmitted is a frequency band in which the CS right polarized wave is higher than the CS left polarized wave, but this may be reversed. If the CS left polarization is in the high frequency band, the CS left polarization may be frequency-converted by the down converter.

[0028]

As described in detail above, according to the satellite receiving converter of the invention of claim 1, in addition to the CS signal, B
Even if the S signal is received by the same receiving unit, since those signals are separated on the frequency axis, they can be transmitted by one cable,
It can be easily received at the receiving end. In addition, a configuration in which the number of receiving antennas is reduced and BS and CS signals are received by one antenna can be easily implemented at low cost. By reducing the number of receiving antennas, the aesthetics of the town can be improved.

According to the block converter of the second aspect, even if the BS signal is superposed on the CS right-hand circularly polarized wave and comes in, the BS signal and the CS signal are transmitted to the receiving end by one cable. it can. Therefore, the BS signal can be received by the CS antenna, and the number of receiving antennas can be reduced to reduce BS and C
The configuration for receiving the S signal by one antenna can be easily implemented at low cost. In addition, reducing the number of receiving antennas improves the aesthetics of the town.

According to the down converter of the third and fourth aspects of the present invention, the CS right-hand circularly polarized wave and the CS left-hand circularly polarized wave are switched and output in substantially the same frequency band.
A conventional CS tuner compatible with 2150 MHz allows both CS
It is possible to receive signals, and it is possible to transmit independent received signals to a plurality of terminals.

[0031]

According to the satellite receiving system of the fifth and sixth aspects of the invention, the CS and BS received by the common receiving section
The signal can be transmitted to the receiving end with one cable, and the receiving end can receive it with the conventional CS tuner.
An inexpensive system for receiving BS and CS with a single antenna can be easily implemented.

[Brief description of drawings]

FIG. 1 is a first embodiment of a satellite receiving system according to the present invention.
It is a block diagram which shows an example and shows the structure of an antenna, a block converter, and a receiving end.

FIG. 2 is a frequency spectrum showing the states of BS and CS signal frequencies and how the received signal is changed by the system of FIG. 1, where (a) is a signal transmitted from a satellite and (b) is a spectrum.
After IF conversion, (c) is each frequency spectrum of the block converter output of FIG. 1, and (d) is each frequency spectrum of the down converter output.

FIG. 3 is a frequency spectrum transmitted to each home.

FIG. 4 is a block diagram showing another embodiment of the satellite receiving system of the present invention.

FIG. 5 is a block diagram of a satellite receiving antenna, showing a main part of another embodiment of the satellite receiving system of the present invention.

FIG. 6 is a block diagram showing another form of a down converter.

FIG. 7 is a block diagram showing another form of a down converter.

FIG. 8 is a block diagram showing another form of a down converter.

FIG. 9 is a block diagram of a conventional satellite receiving system.

FIG. 10 is a principal block diagram showing another example of the satellite receiving system of the present invention.

[Explanation of symbols]

1. ・ Satellite receiving antenna, 2 ・ ・ Block converter,
5, 5a, 5e down converter, 9a down converter signal input section, 11a, left circularly polarized wave receiving probe, 11b, right circularly polarized wave receiving probe, 12
・ Converter section, 14 ・ ・ Converter section, 15a ・ ・ Third input terminal, 15b ・ ・ Fourth input terminal, 16 ・ ・ High-pass filter, 19 ・ ・ Output terminal, 20 ・ ・ Low-pass filter, 21..High pass filter, 24..Coaxial cable, 26a..Booster with built-in down converter, 29..Distributor, 30..Switch (output switching means), 30a..First switch, 30b ..Second switch,
31 ... Output terminal, 32 ... Converter unit, 32a ...
1st input part, 32b ... 2nd input part, 35 ... Demultiplexing filter, 36 ... Down converter part (frequency conversion means), 37a ... 1st distributor, 37b ... 2nd distributor.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-189036 (JP, A) JP-A-10-190505 (JP, A) JP-A-10-233706 (JP, A) JP-A-4 365228 (JP, A) JP 4-35228 (JP, A) JP 7-106997 (JP, A) JP 2000-299645 (JP, A) Jpn. 58) Fields surveyed (Int.Cl. ⁷ , DB name) H04B 1/18 H04N 7/20

Claims (6)

(57) [Claims] 1. A first input unit for inputting a received CS left-handed circularly polarized signal, a received CS right-handed circularly polarized signal and a BS.
Second input section for inputting signals, BS signal from the low frequency on the frequency axis, CS right-hand circular polarization
Arrange the signal and CS left-hand circularly polarized signal so that they do not overlap in this order.
Converter unit for converting to an intermediate frequency
And, Koikidori the signal from the first input unit is converted into an intermediate frequency
The second through the over-filter and converted to the intermediate frequency
The signal from the input section of the
A satellite receiving converter characterized in that signals can be mixed and output by one coaxial cable. 2. A third input section for inputting an intermediate frequency signal of a CS left-hand circularly polarized signal, a fourth input section for inputting an intermediate frequency signal of a CS right-hand circularly polarized signal and a BS signal, and a BS. signal
Intermediate frequency signal and CS left circularly polarized signal intermediate frequency signal
1st filter circuit for mixing and CS right-hand circularly polarized signal
Second filter circuit for extracting the intermediate frequency signal of
The emitted CS right-hand circularly polarized signals do not overlap on the frequency axis.
The second middle higher than the intermediate frequency signal of the CS left-hand circularly polarized signal
Frequency conversion means for frequency conversion into inter-frequency, and a second
The CS right-hand circularly polarized signal converted to the inter-frequency
Third mixed with mixed signal of circularly polarized signal and BS signal
A block converter having a filter circuit and capable of outputting mixed BS and CS signals through a single coaxial cable. 3. In order not to overlap on the frequency axis,
Converts left-handed and right-handed circularly polarized signals to the first intermediate frequency signal
One of the CS circularly polarized signals and the second intermediate higher than the first
Transmitted with the other CS circularly polarized signal converted to a frequency signal
One input section for inputting the received CS signal , the first intermediate frequency signal input from the input section, and
A fourth filter circuit for separating the second intermediate frequency signal
Path and one CS circular polarization consisting of the separated first intermediate frequency signal.
First CS divider for distributing the wave signal and the other CS circular polarization composed of the separated second intermediate frequency signal.
Frequency conversion means for frequency converting a wave signal into a first intermediate frequency signal, and the other CS circular polarization signal converted into the first intermediate frequency signal
And a second distributor for distributing the signal, and an output signal of either the first distributor or the second distributor.
A plurality of output terminals equipped with output switching means for selecting a signal
And a CS right-hand circular polarization and a CS left-hand circular polarization from the plurality of output terminals.
A down converter characterized in that either one of the above can be switched to output . 4. VHF, U from the low frequency on the frequency axis
HF, BS, enter the signal came transmitted are arranged in the order of CS signals, VHF, UHF, downconverters according to claim 3, capable of outputting constantly BS signal from the output terminal. 5. An antenna section for receiving a BS signal and a CS signal by a common receiving section, and transmitting the BS and CS signals to a receiving end by one satellite cable by the satellite receiving converter according to claim 1, and the antenna section according to claim 3 or 4. A satellite receiving system comprising a receiving end provided with a down converter. 6. The BS and CS signals are received by a common receiver, and all the received signals are frequency-converted at one local oscillation frequency , and 1 is transmitted via the block converter according to claim 2.
A satellite receiving system comprising: an antenna section for transmitting to a receiving end by a coaxial cable of the present invention; and a receiving end section provided with the down converter according to claim 3 or 4 .