JPH11145870A - Converter for receiving circularly polarized wave/ linearly polarized wave - Google Patents

Abstract

PROBLEM TO BE SOLVED: To concurrently receive with one antenna radio waves, from two satellites of different polarizing systems in identical orbit. SOLUTION: A horn circuit 1 receives the signal of a vertically polarized wave sent from a satellite through a substrate probe 2 for vertically polarized wave reception and receives the signal of a horizontally polarized wave through a substrate probe 3 for horizontally polarized wave reception. A 90 deg. phase synthesizer 5 receives a circularly polarized wave by synthesizing two received vertically and horizontally polarized waves while delaying one of them by a phase of 90 deg.. The received signal of this circularly polarized wave is converted to the signal of a first intermediate frequency(IF) band by a frequency converter 8. In addition, the received signals of vertically and horizontally polarized waves are switched by a changeover switch 11, in response to a switching signal CH from a tuner and converted to a second IF band by a frequency converter 12. These signals of the first and the second IF bands are mixed by a mixer 16 and sent from an output terminal 19 via a coaxial cable to the tuner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circularly polarized wave provided in an antenna for receiving satellite broadcasting and satellite communication.
The present invention relates to a converter for receiving linearly polarized waves.

[0002]

2. Description of the Related Art When two satellites are in the same orbit and are broadcast or communicated from these satellites in different polarization systems, that is, in a circular polarization and a linear polarization (vertical and horizontal), these polarizations are used. Conventionally, two different antenna devices are used to receive radio waves of different systems.

[0003]

In order to receive radio waves from two satellites in the same orbit and having different polarization systems as described above, two antenna units are required, and installation of the antenna units is required. There is a problem that it is troublesome and its installation cost is high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and a circularly polarized wave capable of receiving radio waves from two satellites having different polarization systems on the same orbit with one antenna device. -To provide a converter for linearly polarized wave reception.

[0005]

According to a first aspect of the present invention, there is provided a converter for receiving a circularly polarized wave and a linearly polarized wave, comprising:
A horn circuit including a vertical polarization receiving substrate probe and a horizontal polarization receiving substrate probe in a circular polarization / linear polarization reception converter for receiving circular polarization and linear polarization signals transmitted from two satellites And the reception signals of the vertical polarization reception substrate probe and the horizontal polarization reception substrate probe
A 90-degree phase combiner that receives a circularly polarized wave by combining with a phase difference of 0 degree, and converts a received signal of a circularly polarized wave output from the 90-degree phase combiner into a signal of a first intermediate frequency band. First
A frequency conversion means, a switch for switching and outputting a signal of linear polarization received by the substrate probe for vertical polarization reception and the substrate probe for horizontal polarization reception by a switching signal from a tuner, A second frequency converter for converting the selected linearly polarized signal into a signal of the second intermediate frequency band, and a first frequency converter converted by the first frequency converter.
A mixer for mixing and outputting the signal of the intermediate frequency band and the signal of the second intermediate frequency band converted by the second frequency converting means.

According to a second aspect of the present invention, a signal in the first intermediate frequency band converted by the first frequency converting means and converted by the second frequency converting means in place of the mixer in the first aspect. A switching device is provided which switches and outputs a signal of the second intermediate frequency band with a switching signal from a tuner.

According to a third aspect of the present invention, there are provided first, second, and third conversion units for converting a circularly polarized reception signal, a vertically polarized reception signal, and a horizontally polarized reception signal into intermediate frequency band signals. A frequency conversion unit for outputting a circularly polarized signal output from the first frequency conversion unit from a first output terminal and a linearly polarized signal output from the second and third frequency conversion units; Are mixed and output from the second output terminal.

According to a fourth aspect of the present invention, there are provided first, second, and third conversion units for converting a circularly polarized reception signal, a vertically polarized reception signal, and a horizontally polarized reception signal into signals in an intermediate frequency band. The frequency conversion means is provided, and the signals subjected to the frequency conversion by the respective frequency conversion means are output from first, second, and third output terminals provided independently of each other.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a block diagram of a horn-integrated converter that receives radio waves from two satellites in the same orbit and having different polarization systems with a single antenna device.

In FIG. 1, reference numeral 1 denotes a horn circuit section to which a circularly polarized wave and a linearly polarized wave transmitted from a satellite are inputted. In the horn circuit section 1, a vertically polarized wave receiving substrate probe 2 is vertically positioned. And the horizontal polarized wave receiving substrate probe 3
Are provided so as to be positioned horizontally.

The output signal of the vertical polarization receiving substrate probe 2 is amplified by an RF (high frequency) amplifier 4 and input to a 90-degree phase synthesizer 5. The output signal of the horizontally polarized wave receiving substrate probe 3 is the same as that of the vertically polarized wave.
The signal is amplified by the amplifier 6 and input to the 90-degree phase synthesizer 5.

The 90-degree phase synthesizer 5 includes a vertically polarized wave and a horizontally polarized light which are linearly polarized waves received by the vertically polarized wave receiving substrate probe 2 and the horizontally polarized wave receiving substrate probe 3 having a 90 degree angle difference. Circularly polarized waves are received by combining one of the two split waves with a phase delay of 90 degrees.
The circularly polarized reception signal output from the 90-degree phase synthesizer 5 is amplified by the RF amplifier 7 and input to the frequency converter 8.

The vertically polarized and horizontally polarized reception signals output from the RF amplifiers 4 and 6 are amplified by RF amplifiers 9 and 10, respectively, and are supplied to different terminals a and
b. The switch 11 switches the signals input to the terminals a and b according to a channel switching signal CH from a tuner (not shown) and inputs the signals to the frequency converter 12. The frequency converters 8 and 12 are supplied with a local oscillation signal from a local oscillator 13.

The frequency converter 8 mixes the circularly polarized reception signal output from the RF amplifier 7 with the local oscillation signal of the local oscillator 13, converts the signal into a first intermediate frequency band signal, and outputs the signal. . The intermediate frequency signal output from the frequency converter 8 is amplified by IF (intermediate frequency) amplifiers 14 and 15 and input to the mixer 16.

The frequency converter 12 mixes the vertically or horizontally polarized reception signal selected by the switch 11 with the local oscillation signal output from the local oscillator 13,
The signal is converted into a signal of the second intermediate frequency band and output. The signal of the second intermediate frequency band output from the frequency converter 12 is amplified by IF amplifiers 17 and 18 and input to the mixer 16. The mixer 16 mixes the circularly polarized reception signal output from the IF amplifier 15 and the linearly polarized signal output from the IF amplifier 18 and outputs the mixed signal from an output terminal 19. The output terminal 19 is connected to a tuner for receiving BS broadcast and CS broadcast via a coaxial cable (not shown).

Next, the operation of the above embodiment will be described. The horn circuit unit 1 receives the vertically polarized signal transmitted from the satellite by the vertically polarized wave receiving substrate probe 2, and receives the horizontally polarized wave signal by the horizontal polarized wave receiving substrate probe 3. The signals received by the probes 2 and 3 are amplified by RF amplifiers 4 and 6, respectively, and input to the 90-degree phase synthesizer 5.
The 90-degree phase combiner 5 splits one of the two vertically polarized waves and the horizontally polarized waves having a 90-degree angle difference into 90 degrees.
Circularly polarized waves are received by combining the signals with a phase delay. This circularly polarized reception signal is amplified by the RF amplifier 7 and then converted by the frequency converter 8 into a signal in the first intermediate frequency band.

The vertically polarized and horizontally polarized reception signals output from the RF amplifiers 4 and 6 are amplified by RF amplifiers 9 and 10, respectively, and then switched by a switch 11 to a channel switching signal CH from a tuner. , And converted by the frequency converter 12 into a signal of the second intermediate frequency band.

Now, as shown in FIG. 2, the frequency band of a satellite transmitting circularly polarized waves is 11.7 GHz to 12.0 GHz.
When the frequency band of the satellite transmitting linearly polarized waves (vertically polarized waves and horizontally polarized waves) is 12.20 GHz to 12.75 GHz, the local oscillation frequency Lo of the local oscillator 13 is set to 10.67.
Assuming that the frequency is 8 GHz, the circularly polarized reception frequency (11.
7 GHz to 12.0 GHz) is 1022 M
It is converted into a signal of a first intermediate frequency band of Hz to 1322 MHz. Further, the frequency (12.20 GHz to 12.75 GHz) of the linearly polarized wave (vertically polarized wave, horizontal polarized wave) is converted by the frequency converter 12 into a signal of the second intermediate frequency band of 1522 MHz to 2072 MHz.

The signal of the first intermediate frequency band converted by the frequency converter 8 and the signal of the second intermediate frequency band converted by the frequency converter 12 are IF amplifiers 14 and 15 and IF amplifier 17 respectively. , 18 are mixed by a mixer 16 and sent from an output terminal 19 to a tuner for receiving BS broadcasts and CS broadcasts via a coaxial cable.

According to the above-described embodiment, one local oscillator 13 converts circularly polarized waves and linearly polarized waves (vertically polarized waves and horizontally polarized waves) into the first intermediate frequency band and the second intermediate frequency band having different frequency bands. The signal can be converted to a signal, and the received signal can be sent to the tuner via one coaxial cable.

For example, circularly polarized waves are BS broadcasts, and linearly polarized waves are CS broadcasts.
In the case of broadcasting, the received signals of the BS broadcast and the CS broadcast are converted into signals of the first intermediate frequency band and the second intermediate frequency band, and sent to the BS and CS receiving tuners from the output terminal 19 via one coaxial cable. , The BS broadcast and the CS broadcast can be simultaneously watched by the respective tuners. in this case,
Switching between vertical and horizontal polarization signals of the CS broadcast is automatically performed by the switch 11 by recognizing the channel switching signal CH output from the tuner.

(Second Embodiment) Next, a circularly-polarized / linearly-polarized wave receiving converter according to a second embodiment of the present invention will be described with reference to FIGS.

The second embodiment is an example of a case in which a circularly polarized BS broadcast and a linearly polarized CS broadcast are switched and received. In addition, the first
The same parts as those of the embodiment are denoted by the same reference numerals, and detailed description is omitted.

In the second embodiment, as shown in FIG. 3, a first local oscillator 13 for a circularly polarized frequency converter 8 is provided.
a and a second local oscillator 13b for the frequency converter 12 for linear polarization are separately provided. The first local oscillator 13a has a local oscillation frequency Lo of, for example, 10.678.
The local oscillation frequency Lo of the second local oscillator 13b is set to, for example, 11.2 GHz.

The signal of the first intermediate frequency band output from the frequency converter 8 and the signal of the second intermediate frequency band output from the frequency converter 12 are supplied to different terminals a and b of the switch 21. Is entered. The switch 21 has terminals a,
The signal input to b is switched by a switching signal from the tuner, and is output to the output terminal 19 via IF amplifiers 22 and 23.

In the above configuration, as shown in FIG.
A circularly polarized signal having a frequency band of 11.7 GHz to 12.0 GHz output from the 90-degree phase synthesizer 5 via the RF amplifier 7 is output from the frequency converter 8 at a frequency of 1022 MHz to 1
It is converted into a signal of the first intermediate frequency band of 322 MHz.
In addition, 12.20 GHz-1.
A signal of linear polarization (vertical polarization, horizontal polarization) having a frequency band of 2.75 GHz is converted to 1000 by the frequency converter 12.
The signal is converted into a signal of a second intermediate frequency band of MHz to 1550 MHz.

The signal of the first intermediate frequency band converted by the frequency converter 8 and the signal of the second intermediate frequency band converted by the frequency converter 12 are converted into one of the two signals by a switch 21 linked with the tuner. The signal is selected and IF amplifier 2
The signal is amplified by 2 and 23 and sent from the output terminal 19 to the tuner via a coaxial cable.

According to the second embodiment, since the switch 21 is switched in conjunction with the tuner, the circularly polarized wave B
S broadcast and linearly polarized CS broadcast can be arbitrarily switched and received by operation of a tuner.

(Third Embodiment) Next, a circularly polarized wave / linearly polarized wave receiving converter according to a third embodiment of the present invention will be described with reference to FIGS.

The third embodiment shows an example in which a circularly polarized BS broadcast and a linearly polarized CS broadcast are output from separate output terminals. The same parts as those in the first and second embodiments are denoted by the same reference numerals, and detailed description is omitted.

In the third embodiment, as shown in FIG. 5, a first local oscillator 13 for a circularly polarized frequency converter 8 is provided.
a and a second local oscillator 13b for the vertical polarization frequency converter 12 are separately provided. The first local oscillator 13a has a local oscillation frequency Lo of, for example, 10.678.
The local oscillation frequency Lo of the second local oscillator 13b is set to, for example, 11.3 GHz.

The signal of the first intermediate frequency band converted by the frequency converter 8 is output to the first output terminal 19a via the IF amplifiers 14 and 15. The frequency converter 12 converts the vertically polarized reception signal amplified by the RF amplifier 9 into a signal of the second intermediate frequency band, and
Input to the mixer 16 via 7 and 18.

The horizontally polarized reception signal output from the RF amplifier 10 is input to the frequency converter 25. This frequency converter 25 has a local oscillation signal (Lo: 10.678 GHz) output from the first local oscillator 13 a.
z) is input. The frequency converter 25 is an RF amplifier 1
The received signal of horizontal polarization output from 0 is converted into a signal of the third intermediate frequency band, amplified by IF amplifiers 26 and 27, and then input to the mixer 16. The mixer 16 outputs the signal of the second intermediate frequency band output from the IF amplifier 18 and the I
The signal of the third intermediate frequency band output from the F amplifier 27 is mixed and output to the second output terminal 19b. The signal output from the first output terminal 19a is sent to a BS receiving tuner via a coaxial cable, and the signal output from the second output terminal 19b is sent to a CS receiving tuner via a coaxial cable. Can be

In the above configuration, as shown in FIG.
11.7 GHz to 12.0 output from RF amplifier 7
A signal of a circularly polarized wave (BS broadcast) having a frequency band of GHz is 1022 MHz to 1322 MHz by the frequency converter 8.
Of the first intermediate frequency band of the IF amplifier 1
After being amplified at 4 and 15, the signal is sent from the first output terminal 19a to the BS tuner via a coaxial cable.

A vertically polarized (CS broadcast) signal having a frequency band of 12.20 GHz to 12.75 GHz received by the vertically polarized wave receiving substrate probe 2 is converted by the frequency converter 12 into a 900 MHz to 1450 MHz signal. The signal is converted into a signal of two intermediate frequency bands and sent to the mixer 16 via IF amplifiers 17 and 18.

Further, the horizontally polarized (CS broadcast) signal having a frequency band of 12.20 GHz to 12.75 GHz received by the horizontally polarized wave receiving substrate probe 3 is converted by the frequency converter 25 into a 1522 MHz to 2072 MHz signal. The signal is converted into a signal of three intermediate frequency bands and sent to the mixer 16 via IF amplifiers 26 and 27. The mixer 16 mixes the signal of the second intermediate frequency band (vertical polarization) output from the IF amplifier 18 with the signal of the third intermediate frequency band (horizontal polarization) output from the IF amplifier 27. , 900MHz-20
The signal is transmitted as a 72 MHz signal from the second output terminal 19b to a tuner for CS reception via a coaxial cable.

As described above, in the third embodiment, the first output terminal 19a for the BS broadcast and the second output terminal 19b for the CS broadcast are separately provided, so that the BS broadcast and the CS broadcast can be simultaneously performed. Can be received. Also, since the vertically polarized signal and the horizontally polarized signal are mixed in different frequency bands at the second output terminal 19b, the CS output output from the second output terminal 19b via the coaxial cable is distributed. By doing so, it is possible to simultaneously receive with a plurality of CS tuners.

(Fourth Embodiment) Next, a circularly-polarized / linearly-polarized wave receiving converter according to a third embodiment of the present invention will be described with reference to FIGS.

In the fourth embodiment, an output terminal is additionally provided to the third embodiment, and a circularly polarized BS broadcast, a vertically polarized CS broadcast, and a horizontally polarized CS broadcast are provided. They are configured to output from separate output terminals. The same parts as those in the third embodiment are denoted by the same reference numerals, and detailed description is omitted.

In the fourth embodiment, as shown in FIG. 7, a dedicated first local oscillator 13a is provided for the frequency converter 8 for circular polarization, and the frequency converter 12 for vertical polarization and the horizontal A shared second local oscillator 13b is provided for the wave frequency converter 25. The first local oscillator 13a includes:
The local oscillation frequency Lo is set to, for example, 10.678 GHz, and the local oscillation frequency Lo of the second local oscillator 13b is set to, for example, 11.2 GHz.

The output signal of the circular polarization IF amplifier 15 is supplied to a first output terminal 19a, and the vertical polarization IF amplifier 18
Is output to the second output terminal 19b, and the output signal of the horizontal polarization IF amplifier 27 is output to the third output terminal 19c.

According to the fourth embodiment, as shown in FIG. 8, the first output terminal 19a outputs the first intermediate frequency band 1
A circularly polarized signal (BS broadcast) of 022 MHz to 1322 MHz, and a vertically polarized signal (CS) of 1000 MHz to 1550 MHz, which is a second intermediate frequency band, from the second output terminal 19b.
Broadcast), a horizontal polarization signal (C) of 1000 MHz to 1550 MHz, which is the second intermediate frequency band, from the third output terminal 19c.
S broadcast) can be output separately. The fourth embodiment is used when BS broadcast, CS vertical polarization, and CS horizontal polarization signals are separately required for co-listening of an apartment house or retransmission of CATV or the like.

[0043]

As described above in detail, according to the present invention, a circularly polarized wave and a linearly polarized signal transmitted from two satellites in the same orbit are used for a vertical polarization receiving substrate probe of a horn circuit section, and The signal is received by the horizontally polarized wave receiving substrate probe, and the vertical and horizontal received signals are combined by the 90-degree phase combiner 5 to receive a circularly polarized wave, and the received signal is converted into a signal of the first intermediate frequency band. Further, the linearly polarized signal received by the vertical polarization receiving substrate probe and the horizontal polarization receiving substrate probe is switched by a switching signal from a tuner, and the selected linearly polarized signal is converted to a second intermediate signal. Since the signal is converted into a signal in a frequency band, and the signals in the first intermediate frequency band and the second intermediate frequency band are mixed and output, one antenna device uses different polarization systems on the same track. Radio waves from two satellites , It is possible to receive the BS broadcasting and CS broadcasting at the same time.

Further, according to the present invention, a switch is provided in place of the mixer, and the first frequency converted by the first frequency converting means is provided.
The signal of the intermediate frequency band and the signal of the second intermediate frequency band converted by the second frequency conversion means are switched and output by the switching signal from the tuner, so that the BS broadcast and the CS broadcast are linked to the tuner. You can switch between and see.

The present invention also provides first, second, and third frequency converters for converting a circularly-polarized received signal, a vertically-polarized received signal, and a horizontally-polarized received signal into intermediate frequency band signals, respectively. Means for outputting a circularly polarized signal output from the first frequency conversion means from a first output terminal, and a vertical polarization and a horizontal polarization output from the second and third frequency conversion means. Are mixed and output from the second output terminal, so that BS broadcast and CS broadcast are respectively distributed and
Can be seen on multiple tuners.

Further, the present invention provides first, second, and third frequency conversions for converting a circularly-polarized received signal, a vertically-polarized received signal, and a horizontally-polarized received signal into signals in an intermediate frequency band, respectively. Means are provided, and the signals subjected to frequency conversion by the respective frequency conversion means are output from the first, second, and third output terminals provided independently of each other, so that BS broadcasting, CS vertical polarization, CS horizontal It can receive the broadcast of the polarized wave independently, and can be used for co-listening of an apartment house or retransmission of CATV or the like.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a co-listening converter according to a first embodiment of the present invention.

FIG. 2 is an exemplary view showing frequency bands for describing a frequency conversion operation in the embodiment.

FIG. 3 is a block diagram showing a configuration of a co-listening converter according to a second embodiment of the present invention.

FIG. 4 is an exemplary view showing a frequency band for describing a frequency conversion operation in the embodiment.

FIG. 5 is a block diagram showing a configuration of a co-listening converter according to a third embodiment of the present invention.

FIG. 6 is an exemplary view showing a frequency band for describing a frequency conversion operation in the embodiment.

FIG. 7 is a block diagram illustrating a configuration of a co-listening converter according to a fourth embodiment of the present invention.

FIG. 8 is a view showing a frequency band for describing a frequency conversion operation in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Horn circuit part 2 Vertically polarized wave receiving substrate probe 3 Horizontally polarized wave receiving substrate probe 4, 6, 7, 9, 10 RF amplifier 5 90 degree phase synthesizer 8, 12, 25 Frequency converter 11, 21 Switcher 13 Local oscillator 14, 15, 17, 18, 22 IF amplifier 16 Mixer 19, 19a, 19b, 19c Output terminal

Claims (4)

[Claims] 1. A circular polarization / linear polarization reception converter for receiving circular polarization and linear polarization signals transmitted from two satellites in the same orbit, comprising: a substrate probe for vertical polarization reception; A horn circuit section having a wave receiving substrate probe, and receiving signals of the vertical polarization receiving substrate probe and the horizontal polarization receiving substrate probe with a phase difference of 90 degrees to receive a circularly polarized wave. Degree phase synthesizer, first frequency conversion means for converting a circularly polarized reception signal output from the 90 degree phase synthesizer into a signal in a first intermediate frequency band, the vertical polarization reception board probe, and A switch for switching the linearly polarized wave signal received by the horizontally polarized wave receiving substrate probe according to the switching signal from the tuner and outputting the signal; and converting the linearly polarized wave signal selected by the switcher to a second intermediate frequency band. Second to convert to signal A frequency converter, and a mixer that mixes and outputs the signal of the first intermediate frequency band converted by the first frequency converter and the signal of the second intermediate frequency band converted by the second frequency converter. A converter for receiving circularly polarized waves and linearly polarized waves, comprising: 2. A circular polarization / linear polarization reception converter for receiving circular polarization and linear polarization signals transmitted from two satellites in the same orbit, comprising: a vertical polarization receiving substrate probe; A horn circuit section having a wave receiving substrate probe, and receiving signals of the vertical polarization receiving substrate probe and the horizontal polarization receiving substrate probe with a phase difference of 90 degrees to receive a circularly polarized wave. Degree phase synthesizer; first frequency conversion means for converting a circularly polarized reception signal output from the 90 degree phase synthesizer into a signal of a first intermediate frequency band; A first switch for switching and outputting a linearly polarized signal received by the horizontally polarized wave receiving substrate probe by a switching signal from a tuner; and a linearly polarized signal selected by the first switch. For signals in the second intermediate frequency band A second frequency converting means for converting the first intermediate frequency band signal converted by the first frequency converting means and a second intermediate frequency band signal converted by the second frequency converting means from the tuner. And a second switch for switching and outputting according to the switching signal. 3. A circular polarization / linear polarization reception converter for receiving circular polarization and linear polarization signals transmitted from two satellites in the same orbit, comprising: a vertical polarization reception substrate probe; A horn circuit section having a wave receiving substrate probe, and receiving signals of the vertical polarization receiving substrate probe and the horizontal polarization receiving substrate probe with a phase difference of 90 degrees to receive a circularly polarized wave. Degree phase combiner, first frequency conversion means for converting a circularly polarized reception signal output from the 90 degree phase combiner into a signal in a first intermediate frequency band, and conversion by the first frequency conversion means A first output terminal for outputting the signal of the first intermediate frequency band to the outside, and a second output terminal for converting the signal of the vertical polarization received by the substrate probe for vertical polarization reception into a signal of the second intermediate frequency band. 2 frequency conversion means, and the water Third frequency conversion means for converting a horizontally polarized signal received by the substrate probe for flat polarization reception into a signal of a third intermediate frequency band, and a second intermediate frequency converted by the second frequency conversion means A mixer for mixing the band signal and the signal of the third intermediate frequency band converted by the third frequency conversion means, and a second for outputting the signal mixed by the mixer to the outside.
A converter for receiving circularly polarized waves and linearly polarized waves, comprising: an output terminal; 4. A circular polarization / linear polarization reception converter for receiving circular polarization and linear polarization signals transmitted from two satellites in the same orbit, comprising: a substrate probe for vertical polarization reception; A horn circuit section having a wave receiving substrate probe, and receiving signals of the vertical polarization receiving substrate probe and the horizontal polarization receiving substrate probe with a phase difference of 90 degrees to receive a circularly polarized wave. Degree phase synthesizer; first frequency conversion means for converting a circularly polarized reception signal output from the 90 degree phase synthesizer into an intermediate frequency band signal; and frequency conversion by the first frequency conversion means. A first output terminal for outputting the output signal to the outside, a second frequency conversion means for converting a vertically polarized signal received by the vertically polarized wave receiving substrate probe into an intermediate frequency band signal, 2 frequency conversion means A second output terminal for outputting a more frequency-converted signal to the outside, and a third frequency conversion means for converting a vertically polarized signal received by the horizontal polarized wave receiving substrate probe into an intermediate frequency band signal. And a third output terminal for outputting a signal whose frequency has been converted by the third frequency conversion means to the outside.