JPH0878960A - Telemeter receiver - Google Patents

Abstract

PURPOSE: To improve the efficiency of frequency utilization by extracting right- hand and left-hand circular polarization telemeter signal components by distributing and synthesizing the right-hand and left-hand circular polarization telemeter signals of the same frequency inputted by two antennas as required, performing reception and demodulation and recording those signal components. CONSTITUTION: The right-hand and left-hand polarization telemeter signals through two antennas 1a and 1b are processed by first and second distributors 4a and 4b, first +π/2 phase shifter 13a, second -π/2 phase shifter 13b and first and second synthesizers 5a and 5b, and the right-hand and left-hand circular polarization telemeter signal components are extracted by the respective synthesizers 5a and 5b. Then, these components are received/demodulated by respectively correspondent systems and recorded by a recorder 12. Thus, the efficiency of frequency utilization is improved, the telemeter signals can be received with satisfactory reception sensitivity over a wide angle range and they can be reproduced/analyzed in real time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-board reception type telemeter receiver for receiving and recording a telemeter signal emitted from a telemeter transmitter.

The telemeter transmitter is mounted on a missile, a rocket, etc., and after processing the internal signal of the system under test such as signal processing, multiplexing processing, modulation, etc., the telemeter signal is radiated into space from the antenna. It is a device.

The telemeter receiver is a device used in pair with the telemeter transmitter to receive and record the telemeter signal radiated by the telemeter transmitter.

The telemeter measurement of missiles and the like in Japan is often carried out in a sea area or the like far from the ground to avoid danger. Since the telemeter transmitter is mounted on a moving body such as a missile, the directivity of the antenna is often close to omnidirectional in order to cope with frequent changes in the relative angle with the receiver due to movement of the transmitter. Therefore, the gain must be lowered. In addition, it is difficult to mount a high-power transmitter because the mass and dimensions are extremely limited.
Since the frequency and output of the transmission signal are limited by the Radio Law, it is extremely difficult to install the telemeter receiver on the ground or the like and receive the telemeter signal. Therefore, a telemeter receiver is installed on an aircraft, etc., the telemeter signal is received and recorded near the telemeter transmitter, the recorded telemeter data is brought back to the ground, and after being subjected to processing such as demodulation and signal processing at ground equipment, it is played back.・ A method of analysis is being implemented.

In the on-board reception type telemeter receiver used for measuring the internal signal of the missile, the components of the telemeter receiver are mounted in the aircraft, and the radar antenna of the aircraft is replaced with the antenna of the telemeter receiver. Although the type that was used was the mainstream, it had the drawback that the aircraft had to be extensively refurbished and that the original functions of the aircraft were restricted by the refurbishment.

In recent years, due to the requirement that the number of repairs to the aircraft be minimized and that the telemeter signals be received without impairing the original functions of the aircraft as much as possible, an on-board reception type external to the aircraft has been proposed. A telemeter receiver was devised. As an example, there is an on-board reception type telemeter receiving device in which various components such as an antenna are mounted inside a casing that is a refurbished fuel tank of an aircraft.

[0007]

2. Description of the Related Art FIG. 5 shows an example of a conventional on-board reception type telemeter receiver. In FIG. 5, 1 is a telemeter transmitter, 2 is a telemeter signal, and 3 is a telemeter signal.
Is an antenna, 4 is a distributor, 6a to 6c are first to third filters, 7 is an amplifier, 8 is a local oscillator, 9 is a mixer, 1
Reference numeral 0 is a main carrier demodulator, 11 is a subcarrier demodulator, and 12 is a recording device.

The conventional on-board reception type telemeter receiver is constructed as described above, and the telemeter signal 2 transmitted from the telemeter transmitter 1 is received by the antenna 3 and input to the first filter 6a. Here, the telemeter transmitter 1 is mounted on a system under test such as a missile,
The telemeter signal 2 is radiated into space by the telemeter transmitter 1, and is a signal obtained by subjecting the internal signal of the system under measurement to signal processing, multiplexing, modulation and the like. An example of the telemeter signal 2 is shown in FIGS. 6 (a) and 6 (b). Figure 6
6A shows the relationship between time and frequency of this telemeter signal, and FIG. 6B shows the relationship between frequency and power. 6 (a) and 6 (b) are analog signals and several types of 2
In this example, a PCM signal obtained by time-division-multiplexing value data is frequency-multiplexed with an FSK signal obtained by performing subcarrier modulation, and FM modulation is performed as main carrier modulation.

The first filter 6a removes noise outside the band of the input telemeter signal 2 and outputs it to the amplifier 7. The amplifier 7 amplifies the input signal and outputs it to the mixer 9. The mixer 9 down-converts the input signal by the local signal from the local oscillator 8 and outputs it to the main carrier demodulator 10. The main carrier demodulator 10 demodulates the main carrier from the input signal as shown in FIG. FIG. 7 shows a state in which FM demodulation is performed as an example.

The distributor 4 distributes the input signal and outputs it to the second filter 6b and the third filter 6c. The second filter 6b and the third filter 6c separate and extract the frequency-multiplexed input signal as shown in FIG. 8 by passing only the signal within the band of the filter.
The subcarrier demodulator 11 demodulates the subcarrier with respect to the input signal from the third filter 6c as shown in FIG. 9 and outputs it. FIG. 9 shows an example in which FSK demodulation is performed to restore a PCM signal. The recording device 12 records the input signals from the second filter 6b and the subcarrier demodulator 11 in each channel.

In this way, the telemeter data recorded by the recording device 12 is brought back to the ground, subjected to processing such as demodulation and signal processing, and then reproduced and analyzed.

[0012]

In the conventional on-board reception type telemeter receiver as described above, for the purpose of evaluating the influence of simultaneous launch of the system under test such as a missile,
When it is necessary to simultaneously receive telemeter signals from two systems to be measured, two kinds of frequencies of the telemeter signals must be set, which causes a problem of occupying a wide frequency range.

[0013] Further, since it is an on-board receiving type telemeter receiving device in which a fuel tank or the like is modified and is used by being installed under the wing of an aircraft, it is used for a telemeter signal coming from a direction in which it is shaded by the fuselage or wing of the aircraft. Therefore, there is a problem that the operation range is limited because the reception sensitivity is lowered and the degree of freedom of formation for obtaining good reception sensitivity is reduced.

Further, the acquired data is recorded by a recording device, the recording medium is brought back to the ground after the flight, and separately,
There is a problem that the validity of the acquired data cannot be evaluated during the flight because it is played back and analyzed.

The present invention has been made to solve the above problems, and it is possible to simultaneously receive telemeter signals from two measured systems of the same frequency and to use the on-board reception type telemeter with high frequency utilization efficiency. The purpose is to get the device.

It is another object of the present invention to provide an on-board reception type telemeter receiving device which can receive a telemeter signal with a good receiving sensitivity over a wide angle range and has a high degree of freedom in formation.

Another object of the present invention is to obtain an on-board reception type telemeter receiving device capable of reproducing / analyzing a received telemeter signal in real time and evaluating the validity of acquired data during flight.

[0018]

In a telemeter receiver of the on-board reception type according to the present invention, a first distributor and a second distributor are connected to two antennas, and the first distributor and the second distributor are connected to each other. One output end is connected to the first combiner, and one output end of the second distributor is connected to the first combiner via a (+ π / 2) phase shifter to make the first distributor. The other output end of the converter and the second combiner, and the other output end of the second distributor and the second combiner via the (-π / 2) phase shifter, The first combiner and the second combiner are respectively connected to the preceding stage of the first filter of the conventional on-board reception type telemeter receiver having two channels.

Further, according to the present invention, a plurality of filters are connected to a plurality of antennas, a plurality of amplifiers are connected to the plurality of filters, a plurality of mixers are connected to the plurality of amplifiers, and a local oscillator is connected to input terminals of the plurality of mixers. , The output terminals of the mixers are connected to the distributors, the output terminals of the distributors are connected to the switching elements, and the output terminals of the distributors are connected to the output terminals of the signals. Of the conventional on-board reception type telemeter reception, connecting a judgment circuit that works to compare the magnitudes of the two, connecting a driver circuit that works to drive the switching element to the judgment circuit, and connecting an amplifier to the switching element. It was configured by connecting to the front stage of the main carrier demodulator of the device.

According to the present invention, the first distributor and the second distributor are connected to the two antennas, one output end of the first distributor is connected to the first combiner, and the second distributor is connected. One output end of the distributor is connected to the first combiner via a (+ π / 2) phase shifter, the other output end of the first distributor is connected to the second combiner, and The other output end of the second distributor and the second combiner are connected via a (-π / 2) phase shifter, the third distributor is connected to the first combiner, and the second combiner is connected. Of the first filter of the conventional on-board reception type telemeter receiving device in which a fourth distributor is connected to the receiver, and two channels are provided for each output terminal of the third distributor and the fourth distributor. Each of them is connected to the preceding stage, a filter is connected to each of the other output terminals of the third distributor and the fourth distributor, an amplifier is connected to the filter, and an amplifier is connected to the amplifier. Each of the seventh distributor and the eighth distributor is connected, one output end of the seventh distributor is connected to the third combiner, and one output end of the eighth distributor is connected to the first distributor. 3 combiner is connected, the other output end of the 7th distributor is connected to the 4th combiner via a phase shifter of (+ π / 2), and the other output end of the 8th distributor is connected. The fourth combiner was connected via a (−π / 2) phase shifter, and two antennas added for transmission were connected to the third combiner and the fourth combiner.

Further, according to the present invention, a combiner is connected to the antenna, an antenna extended for reception is connected to the input end of the combiner, a distributor is connected to the output end of the combiner, and one output of the distributor is connected. The first end of the conventional on-board reception type telemeter receiver
The filter is connected to the preceding stage, the fourth filter is connected to the other output end of the distributor, the amplifier is connected to the fourth filter, and the antenna added for transmission is connected to the amplifier.

[0022]

The on-board reception type telemeter receiving device configured as described above receives the two telemeter signals of the right-hand circular polarization and the left-hand circular polarization of the same frequency, which are input by the two antennas, The two signals distributed by the second distributor and output from the first distributor, and the two signals output from the second distributor (+ π /
2), the phase is shifted by the (-π / 2) phase shifter 2
The two signals are combined by the first and second combiners to separate and extract the signal components of the right-handed circularly polarized telemeter signal and the left-handed circularly polarized telemeter signal. -By processing with the demodulator, it is possible to receive and record the right-hand circularly polarized wave and the left-hand circular knitting wave telemeter signals of the same frequency, and it is possible to improve frequency utilization efficiency.

Further, a plurality of antennas are installed at locations where they complement each other for blocking due to the body and wings of the aircraft, and the telemeter signals input from the plurality of antennas are subjected to processing such as filtering, amplification, and down conversion. After that, by selecting the one with the highest reception level from the multiple received signals by the judgment circuit, driver circuit, and switching element, it is possible to obtain good reception sensitivity at all times, so formation during flight The degree of freedom of can be increased.

The two telemeter signals of the right-handed circular polarization and the left-handed circularly polarized wave of the same frequency input by the two antennas are distributed by the first and second distributors, and output from the first distributor. Two signals and the output from the second distributor (+ π /
2), the phase is shifted by the (-π / 2) phase shifter 2
The two signals are combined by the first and second combiners to separate and extract the signal components of the right-handed circularly polarized telemeter signal and the left-handed circularly polarized telemeter signal. -The demodulator performs processing to record data, and the seventh distributor and the eighth distributor distribute the signal components of the right-handed circularly polarized wave and the left-handed circular knitting wave telemeter signal, respectively. The synthesizer synthesizes the signal components of the right-handed circularly polarized and left-handed circularly polarized telemeter signals, and the signal components of the right-handed circularly polarized and left-handed circularly polarized telemeter signals are (+ π /
2), the phase is shifted by the (-π / 2) phase shifter 2
After the two signals are combined by the fourth combiner and radiated into the space from the two antennas added for transmission, the signals radiated from the two antennas are combined in the space. Right-handed circularly polarized and left-handed circularly polarized telemeter signals are generated, and right-handed circularly polarized waves and left-handed circular knitting wave telemeter signals of the same frequency can be received and recorded. It can receive circularly polarized and left-handed circularly polarized telemeter signals, and can perform demodulation, signal processing, reproduction, and analysis in real time, and can evaluate the validity of acquired data during flight and use frequency. The efficiency can be increased.

Further, a plurality of antennas are installed at locations where they complement each other for blocking due to the aircraft body and wings, and the telemeter signals input from the plurality of antennas are combined by a combiner to create a receiver / demodulator. In addition to processing and recording the data, the signal output from the synthesizer is filtered and amplified, and then radiated into the space from the antenna added for transmission, so that good reception sensitivity can always be obtained, In addition to increasing the degree of freedom of formation at the time, it becomes possible to receive telemeter signals at ground facilities and perform demodulation, signal processing, reproduction and analysis in real time, and evaluate the effectiveness of acquired data during flight. You can

【Example】

Example 1. FIG. 1 is a block diagram showing an embodiment of the present invention. 1a and 1b are first and second telemeter transmitters, 2a and 2b are first and second telemeter signals, 3a and 3b are first, Second antennas, 4a to 4d are first to fourth distributors, 5a and 5b are first and second combiners, 6a to 6f are first to sixth filters, 7a and 7b are first, A second amplifier, 8 is a local oscillator, 9a and 9b are first and second mixers, 10a and 10b are first and second main carrier demodulators, and 11a and 11b are first and second subcarrier demodulators. Container, 12 is a recording device such as a tape recorder, 13a, 1
Reference numeral 3b is the first and second phase shifters.

In the telemeter receiver thus configured, the first and second telemeter transmitters 1a, 1
The first and second telemeter signals 2a and 2b of the same frequency of the right-handed circularly polarized wave and the left-handed circularly polarized wave respectively transmitted from b are
Received from the first and second antennas 3a and 3b,
It is output to the second distributors 4a and 4b. First distributor 4
a distributes the input signal and outputs it to the first combiner 5a and the second combiner 5b. The second distributor 4b receives the input signal as the first
Output to the first combiner 5a via the phase shifter 13a, and to the second combiner 5b via the second phase shifter 13b. The first and second combiners 5a and 5b combine the input signals, respectively, and the first combiner 5a produces a left-handed circularly polarized signal component, and the second combiner 5b produces a right-handed circularly polarized signal. The components are extracted and output to the first and second filters 6a and 6b.

First filter 6a and second filter 6b
Removes noise contained in the left-hand circularly polarized signal component output from the first combiner 5a and the right-hand circularly polarized signal component output from the second combiner 5b. Amplifier 7a,
Output to the second amplifier 7b. First amplifier 7a and second
Amplifier 7b amplifies the input signal and outputs it to the first mixer 9a and the second mixer 9b. The first mixer 9a and the second mixer 9b receive the local signal from the local oscillator 8 and down-convert the input signals from the first amplifier 7a and the second amplifier 7b to generate the first main carrier demodulator 10a. , To the second main carrier demodulator 10b. The first main carrier demodulator 10a and the second main carrier demodulator 10b demodulate the main carrier with respect to the input signal, and the third and fourth distributors 4 are provided.
Output to c and 4d. The third distributor 4c distributes the input signal and outputs it to the third filter 6c and the fourth filter 6d. The fourth distributor 4d distributes the input signal and outputs it to the fifth filter 6e and the sixth filter 6f. Third to sixth
The filters 6c to 6f separate and extract the frequency-multiplexed input signal by passing only the signal within the band of the filter with respect to the input signal. The first subcarrier demodulator 11a and the second subcarrier demodulator 11b perform subcarrier demodulation on the input signals from the fourth filter 6d and the sixth filter 6f, respectively. The recording device 12 records the input signals from the third filter 6c, the fifth filter 6e, the first subcarrier demodulator 11a, and the second subcarrier demodulator 11b in each channel.

As described above, the right-handed circularly polarized wave and the left-handed circularly polarized telemeter signal 2a and the telemeter signal 2b having the same frequency can be simultaneously received and recorded.

Example 2. FIG. 2 shows a second embodiment according to the present invention. 1 is a telemeter transmitter,
2 is a telemeter signal, 3a and 3b are first and second antennas, 4a to 4c are first to third distributors, 6a to 6d are first to fourth filters, and 7a to 7c are first to first. 3 an amplifier, 8 a local oscillator, 9a and 9b first and second mixers, 10 a main carrier demodulator, 11 a subcarrier demodulator, 1
2 is a recording device such as a tape recorder, 14 is a judgment circuit, 1
Reference numeral 5 is a switching element, and 16 is a driver circuit.

In the telemeter receiver thus configured, the telemeter signal 2 transmitted from the telemeter transmitter 1 is received by the first antenna 3a and the second antenna 3b, and the first filter 6a, It is output to each of the second filters 6b. Here, in the first and second antennas 3a and 3b, as shown in FIG. 10, one antenna is in front of the telemeter receiver and the other antenna is
Install in a position that complements blocking by the aircraft body or wings.

The first filter 6a and the second filter 6b
Removes noise included in the signals output from the first antenna 3a and the second antenna 3b, and the first amplifier 7a,
Output to the second amplifier 7b. First amplifier 7a, second
Amplifier 7b amplifies the input signal and outputs it to the first mixer 9a and the second mixer 9b. The first mixer 9a and the second mixer 9b receive the local signal from the local oscillator 8 and down-convert the input signals from the first amplifier 7a and the second amplifier 7b to obtain the first distributor 4a, Output to the second distributor 4b. First distributor 4a, second distributor 4
b distributes the input signal and outputs it to the determination circuit 14 and the switching element 15.

The determination circuit 14 includes a first distributor 4a and a second distributor 4a.
The power levels of the input signals from the distributor 4b are compared. The driver circuit 16 drives the switching element 15 so as to pass a signal having a large power among the signals compared by the determination circuit 14. The switching element 15 is driven by the driver circuit 16, and the signal having the larger power of the first distributor 4a and the second distributor 4b is supplied to the third amplifier 7a.
output to c. The third amplifier 7c amplifies the input signal and outputs it to the main carrier demodulator 10. The main carrier demodulator 10 performs demodulation of the main carrier on the input signal, and the third distributor 4c
Output to. The third distributor 4c distributes the input signal
To the second filter 6c and the fourth filter 6d. Third
The filter 6c and the fourth filter 6d separate and extract the frequency-multiplexed input signal by passing only the signal within the band of the filter from the input signal. The subcarrier demodulator 11 demodulates the subcarrier for the input signal from the fourth filter 6d. The recording device 12 such as a tape recorder records the input signal from the third filter 6c and the subcarrier demodulator 11 in each channel.

By the series of operations described above, it is possible to always obtain good reception sensitivity, so that it is possible to increase the degree of freedom of formation during flight.

Example 3. FIG. 3 shows a third embodiment according to the present invention. 1a and 1b are first and second telemeter transmitters, 2a and 2b are first and second telemeter signals, and 3a to 3d are first to fourth antennas, and 4a to 4a.
4h denotes first to eighth distributors, 5a to 5d denote first to fourth combiners, 6a to 6h denote first to eighth filters, and 7a to 7
d is a 1st-4th amplifier, 8 is a local oscillator, 9a, 9b
Are first and second mixers, 10a and 10b are first and second main carrier demodulators, 11a and 11b are first and second subcarrier demodulators, 12 is a recording device such as a tape recorder, and 13a.
13d are the 1st-4th phaser.

In the telemeter receiver thus constructed, the first and second telemeter transmitters 1a, 1a are provided.
The first and second telemeter signals 2a and 2b of the same frequency of the right-handed circularly polarized wave and the left-handed circularly polarized wave respectively transmitted from b are
Received from the first and second antennas 3a and 3b,
It is output to the second distributors 4a and 4b. First distributor 4
a distributes the input signal and outputs it to the first combiner 5a and the second combiner 5b. The second distributor 4b receives the input signal as the first
Output to the first combiner 5a via the phase shifter 13a, and to the second combiner 5b via the second phase shifter 13b. The first and second combiners 5a and 5b combine the input signals, respectively, and the first combiner 5a produces a left-handed circularly polarized signal component, and the second combiner 5b produces a right-handed circularly polarized signal. The components are extracted and output to the third and fourth distributors 4c and 4d, respectively. The third and fourth distributors 4c and 4d distribute the input signal and output it to the first and second filters 6a and 6b and the seventh and eighth filters 6g and 6h.

First filter 6a and second filter 6b
Removes noise contained in the left-handed circularly polarized signal component output from the third distributor 4c and the right-handed circularly polarized signal component output from the fourth distributor 4d. Amplifier 7a,
Output to the second amplifier 7b. First amplifier 7a and second
Amplifier 7b amplifies the input signal and outputs it to the first mixer 9a and the second mixer 9b. The first mixer 9a and the second mixer 9b receive the local signal from the local oscillator 8 and down-convert the input signals from the first amplifier 7a and the second amplifier 7b to generate the first main carrier demodulator 10a. , To the second main carrier demodulator 10b. The first main carrier demodulator 10a and the second main carrier demodulator 10b demodulate the main carrier with respect to the input signal, and the fifth and sixth distributors 4 are provided.
It outputs to e and 4f. The fifth distributor 4e distributes the input signal and outputs it to the third filter 6c and the fourth filter 6d. The sixth distributor 4f distributes the input signal and outputs it to the fifth filter 6e and the sixth filter 6f. Third to sixth
The filters 6c to 6f separate and extract the frequency-multiplexed input signal by passing only the signal within the band of the filter with respect to the input signal. The first subcarrier demodulator 11a and the second subcarrier demodulator 11b perform subcarrier demodulation on the input signals from the fourth filter 6d and the sixth filter 6f, respectively. The recording device 12 records the input signals from the third filter 6c, the fifth filter 6e, the first subcarrier demodulator 11a, and the second subcarrier demodulator 11b in each channel.

The seventh and eighth filters 6g and 6h remove noise contained in the signals output from the third and fourth distributors 4c and 4d, and are supplied to the third and fourth amplifiers 7c and 7d. Output each. The third and fourth amplifiers 7c and 7d amplify the input signal and output it to the seventh and eighth distributors 4g and 4h. The seventh distributor 4g distributes the input signal and outputs it to the third combiner 5c and the third phase shifter 13c. Also, the eighth
The distributor 4h of distributes the input signal to the third combiner 5c.
And output to the fourth phase shifter 13d. The third and fourth phase shifters 13c and 13d respectively change the phase of the input signal by (+ π /
2), (-π / 2) shift and output to the fourth combiner 5d. The third and fourth combiners 5c and 5d combine the input signals and output the combined signals to the third and fourth antennas 3c and 3d. The third and fourth antennas 3c and 3d radiate an input signal into space. Here, the signal radiated from the fourth antenna 3d and the signal radiated from the third antenna 3c are phase-shifted by (+ π / 2) and phase (-
π / 2) is a combined signal of the shifted signals, so the third,
The signals radiated from the fourth antennas 3c and 3d are combined in space, and right-handed circular polarization and left-handed circular polarization of the same frequency are simultaneously generated.

As described above, the right and left circularly polarized first and second telemeter signals of the same frequency are simultaneously received.
By recording the telemeter signal of the right-handed circular polarization and the left-handed circular polarization transmitted from the on-board reception type telemeter receiving device according to the present invention in the ground facility etc.,
Demodulation, signal processing, reproduction and analysis can be performed in real time, and the effectiveness of acquired data can be evaluated during flight.

Example 4. FIG. 4 shows a fourth embodiment according to the present invention. 1 is a telemeter transmitter,
2 is a telemeter signal, 3a to 3c are first to third antennas, 4a and 4b are first and second distributors, 5 is a combiner, and 6
a to 6d are first to fourth filters, 7a and 7b are first,
A second amplifier, 8 is a local oscillator, 9 is a mixer, 10 is a main carrier demodulator, 11 is a subcarrier demodulator, and 12 is a recording device such as a tape recorder.

In the telemeter receiver thus configured, the telemeter signal 2 transmitted from the telemeter transmitter 1 is received by the first antenna 3a and the second antenna 3b and output to the combiner 5. It Synthesizer 5
Outputs the combined input signal to the first distributor 4a.
Here, as shown in FIG. 10, the first and second antennas 3a and 3b are arranged such that one antenna is in front of the telemeter receiver and the other antenna complements blocking by the body or wing of the aircraft. Install in position.

The first distributor 4a distributes the input signal,
It outputs to the 1st filter 6a and the 4th filter 6d.
The first filter 6a removes noise included in the input signal and outputs it to the first amplifier 7a. The first amplifier 7 a amplifies the input signal and outputs it to the mixer 9. The mixer 9 receives the local signal from the local oscillator 8, down-converts the input signal from the first amplifier 7 a, and outputs the down-converted signal to the main carrier demodulator 10. The main carrier demodulator 10 demodulates the main carrier with respect to the input signal and outputs the demodulated main carrier to the second distributor 4b. The second distributor 4b distributes the input signal and outputs it to the second and third filters 6b and 6c. The second and third filters 6b and 6c separate and extract the frequency-multiplexed input signal by passing only the signal within the band of the filter with respect to the input signal. The subcarrier demodulator 11 demodulates the subcarrier for the input signal from the third filter 6c. The recording device 12 such as a tape recorder records the input signals from the second filter 6b and the subcarrier demodulator 11 in each channel.

The fourth filter 6d removes noise contained in the input signal and outputs it to the second amplifier 7b. The second amplifier 7b amplifies the input signal and outputs it to the third antenna 3c. The third antenna 3c radiates an input signal into space.

As described above, since it is possible to always obtain good reception sensitivity, it is possible to increase the degree of freedom of formation during flight, and at the same time, in the ground facility or the like, on-board reception type telemeter reception according to the present invention. By receiving the telemeter signal transmitted from the device, demodulation /
Signal processing / reproduction and analysis can be performed in real time, and the validity of acquired data can be evaluated during flight.

[0045]

Since the present invention is constructed as described above, it has the following effects.

A first distributor and a second distributor are connected to the two antennas, one output end of the first distributor is connected to the first combiner, and a second distributor is connected. One output end and the first
Of the first combiner is connected via the (+ π / 2) phase shifter,
The other output end of the distributor and the second combiner, and the other output end of the second distributor and the second combiner (-π /
By connecting via the phase shifter of 2), it is possible to receive and record two types of telemeter signals whose polarization planes are right-handed circular polarization and left-handed circular polarization, respectively, and improve frequency utilization efficiency. be able to.

In addition, a plurality of antennas are installed at locations where the blocking of aircraft bodies and wings are complemented, a plurality of filters are connected to the plurality of antennas, and a plurality of amplifiers are connected to the plurality of filters. , Connect multiple mixers to multiple amplifiers, connect local oscillators to the input terminals of multiple mixers, connect multiple distributors to the output terminals of multiple mixers, and connect one output terminal of the multiple distributors to A switching element is connected, and a decision circuit that acts to compare the magnitude of signal power is connected to the other output terminal of the plurality of distributors.
By connecting the driver circuit that works to drive the switching element to the judgment circuit and connecting the amplifier to the switching element, you can select the signal with the highest reception sensitivity from the received signals from multiple antennas, and always receive good reception. Since it is possible to obtain sensitivity, it is possible to increase the degree of freedom of formation during flight.

Further, the first distributor and the second distributor are connected to the two antennas, one output end of the first distributor is connected to the first combiner, and the second distributor is connected. One output end of the divider and the first combiner via a (+ π / 2) phase shifter, the other output end of the first divider and the second combiner, and the second combiner. The other output end of the distributor and the second combiner are connected via a (-π / 2) phase shifter, and the third and fourth distributors are respectively connected to the first combiner and the second combiner. Connect the vessel,
A filter is connected to one output end of each of the third and fourth distributors, an amplifier is connected to each of the filters, a seventh and an eighth distributor are connected to each of the amplifiers, and one of the seventh distributors is connected. The output end is connected to the third combiner, the other output end of the seventh distributor is connected to the fourth combiner via a (+ π / 2) phaser, and the eighth distributor is connected. One output end is connected to the third combiner, and the other output end of the eighth distributor is connected to the fourth combiner via the (-π / 2) phase shifter. , By connecting the additional antennas for transmission to the fourth combiner, it is possible to receive and record two types of telemeter signals with the same frequencies of the right-hand circular polarization and the left-hand circular polarization, respectively. Use efficiency can be improved, and if the ground equipment receives telemeter signals, demodulation, signal processing and reproduction And, it becomes possible to perform the analysis in real time, and it is possible to evaluate the validity of the acquired data during the flight.

In addition, a plurality of antennas are installed at locations where the block kings of the aircraft body and wings are complemented each other, a combiner is connected to the plurality of antennas, a distributor is connected to the combiner, and distribution is performed. By connecting a filter to the receiver, connecting an amplifier to the filter, and connecting an additional antenna for transmission to the amplifier, it is possible to obtain good reception sensitivity even in the angle range where good reception sensitivity could not be obtained in the past. It is possible to increase the degree of freedom of formation during flight, and if the ground equipment receives telemeter signals, demodulation, signal processing, reproduction and analysis can be performed in real time. The effectiveness of can be evaluated.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is a block diagram showing a third embodiment of the present invention.

FIG. 4 is a block diagram showing a fourth embodiment of the present invention.

FIG. 5 is a block diagram showing a conventional telemeter receiver.

FIG. 6 is a diagram showing an example of a telemeter signal.

FIG. 7 is an explanatory diagram of processing of a main carrier demodulator.

FIG. 8 is an explanatory diagram of processing by a distributor and a filter.

FIG. 9 is an explanatory diagram of processing of a subcarrier demodulator.

FIG. 10 is a diagram showing an example of an antenna extension position.

[Explanation of symbols]

1 telemeter transmitter, 2 telemeter signals, 3 antennas, 4 distributors, 5 combiners, 6 filters, 7
Amplifier, 8 local oscillator, 9 mixer, 10 main carrier demodulator, 11 subcarrier demodulator, 12 recording device, 13
Phaser, 14 determination circuit, 15 switching element, 16
Driver circuit.

Claims (4)

[Claims] 1. In a telemeter receiver mounted on an aircraft, first and second telemeters having the same frequency of right-handed circular polarization and left-handed circular polarization transmitted from the first and second telemeter transmitting devices, respectively. First and second antennas for receiving signals and first and second distributors for distributing signals output from the first and second antennas, respectively (+ π /
2) and (−π / 2) phase characteristics, and the phase of the signal output from the second distributor is (+ π / 2),
By combining the signals output from the first and second phase shifters for (-π / 2) shift, the first distributor and the first phase shifter, only the left-handed circularly polarized signal component is obtained. A second combiner for extracting only the right-hand circularly polarized signal component by combining the signals output from the first divider and the second phase shifter And first and second filters for removing noise included in the signals output from the first and second combiners, and a first amplifier for amplifying signals output from the first and second filters. First and second amplifiers, a local oscillator that outputs a local signal, a signal output from the first and second amplifiers, and a local signal output from the local oscillator are input, and the first and second amplifiers are input.
First and second mixers that down-convert the signal output from the amplifier, and first and second main carrier demodulators that demodulate the main carrier of the signals output from the first and second mixers. And third and fourth distributors for distributing the signals output from the first and second main carrier demodulators, and band limiting the signals output from the third and fourth distributors, Third and fifth filters that pass only the first main carrier demodulated signal and the third main carrier demodulated signal that are respectively included in the signals output from the third and fourth distributors,
The signals output from the third and fourth distributors are band-limited, and the signals after the second main carrier demodulation and the fourth signal which are included in the signals output from the third and fourth distributors, respectively, are included. Fourth and sixth filters that pass only the signal after the main carrier demodulation, first and second subcarrier demodulators that demodulate the subcarriers of the signals output from the fourth and sixth filters, A telemeter receiver comprising the third and fifth filters and a recording device such as a tape recorder for recording the signals output from the first and second subcarrier demodulators. 2. A telemeter receiving device mounted on an aircraft, which receives a telemeter signal transmitted from a telemeter transmitting device and is provided at first and second antennas which are respectively installed at locations where they complement each other. First and second filters for removing noise included in signals output from the first and second antennas, and first and second amplifiers for amplifying signals output from the first and second filters. And a local oscillator for outputting a local signal, the first,
First and second mixers for inputting the signal output from the second amplifier and the local signal output from the local oscillator and down-converting the signals output from the first and second amplifiers. , First and second distributors for distributing signals output from the first and second mixers, and one output terminal of the first and second distributors. The decision circuit for comparing the magnitudes of the powers of the signals output from the second distributor and outputting the decision signal is connected to the other output terminals of the first and second distributors, and
The signal output from the second distributor is input to the first,
A switching element that switches and outputs the signal output from the second distributor, and is connected between the determination circuit and the switching element, and the switching element is configured to operate according to the determination signal output from the determination circuit. A driver circuit for driving the switching element so as to output a signal having a high power level among the signals output from the second distributor, and a third amplifier for amplifying the signal output from the switching element. A main carrier demodulator that demodulates the main carrier of the signal output from the third amplifier, a third distributor that distributes the signal output from the main carrier demodulator, and the third distributor A third filter for band-limiting the signal output from the first divider and passing only the signal after the first main carrier demodulation included in the signal output from the third distributor. A fourth filter for band-limiting the signal output from the third distributor, and passing only the signal after the second main carrier demodulation included in the signal output from the third distributor; A subcarrier demodulator for demodulating the subcarrier of the signal output from the fourth filter, and a recording device such as a tape recorder for recording the signal output from the third filter and the subcarrier demodulator. A telemeter receiver characterized by the above. 3. A telemeter receiving device mounted on an aircraft, wherein first and second telemeters of the same frequency of right-handed circular polarization and left-handed circular polarization transmitted from the first and second telemeter transmitting devices, respectively. First and second antennas for receiving signals and first and second distributors for distributing signals output from the first and second antennas, respectively (+ π /
2) and (−π / 2) phase characteristics, and the phase of the signal output from the second distributor is (+ π / 2),
By combining the signals output from the first and second phase shifters for (-π / 2) shift, the first distributor and the first phase shifter, only the left-handed circularly polarized signal component is obtained. A second combiner for extracting only the right-hand circularly polarized signal component by combining the signals output from the first divider and the second phase shifter And a third for distributing the signals output from the first and second combiners,
A fourth distributor, first and second filters for removing noise contained in signals output from the third and fourth distributors, and signals output from the first and second filters The first and second amplifiers for amplifying the signal, the local oscillator for outputting a local signal, the signals output from the first and second amplifiers and the local signal output from the local oscillator, and The signals output from the first and second amplifiers are
Down-converting first and second mixers, first and second main carrier demodulators for demodulating main carriers of signals output from the first and second mixers, and the first and second mixers Fifth and sixth distributors for distributing the signals output from the main carrier demodulator, and band limiting for the signals output from the fifth and sixth distributors, and the fifth and sixth distributors Third and fifth filters that pass only the signal after the first main carrier demodulation and the signal after the third main carrier demodulation, which are respectively included in the signals output from the above, and the above fifth and sixth distributors. Band limiting the signal output from the above, and passing only the signal after the second main carrier demodulation and the signal after the fourth main carrier demodulation included in the signals output from the fifth and sixth distributors, respectively. 4th and 6th filters to be activated, and signals output from the 4th and 6th filters First demodulating subcarriers, the second
Sub-carrier demodulator, a recording device such as a tape recorder for recording the signals output from the third and fifth filters and the first and second sub-carrier demodulators, and the third and fourth Seventh and eighth filters for removing noise included in the signal output from the distributor, third and fourth amplifiers for amplifying the signals output from the seventh and eighth filters, and the above-mentioned The seventh and eighth distributors for distributing the signals output from the third and fourth amplifiers, and (+ π / 2) and (−π /
2) having the phase characteristic, the phases of the signals output from the seventh and eighth distributors are (+ π / 2) and (−π /
2) Third and fourth phase shifters for shifting, third synthesizer for synthesizing signals output from the seventh and eighth distributors, and output from the third and fourth phase shifters. A fourth synthesizer for synthesizing the signals, and a third radiating the signal to the space, which receives the signals output from the third and fourth synthesizers.
A telemeter receiver comprising a fourth antenna. 4. A telemeter receiving device mounted on an aircraft, which receives a telemeter signal transmitted from a telemeter transmitting device and is installed at respective places complementing each other for blocking, and the above-mentioned first and second antennas. A combiner for combining the signals output from the first and second antennas;
A first filter that removes noise included in the signal output from the combiner; a first amplifier that amplifies the signal output from the first filter; a local oscillator that outputs a local signal; A mixer that inputs a signal output from the first amplifier and a local signal output from the local oscillator and down-converts the signal output from the first amplifier, and a main carrier of the signal output from the mixer. A main carrier demodulator for demodulating a signal, a second distributor for distributing a signal output from the main carrier demodulator, and a second distributor for band limiting the signal output from the second distributor. A second filter that passes only the signal after the first main carrier demodulation included in the signal output from the converter,
A third filter for band-limiting the signal output from the second distributor, and allowing only the signal after the second main carrier demodulation included in the signal output from the second distributor to pass; A subcarrier demodulator for demodulating the subcarrier of the signal output from the third filter; a recording device such as a tape recorder for recording the signal output from the second filter and the subcarrier demodulator; A fourth filter for removing noise included in the signal output from the first distributor;
A second amplifier for amplifying the signal output from the fourth filter
The on-board reception type telemeter receiving device, comprising: the amplifier and the signal output from the second amplifier, and a third antenna that radiates the signal into space.