CN218006233U

CN218006233U - Eight-channel amplitude-phase consistent superheterodyne receiver

Info

Publication number: CN218006233U
Application number: CN202221264237.7U
Authority: CN
Inventors: 祁本峰; 张旺
Original assignee: Nanjing Zhenguan Electronic Technology Co ltd
Current assignee: Nanjing Zhenguan Electronic Technology Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-12-09
Anticipated expiration: 2032-05-25

Abstract

The utility model discloses an eight passageway amplitude phase unanimity superheterodyne receivers, including this vibration source unit, eight ways receiving channel. The local oscillation source unit generates a path of 12GHz local oscillation signal, a path of 31-39 GHz frequency hopping local oscillation signal and a path of 28.8GHz and 21.84GHz point frequency local oscillation signal switched by switches by using a crystal oscillator 100MHz reference signal. And the three local oscillation signals are input into the frequency mixers in the eight receiving channels through power division. The receiving channel comprises a receiving unit, a frequency conversion processing unit, a harmonic processing unit, a first frequency mixing unit, a first intermediate frequency unit, a second frequency mixing unit and a second intermediate frequency unit which are sequentially connected in series. The frequency conversion processing unit comprises a low-frequency band frequency conversion unit, a middle-frequency band frequency conversion unit and a high-frequency band frequency conversion unit which are connected in parallel. The low-frequency band frequency conversion unit, the middle-frequency band frequency conversion unit and the high-frequency band frequency conversion unit are connected with the harmonic processing unit through switches. The utility model discloses system redundancy has been reduced to move looks ware and numerical control attenuator through adding and be convenient for ally oneself with the amplitude and phase uniformity of transferring the channel signal.

Description

Eight-channel amplitude-phase consistent superheterodyne receiver

Technical Field

The utility model relates to a wireless signal receiving arrangement.

Background

The superheterodyne receiver mixes an input signal received by an antenna with an oscillation wave generated locally, converts the input signal into a signal of a certain frequency, and performs digital processing on the signal.

In order to avoid generating false signals, currently, in a broadband superheterodyne receiver with a frequency range of 0.38 to 18GHz, signal segmentation processing needs to be performed through a switch filter, a broadband signal is divided into three frequency bands of 0.38 to 2GHz, 2 to 6GHz, and 6 to 18GHz, and the signals of the three frequency bands are respectively subjected to frequency mixing processing with respective local oscillation signals to obtain intermediate frequency signals with required fixed frequency. In this way, for a broadband superheterodyne receiver with eight channels in a frequency range of 0.38 to 18GHz, many functional units are required, which not only has high cost, but also the spatial layout of the units is complex, which has high requirement level for designers in the spatial layout of the units, and the micro-assembly operation is troublesome, which directly affects the later system debugging work.

Disclosure of Invention

The utility model discloses the problem that will solve:

1. the cost is reduced by reducing the system redundancy;

2. and the phase and amplitude of the signals output by each channel are consistent.

In order to solve the above problem, the utility model discloses a scheme as follows:

an eight-channel amplitude-phase consistent superheterodyne receiver comprises a local oscillation source unit and eight receiving channels; the local oscillation source unit generates a 100MHz reference signal through the crystal oscillator module, divides the signal through the first power divider, and generates a path of 12GHz local oscillation signal, a path of 31-39 GHz frequency hopping local oscillation signal, and a path of 28.8GHz and 21.84GHz point frequency local oscillation signal switched by the switches after being processed by the comb spectrum, the frequency hopping source, the point frequency source and the frequency multiplier; the receiving channel comprises a receiving unit, a frequency conversion processing unit, a harmonic processing unit, a first frequency mixing unit, a first intermediate frequency unit, a second frequency mixing unit and a second intermediate frequency unit which are sequentially connected in series; the receiving unit is connected with the input; the frequency conversion processing unit comprises a low-frequency-band frequency conversion unit, a middle-frequency-band frequency conversion unit and a high-frequency-band frequency conversion unit; the low-frequency band frequency conversion unit, the middle-frequency band frequency conversion unit and the high-frequency band frequency conversion unit are connected in parallel through switches, the input end of the low-frequency band frequency conversion unit is connected with the output of the receiving unit through a first switch, and the output end of the high-frequency band frequency conversion unit is connected with the input of the harmonic processing unit through a second switch; the low-frequency band frequency conversion unit is used for filtering an input signal into a 0.38-2 GHz signal through the band-pass filter, and then mixing the input signal with a 12GHz local oscillation signal output by the local oscillation source unit through the frequency mixer to move the 0.38-2 GHz signal to 12.38-14 GHz; the middle frequency band frequency conversion unit is used for filtering an input signal into a 2-6 GHz signal through a band-pass filter, mixing the 2-6 GHz signal with a 12GHz local oscillation signal output by the local oscillation source unit through a mixer, and moving the 2-6 GHz signal to 14-18 GHz; the high-frequency band frequency conversion unit is used for filtering an input signal into a 6-18 GHz signal through a band-pass filter; the harmonic processing unit is used for filtering the input signals into 6-10 GHz signals and 10-18 GHz signals respectively through two band-pass filters which are connected in parallel through a switch and then outputting the signals through the switch; the first frequency mixing unit carries out frequency mixing through a frequency mixer and a 31-39 GHz frequency hopping local oscillation signal which is input by the phase shifter and output by the local oscillation source unit to generate 27 +/-0.5 GHz and 20.04 +/-0.5 GHz signals; the first intermediate frequency unit is used for filtering 27 +/-0.5 GHz signals and 20.04 +/-0.5 GHz signals generated by the first frequency mixing unit through two band-pass filters connected in parallel through a switch respectively, and then outputting the 27 +/-0.5 GHz signals and the 20.04 +/-0.5 GHz signals through the switch; the second frequency mixing unit is used for carrying out frequency mixing on the spot frequency local oscillation signals of 28.8GHz and 21.84GHz output by the local oscillation source unit and input through the phase shifter by a frequency mixer to generate 1.8 +/-0.5 GHz signals; the second intermediate frequency unit is used for processing and outputting the 1.8 +/-0.5 GHz signal generated by the second mixing unit through a filter, an amplifier and a numerical control attenuator.

Further, the local vibration source unit comprises a crystal oscillator module, a first power divider, a first local vibration source unit, a second local vibration source unit and a third local vibration source unit; the output of the crystal oscillator module is connected with the first local oscillation source unit, the second local oscillation source unit and the third local oscillation source unit through the first power divider and used for generating a 100MHz reference signal; the first local vibration source unit comprises a comb spectrum, a first filter and a second power divider which are sequentially connected in series; the first filter is a 12GHz band-pass filter; comb spectrum generates comb spectrum signals of fundamental frequency for a plurality of times by using 100MHz reference signals, 12GHz signals are filtered by a first filter, and the comb spectrum signals are subjected to power division by a second power divider and then serve as 12GHz local oscillation signals of each receiving channel; the second local vibration source unit comprises a frequency hopping source, a first frequency mixer, a second filter, a first frequency multiplier and a third power divider which are sequentially connected in series; the frequency hopping source is a 3.5-7.5 GHz frequency hopping source, and a 100MHz reference signal is used as an input to generate a 3.5-7.5 GHz signal output; the first mixer is connected with the first local vibration source unit, and outputs 15.5-19.5 GHz signals after mixing the 12GHz signals output by the first local vibration source unit as the mixing source and the 3.5-7.5 GHz signals output by the frequency hopping source; the second filter is a 15.5-19.5 GHz band-pass filter; the 15.5-19.5 GHz signals filtered and output by the second filter are subjected to frequency multiplication by the first frequency multiplier and then output 31-39 GHz signals; the 31-39 GHz signal output by the first frequency multiplier is subjected to power division by the third power divider and then is used as a 31-39 GHz frequency hopping local oscillator signal of each receiving channel; the third local vibration source unit comprises a first frequency local vibration source unit, a second frequency local vibration source unit and a switch combined path power divider; the input of the first frequency local vibration source unit and the input of the second frequency local vibration source unit are connected with the output of the first power divider; the output of the first frequency local vibration source unit and the output of the second frequency local vibration source unit are connected with the input of the switch combining power divider; the first frequency local oscillation source unit comprises a first frequency point frequency source, a third filter and a second frequency multiplier which are sequentially connected in series; the first frequency point frequency source is a 14.4GHz point frequency source, and a 100MHz reference signal is used as an input to generate a 14.4GHz signal output; the third filter is a 14.4GHz band-pass filter; the 14.4GHz signal filtered and output by the third filter passes through the second frequency multiplier and then outputs a 28.8GHz signal, and the signal is input to the switch combiner power divider; the second frequency local oscillation source unit comprises a second frequency point frequency source, a fourth filter and a third frequency multiplier which are sequentially connected in series; the second frequency point frequency source is a 10.92GHz point frequency source, and a 100MHz reference signal is used as an input to generate a 10.92GHz signal output; the fourth filter is a 10.92GHz band-pass filter; the 10.92GHz signal filtered and output by the fourth filter passes through the third frequency multiplier and then outputs a 21.84GHz signal, and the GHz signal is input into the switch combiner power divider.

Further, the low-frequency band frequency conversion unit comprises a first band-pass filter, a second low-noise amplifier, a first switch filter, a second mixer, a second band-pass filter and a first amplifier which are sequentially connected in series; wherein, the first band-pass filter is a 0.38-2 GHz band-pass filter; the first switch filter is a 0.38-2 GHz switch filter group; the second frequency mixer is connected with the local oscillation source unit for outputting a 12GHz local oscillation signal; the second mixer takes the 12GHz signal output by the local vibration source unit as a mixing source, mixes the 12GHz signal with the 0.38-2 GHz signal filtered and output by the first switch filter, and outputs the 12.38-14 GHz signal; the second band-pass filter is a 12.38-14 GHz band-pass filter.

Further, the intermediate frequency band frequency conversion unit comprises a third band-pass filter, a third low-noise amplifier, a second switch filter, a third mixer, a fourth band-pass filter and a second amplifier which are sequentially connected in series; wherein, the third band-pass filter is a 2-6 GHz band-pass filter; the second switch filter is a 2-6 GHz switch filter group; the third mixer is connected with the local oscillation source unit for outputting a 12GHz local oscillation signal; the third mixer takes the 12GHz signal output by the local oscillation source unit as a mixing source, mixes the 12GHz signal with the 2-6 GHz signal filtered and output by the second switch filter, and outputs a 14-18 GHz signal; the second band-pass filter is a band-pass filter of 14-18 GHz.

Further, the high-band frequency conversion unit comprises a fifth band-pass filter, a fourth low-noise amplifier and a third switch filter which are sequentially connected in series; wherein, the fifth band-pass filter is a 6-18 GHz band-pass filter; the third switch filter is a 6-18 GHz switch filter bank.

Further, the harmonic processing unit includes a third amplifier, a third switch, a sixth band-pass filter, a seventh band-pass filter, and a fourth switch; the input of the third amplifier is connected with the output of the variable frequency processing unit, and the output of the third amplifier is connected with the input of the third switch; the input of the sixth band-pass filter and the input of the seventh band-pass filter are connected with the output of the third switch, and the output of the sixth band-pass filter and the output of the seventh band-pass filter are connected with the input of the fourth switch; wherein, the sixth band-pass filter is a 6-10 GHz band-pass filter, and the seventh band-pass filter is a 10-18 GHz band-pass filter.

Further, the first frequency mixing unit includes a fourth mixer and a first phase shifter; the input of the fourth mixer is connected with the output of the harmonic processing unit, the mixing input is connected with the output of the first phase shifter, and the output is connected with the input of the first intermediate frequency unit; the input of the first phase shifter is connected with the frequency hopping local oscillator signal output of the local oscillator source unit 31-39 GHz, and the output of the first phase shifter is connected with the frequency mixing input of the fourth frequency mixer.

Further, the first intermediate frequency unit includes a fifth switch, an eighth band-pass filter, a ninth band-pass filter, and a sixth switch; the input of the fifth switch is connected with the output of the first frequency mixing unit, and the output of the fifth switch is connected with the inputs of the eighth band-pass filter and the ninth band-pass filter; the outputs of the eighth band-pass filter and the ninth band-pass filter are connected with the input of the sixth switch; the output of the sixth switch is connected with the second frequency mixing unit; the eighth band-pass filter is a 27 +/-0.5 GHz band-pass filter, and the ninth band-pass filter is a 20.04 +/-0.5 GHz band-pass filter.

Further, the second frequency mixing unit includes a fifth mixer and a second phase shifter; the input of the fifth mixer is connected with the output of the first intermediate frequency unit, the mixing input is connected with the output of the second phase shifter, and the output is connected with the input of the second intermediate frequency unit; the input of the second phase shifter is connected with the output of the local oscillation source unit 28.8GHz and 21.84GHz dot-frequency local oscillation signals, and the output of the second phase shifter is connected with the mixing input of the fifth mixer.

Furthermore, the receiving unit comprises an amplitude limiter, a first low noise amplifier and a first numerical control attenuator which are sequentially connected in series. The second intermediate frequency unit comprises a tenth band-pass filter, a fourth amplifier and a second numerical control attenuator which are sequentially connected in series; wherein, the tenth band-pass filter is a 1.8 plus or minus 0.5GHz band-pass filter.

The technical effects of the utility model are as follows:

1. converting the 0.38-18 GHz broadband signal into a 1.8 +/-0.5 GHz signal with fixed frequency to realize superheterodyne receiving;

2. each channel shares one local oscillation source unit, and local oscillation signals with different frequencies required by frequency mixing are synthesized by 100MHz reference signals, so that the number of local oscillation sources is reduced, and system redundancy is reduced;

3. the 0.38-2 GHz signals as the low frequency band and the 2-6 GHz signals as the medium frequency band are migrated to 6-18GHz for unified superheterodyne frequency mixing treatment, so that superheterodyne frequency mixing components of different frequency bands are reduced, and system redundancy is reduced;

4. the local oscillation signal is added with a phase shifter during superheterodyne frequency mixing, so that the consistency of the phases of eight receiving channels can be conveniently adjusted during joint tuning;

5. the eight receiving channels are provided with a front numerical control attenuator and a rear numerical control attenuator, so that the amplitude consistency of the eight receiving channels can be adjusted conveniently during joint debugging.

Drawings

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the present vibration source unit according to the embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a receiving unit according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a frequency conversion processing unit according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a harmonic processing unit and a first mixing unit according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of the first intermediate frequency unit, the second mixing unit and the second intermediate frequency unit according to an embodiment of the present invention.

In each of the above-described figures,

1 is a local oscillation source unit, 11 is a crystal oscillation module, 12 is a first power divider, 13 is a first local oscillation source unit, 131 is a comb spectrum, 132 is a first filter, and 133 is a second power divider; 14 is a second local oscillator unit, 141 is a frequency hopping source, 142 is a first mixer, 143 is a second filter, 144 is a first frequency multiplier, and 145 is a third power divider; 15 is a third local oscillation source unit, 151 is a first frequency local oscillation source unit, 1511 is a first frequency point frequency source, 1512 is a third filter, 1513 is a second frequency multiplier, 152 is a second frequency local oscillation source unit, 1521 is a second frequency point frequency source, 1522 is a fourth filter, 1523 is a third frequency multiplier, and 153 is a switch combiner power divider;

2 is a receiving channel, 21 is a receiving unit, 211 is a limiter, 212 is a first low noise amplifier, 213 is a first numerical control attenuator; 22, a frequency conversion processing unit, 221, a low-band frequency conversion unit, 2211, a first bandpass filter, 2212, a second low-noise amplifier, 2213, a first switching filter, 2214, a second mixer, 2215, a second bandpass filter, and 2216, a first amplifier; 222 is a middle band frequency conversion unit, 2221 is a third band pass filter, 2222 is a third low noise amplifier, 2223 is a second switching filter, 2224 is a third mixer, 2225 is a fourth band pass filter, 2226 is a second amplifier; 223 is a high band frequency conversion unit, 2231 is a fifth bandpass filter, 2232 is a fourth low noise amplifier, 2233 is a third switching filter; 228 is a first switch, 229 is a second switch; 23 is a harmonic processing unit, 231 is a third amplifier, 232 is a third switch, 233 is a sixth band-pass filter, 234 is a seventh band-pass filter, and 235 is a fourth switch; 24 is a first mixing unit, 241 is a fourth mixer, 242 is a first phase shifter; 25 is a first intermediate frequency unit, 251 is a fifth switch, 252 is an eighth band-pass filter, 253 is a ninth band-pass filter, 254 is a sixth switch; 26 is a second mixing unit, 261 is a fifth mixer, 262 is a second phase shifter, 27 is a second intermediate frequency unit, 271 is a tenth bandpass filter, 272 is a fourth amplifier, and 273 is a second digitally controlled attenuator.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, an eight-channel amplitude-coherent superheterodyne receiver for converting a 0.38 to 18GHz signal received by an antenna into a 1.8 ± 0.5GHz signal with a fixed frequency includes a local oscillation source unit 1 and eight receiving channels 2. It should be noted that only one receiving channel 2 is illustrated in the example of fig. 1, but does not hinder the understanding of those skilled in the art.

The local oscillation source unit 1 generates a 100MHz reference signal through the crystal oscillator module 11, and generates a path of 12GHz local oscillation signal, a path of 31-39 GHz frequency hopping local oscillation signal, and a path of 28.8GHz and 21.84GHz switching point frequency local oscillation signal after the reference signal is processed by the comb spectrum, frequency hopping source, point frequency source, and frequency multiplier through the first power divider 12, referring to fig. 2, the local oscillation source unit includes the crystal oscillator module 11, the first power divider 12, the first local oscillation source unit 13, the second local oscillation source unit 14, and the third local oscillation source unit 15. The crystal oscillator module 11 is configured to generate a 100MHz reference signal, and output of the crystal oscillator module is connected to the first local oscillator source unit 13, the second local oscillator source unit 14, and the third local oscillator source unit 15 through the first power divider 12. That is, the 100MHz reference signal generated by the crystal oscillator module 11 is divided by the first power divider 12 and then input to the first local oscillator source unit 13, the second local oscillator source unit 14, and the third local oscillator source unit 15.

The first local oscillator unit 13 includes a comb spectrum 131, a first filter 132, and a second power divider 133 sequentially connected in series. Wherein the first filter 132 is a 12GHz band pass filter. The comb spectrum 131, that is, the comb spectrum generator, generates comb spectrum signals of several fundamental frequencies from the 100MHz reference signal divided by the first power divider 12, filters 12GHz signals by the first filter 132, and then divides the comb spectrum signals by the second power divider 133 to serve as 12GHz local oscillation signals of each receiving channel 2. In this specification, the sequential connection in series means that the output of the former is connected to the input of the latter.

The second local oscillator unit 14 includes a frequency hopping source 141, a first mixer 142, a second filter 143, a first frequency multiplier 144, and a third power divider 145, which are sequentially connected in series. The frequency hopping source 141 is a 3.5-7.5 GHz frequency hopping source, and generates a 3.5-7.5 GHz signal output by taking the 100MHz reference signal divided by the first power divider 12 as an input. The first mixer 142 is connected to the first local oscillator unit 13, and mixes the 12GHz signal output by the first local oscillator unit 13 as a mixing source with the 3.5 to 7.5GHz signal output by the frequency hopping source 141 to output a 15.5 to 19.5GHz signal. The second filter 143 is a 15.5-19.5 GHz band pass filter. The 15.5-19.5 GHz signal output by the first mixer 142 is filtered by the second filter 143 and then frequency-multiplied by the first frequency multiplier 144 to output a 31-39 GHz signal. The 31-39 GHz signal output by the first frequency multiplier 144 is divided by the third power divider 145 and then used as the 31-39 GHz frequency-hopping local oscillator signal of each receiving channel 2.

The third local oscillation source unit 15 includes a first frequency local oscillation source unit 151, a second frequency local oscillation source unit 152, and a switching combiner power divider 153. The inputs of the first frequency local oscillator unit 151 and the second frequency local oscillator unit 152 are connected to the output of the first power divider 12. The outputs of the first frequency local oscillation source unit 151 and the second frequency local oscillation source unit 152 are connected to the input of the switching combiner power divider 153. The first frequency local oscillator unit 151 includes a first frequency point frequency source 1511, a third filter 1512, and a second frequency multiplier 1513 sequentially connected in series. The input of the first frequency point frequency source 1511 is the input of the first frequency local oscillator unit 151. The first frequency point frequency source 1511 is a 14.4GHz point frequency source, and generates a 14.4GHz signal output by taking the 100MHz reference signal split by the first power divider 12 as an input. The third filter 1512 is a 14.4GHz band pass filter. The 14.4GHz signal output by the first frequency point frequency source 1511 is filtered by the third filter 1512, and then multiplied by the frequency of the second frequency multiplier 1513, so as to output a 28.8GHz signal. The output of the second frequency multiplier 1513 is the output of the first frequency local oscillation source unit 151. The 28.8GHz signal output by the second frequency multiplier 1513 is input to the switching combiner power divider 153. The second frequency local oscillator source unit 152 includes a second frequency point frequency source 1521, a fourth filter 1522 and a third frequency multiplier 1523, which are sequentially connected in series. The input of the second frequency point frequency source 1521 is the input of the second frequency local oscillator unit 152. The second frequency point frequency source 1521 is a 10.92GHz point frequency source, and takes the 100MHz reference signal split by the first power divider 12 as input, and generates a 10.92GHz signal for output. The fourth filter 1522 is a 10.92GHz band pass filter. The 10.92GHz signal output by the second frequency point frequency source 1521 is filtered by the fourth filter 1522, and then frequency-multiplied by the third frequency multiplier 1523 to output a 21.84GHz signal. The output of the third frequency multiplier 1523 is the output of the second frequency local oscillator 152. The 21.84GHz signal output by the third frequency multiplier 1523 is input to the switching combiner power divider 153.

The receiving channel 2 includes a receiving unit 21, a frequency conversion processing unit 22, a harmonic processing unit 23, a first frequency mixing unit 24, a first intermediate frequency unit 25, a second frequency mixing unit 26, and a second intermediate frequency unit 27, which are sequentially connected in series.

The receiving unit 21 is connected to the input. The input to which the receiving unit 21 is connected is an antenna. The signal input by the receiving unit 21 is a 0.38 to 18GHz signal received by the antenna. The receiving unit 21 includes an amplitude limiter 211, a first low noise amplifier 212 and a first digitally controlled attenuator 213, which are sequentially connected in series. The input of slicer 211 is also the input of receiving unit 21; the output of the first digitally controlled attenuator 213 is also the output of the receiving unit 21.

The frequency conversion processing unit 22 includes a low-band frequency conversion unit 221, a middle-band frequency conversion unit 222, and a high-band frequency conversion unit 223. The low frequency band, the middle frequency band and the high frequency band are respectively signals of three frequency bands of 0.38-2 GHz, 2-6 GHz and 6-18 GHz. The inputs and outputs of the low band frequency converting unit 221, the mid band frequency converting unit 222 and the high band frequency converting unit 223 are connected to the output of the first switch 228 and the input of the second switch 229, respectively. That is, the low band frequency converting unit 221, the middle band frequency converting unit 222, and the high band frequency converting unit 223 are in a parallel relationship. The input of the first switch 228 is connected to the output of the receiving unit 21; the output of the second switch 229 is connected to the input of the harmonic processing unit 23.

The low-band frequency conversion unit 221 is configured to filter out 0.38 to 2GHz signals from the input signals through the band-pass filter, mix the filtered signals with 12GHz local oscillation signals output by the local oscillation source unit 1 through the mixer, and then move the 0.38 to 2GHz signals to 12.38 to 14GHz, and includes a first band-pass filter 2211, a second low-noise amplifier 2212, a first switch filter 2213, a second mixer 2214, a second band-pass filter 2215, and a first amplifier 2216, which are sequentially connected in series. The input of the first bandpass filter 2211 is also the input of the low band frequency converting unit 221; the output of the first amplifier 2216 is also the output of the low band frequency converting unit 221. The first bandpass filter 2211 is a 0.38-2 GHz bandpass filter. The first switch filter 2213 is a 0.38-2 GHz switch filter bank. The second mixer 2214 is connected to the 12GHz local oscillator signal output of the local oscillator source unit 1, that is, the mixing input of the second mixer 2214 is connected to the output of the first local oscillator source unit 13, specifically, to the output of the second power divider 133. The second mixer 2214 mixes the 12GHz signal as a mixing source with the 0.38-2 GHz signal filtered and output by the first switch filter 2213 and outputs a 12.38-14 GHz signal. The second bandpass filter 2215 is a 12.38-14 GHz bandpass filter.

The middle frequency band frequency conversion unit 222 is configured to filter the input signal through a band pass filter to obtain a 2-6 GHz signal, and then mix the 2-6 GHz signal with a 12GHz local oscillator signal output by the local oscillator source unit 1 through a mixer so as to shift the 2-6 GHz signal to 14-18 GHz. The high-band frequency conversion unit 223 is configured to filter the input signal into a 6-18 GHz signal through a band-pass filter, and includes a third band-pass filter 2221, a third low-noise amplifier 2222, a second switch filter 2223, a third mixer 2224, a fourth band-pass filter 2225, and a second amplifier 2226, which are sequentially connected in series. The input of the third band-pass filter 2221 is the input of the intermediate frequency band frequency conversion unit 222; the output of the second amplifier 2226 is the output of the intermediate frequency band converting unit 222. The third band pass filter 2221 is a 2-6 GHz band pass filter. The second switch filter 2223 is a 2-6 GHz switch filter bank. The third mixer 2224 is connected to the 12GHz local oscillation signal output of the local oscillation source unit 1, that is, the mixing input of the third mixer 2224 is connected to the output of the first local oscillation source unit 13, specifically, the output of the second power divider 133. The third mixer 2224 uses the 12GHz signal as a mixing source, mixes with the 2 to 6GHz signal filtered and output by the second switch filter 2223, and outputs a 14 to 18GHz signal. The second bandpass filter 2215 is a 14-18 GHz bandpass filter.

The high band frequency conversion unit 223 includes a fifth band-pass filter 2231, a fourth low noise amplifier 2232 and a third switching filter 2233 sequentially connected in series. The input of the fifth bandpass filter 2231 is also the input of the high band frequency converting unit 223; the output of the third switching filter 2233 is also the output of the high band frequency converting unit 223. The fifth bandpass filter 2231 is a 6-18 GHz bandpass filter. The third switch filter 2233 is a 6-18 GHz switch filter bank.

The harmonic processing unit 23 is configured to filter the input signal into a 6-10 GHz signal and a 10-18 GHz signal through two bandpass filters connected in parallel via a switch, and output the signals through the switch, and includes a third amplifier 231, a third switch 232, a sixth bandpass filter 233, a seventh bandpass filter 234, and a fourth switch 235. The sixth band-pass filter 233 is a 6 to 10GHz band-pass filter, and the seventh band-pass filter 234 is a 10 to 18GHz band-pass filter. The input of the third amplifier 231, i.e. the input of the harmonic processing unit 23, is connected to the output of the frequency conversion processing unit 22, i.e. to the output of the second switch 229. The output of the third amplifier 231 is connected to the input of the third switch 232. The inputs and outputs of the sixth and seventh

bandpass filters

233 and 234 are connected to the output of the third switch 232 and the input of the fourth switch 235, respectively. That is, the sixth band-pass filter 233 and the seventh band-pass filter 234 are connected in parallel. The output of the fourth switch 235 is also the output of the harmonic processing unit 23.

The first frequency mixing unit 24 mixes the frequency-hopping local oscillation signals of 31 GHz to 39GHz output by the local oscillation source unit 1 and input via the phase shifter to generate signals of 27 ± 0.5GHz and 20.04 ± 0.5GHz, and includes a fourth frequency mixer 241 and a first phase shifter 242. The input of the fourth mixer 241 is connected to the output of the harmonic processing unit 23, specifically to the output of the fourth switch 235. The mixing input of the fourth mixer 241 is connected to the output of the first phase shifter 242. The output of the fourth mixer 241 is connected to the input of the first intermediate frequency unit 25. The input of the first phase shifter 242 is connected to the 31-39 GHz frequency-hopping local oscillator signal output of the local oscillator source unit 1, that is, the input of the first phase shifter 242 is connected to the output of the second local oscillator source unit 14, and more specifically, to the output of the third power divider 145. The output of the first phase shifter 242 is connected to the mixing input of the fourth mixer 241. It should be noted that the effective mixing input of the fourth mixer 241 is a frequency hopping signal of 32.04 to 38.04 GHz. The second local oscillator source unit 14 outputs 31 to 39GHz with redundancy.

The first intermediate frequency unit 25 is configured to filter the 27 ± 0.5GHz signal and the 20.04 ± 0.5GHz signal generated by the first frequency mixing unit 24 through two bandpass filters connected in parallel through a switch, respectively, and output the filtered 27 ± 0.5GHz signal and 20.04 ± 0.5GHz signal through the switch, and includes a fifth switch 251, an eighth bandpass filter 252, a ninth bandpass filter 253, and a sixth switch 254. The eighth band-pass filter 252 is a 27 ± 0.5GHz band-pass filter, and the ninth band-pass filter 253 is a 20.04 ± 0.5GHz band-pass filter. An input of the fifth switch 251, i.e. an input of the first intermediate frequency unit 25, is connected to an output of the first mixing unit 24, more specifically to an output of the fourth mixer 241. The output of the fifth switch 251 is connected to the inputs of an eighth band-pass filter 252 and a ninth band-pass filter 253. The outputs of the eighth 252 and ninth 253 band-pass filters are connected to the inputs of a sixth switch 254. That is, the inputs and outputs of the eighth band pass filter 252 and the ninth band pass filter 253 are connected to the fifth switch 251 and the sixth switch 254, respectively, in parallel with each other. The output of the sixth switch 254 is connected to the second mixing unit 26.

The second frequency mixing unit 26 mixes the signals by a frequency mixer and dot-frequency local oscillation signals of 28.8GHz and 21.84GHz output by the local oscillation source unit 1 and input through a phase shifter to generate signals of 1.8 ± 0.5GHz, and includes a fifth frequency mixer 261 and a second phase shifter 262. An input of the fifth mixer 261, i.e. an input of the second mixing unit 26, is connected to an output of the first intermediate frequency unit 25, more specifically to an output of the sixth switch 254. The mixing input of the fifth mixer 261 is connected to the output of the second phase shifter 262. The output of the fifth mixer 261 is connected to the input of the second intermediate frequency unit 27. The input of the second phase shifter 262 is connected to the outputs of the 28.8GHz and 21.84GHz local oscillator signals of the local oscillator source unit 1, that is, the output of the third local oscillator source unit 15, and more specifically, the output of the switching combiner power divider 153. The output of the second phase shifter 262 is connected to the mixing input of the fifth mixer 261.

The second intermediate frequency unit 27 is configured to process and output the 1.8 ± 0.5GHz signal generated by the second frequency mixing unit 26 through a filter, an amplifier and a digitally controlled attenuator, and includes a tenth band-pass filter 271, a fourth amplifier 272 and a second digitally controlled attenuator 273, which are connected in series in sequence. Wherein, the tenth band-pass filter is a 1.8 plus or minus 0.5GHz band-pass filter.

Claims

1. An eight-channel amplitude-phase consistent superheterodyne receiver is characterized by comprising a local oscillation source unit (1) and eight receiving channels (2); the local oscillation source unit (1) generates a 100MHz reference signal through the crystal oscillator module (11), divides the signal through the first power divider (12), and generates a path of 12GHz local oscillation signal, a path of 31-39 GHz frequency hopping local oscillation signal, and a path of 28.8GHz and 21.84GHz switch-switched point frequency local oscillation signal after comb spectrum, frequency hopping source, point frequency source and frequency multiplier processing; the receiving channel (2) comprises a receiving unit (21), a frequency conversion processing unit (22), a harmonic processing unit (23), a first frequency mixing unit (24), a first intermediate frequency unit (25), a second frequency mixing unit (26) and a second intermediate frequency unit (27) which are sequentially connected in series; the receiving unit (21) is connected with the input; the frequency conversion processing unit (22) comprises a low-frequency-band frequency conversion unit (221), a medium-frequency-band frequency conversion unit (222) and a high-frequency-band frequency conversion unit (223); the low-frequency-band frequency conversion unit (221), the medium-frequency-band frequency conversion unit (222) and the high-frequency-band frequency conversion unit (223) are connected in parallel through switches, the input end of the low-frequency-band frequency conversion unit is connected with the output end of the receiving unit (21) through a first switch (228), and the output end of the low-frequency-band frequency conversion unit is connected with the input end of the harmonic processing unit (23) through a second switch (229); the low-frequency conversion unit (221) is used for filtering an input signal into a 0.38-2 GHz signal through a band-pass filter, and then mixing the 0.38-2 GHz signal with a 12GHz local oscillator signal output by the local oscillator source unit (1) through a mixer to move the 0.38-2 GHz signal to 12.38-14 GHz; the intermediate frequency band frequency conversion unit (222) is used for filtering an input signal into a 2-6 GHz signal through a band-pass filter, and then mixing the 2-6 GHz signal with a 12GHz local oscillation signal output by the local oscillation source unit (1) to move the 2-6 GHz signal to 14-18 GHz; the high-frequency-band frequency conversion unit (223) is used for filtering an input signal into a 6-18 GHz signal through a band-pass filter; the harmonic processing unit (23) is used for filtering the input signals into 6-10 GHz signals and 10-18 GHz signals respectively through two band-pass filters which are connected in parallel through a switch and then outputting the signals through the switch; the first frequency mixing unit (24) mixes the frequency through a frequency mixer and a frequency hopping local oscillator signal of 31-39 GHz output by the local oscillator source unit (1) and input by a phase shifter to generate signals of 27 +/-0.5 GHz and 20.04 +/-0.5 GHz; the first intermediate frequency unit (25) is used for filtering 27 +/-0.5 GHz signals and 20.04 +/-0.5 GHz signals generated by the first frequency mixing unit (24) through two band-pass filters connected in parallel through a switch to obtain the 27 +/-0.5 GHz signals and the 20.04 +/-0.5 GHz signals respectively, and then outputting the signals through the switch; the second frequency mixing unit (26) mixes the frequency with the dot frequency local oscillation signals of 28.8GHz and 21.84GHz output by the local oscillation source unit (1) and input by the phase shifter through a frequency mixer to generate signals of 1.8 +/-0.5 GHz; the second intermediate frequency unit (27) is used for processing and outputting the 1.8 +/-0.5 GHz signal generated by the second mixing unit (26) through a filter, an amplifier and a numerical control attenuator.

2. The eight-channel amplitude-phase coherent superheterodyne receiver according to claim 1, wherein the local oscillation source unit (1) includes a crystal oscillator module (11), a first power divider (12), a first local oscillation source unit (13), a second local oscillation source unit (14), and a third local oscillation source unit (15); the output of the crystal oscillator module (11) is connected with a first local oscillation source unit (13), a second local oscillation source unit (14) and a third local oscillation source unit (15) through a first power divider (12) and is used for generating a 100MHz reference signal; the first local vibration source unit (13) comprises a comb spectrum (131), a first filter (132) and a second power divider (133) which are sequentially connected in series; the first filter (132) is a 12GHz band-pass filter; the comb spectrum (131) generates comb spectrum signals of fundamental frequencies for a plurality of times by using 100MHz reference signals, then 12GHz signals are filtered by a first filter (132), and the comb spectrum signals are subjected to power division by a second power divider (133) and then serve as 12GHz local oscillation signals of each receiving channel (2); the second local vibration source unit (14) comprises a frequency hopping source (141), a first mixer (142), a second filter (143), a first frequency multiplier (144) and a third power divider (145) which are sequentially connected in series; the frequency hopping source (141) is a 3.5-7.5 GHz frequency hopping source, and a 100MHz reference signal is used as an input to generate a 3.5-7.5 GHz signal for output; the first mixer (142) is connected with the first local vibration source unit (13), and outputs 15.5-19.5 GHz signals after mixing the 12GHz signals output by the first local vibration source unit (13) as a mixing source and the 3.5-7.5 GHz signals output by the frequency hopping source (141); the second filter (143) is a 15.5-19.5 GHz band-pass filter; the 15.5-19.5 GHz signals filtered and output by the second filter (143) are frequency-doubled by the first frequency multiplier (144) and then 31-39 GHz signals are output; the 31-39 GHz signal output by the first frequency multiplier (144) is subjected to power division by the third power divider (145) and then is used as a 31-39 GHz frequency hopping local oscillation signal of each receiving channel (2); the third local vibration source unit (15) comprises a first frequency local vibration source unit (151), a second frequency local vibration source unit (152) and a switch combined power divider (153); the inputs of the first frequency local oscillation source unit (151) and the second frequency local oscillation source unit (152) are connected with the output of the first power divider (12); the outputs of the first frequency local vibration source unit (151) and the second frequency local vibration source unit (152) are connected with the input of the switch combined power divider (153); the first frequency local oscillation source unit (151) comprises a first frequency point frequency source (1511), a third filter (1512) and a second frequency multiplier (1513) which are sequentially connected in series; the first frequency point frequency source (1511) is a 14.4GHz point frequency source, and a 100MHz reference signal is used as an input to generate a 14.4GHz signal output; the third filter (1512) is a 14.4GHz band-pass filter; the 14.4GHz signal filtered and output by the third filter (1512) is output to a 28.8GHz signal after passing through a second frequency multiplier (1513) and is input to the switch combiner power divider (153); the second frequency local vibration source unit (152) comprises a second frequency point frequency source (1521), a fourth filter (1522) and a third frequency multiplier (1523) which are sequentially connected in series; the second frequency point frequency source (1521) is a 10.92GHz point frequency source, and a 100MHz reference signal is used as an input to generate a 10.92GHz signal output; the fourth filter (1522) is a 10.92GHz band-pass filter; the 10.92GHz signal filtered and output by the fourth filter (1522) is output to the 21.84GHz signal after passing through the third frequency multiplier (1523) and is input to the switch combination power divider (153).

3. An eight-channel amplitude-coherent superheterodyne receiver according to claim 1, wherein the low-band frequency converting unit (221) comprises, sequentially connected in series, a first bandpass filter (2211), a second low-noise amplifier (2212), a first switching filter (2213), a second mixer (2214), a second bandpass filter (2215) and a first amplifier (2216); wherein, the first band-pass filter (2211) is a 0.38-2 GHz band-pass filter; the first switch filter (2213) is a 0.38-2 GHz switch filter group; the second frequency mixer (2214) is connected with the local oscillation source unit (1) for outputting a 12GHz local oscillation signal; the second mixer (2214) takes the 12GHz signal output by the local oscillation source unit (1) as a mixing source, and outputs a 12.38-14 GHz signal after mixing with the 0.38-2 GHz signal filtered and output by the first switch filter (2213); the second band-pass filter (2215) is a 12.38-14 GHz band-pass filter.

4. An eight-channel amplitude-coherent superheterodyne receiver according to claim 1, wherein the intermediate-band frequency converting unit (222) comprises, sequentially connected in series, a third band-pass filter (2221), a third low-noise amplifier (2222), a second switching filter (2223), a third mixer (2224), a fourth band-pass filter (2225) and a second amplifier (2226); wherein the third band-pass filter (2221) is a 2-6 GHz band-pass filter; the second switch filter (2223) is a 2-6 GHz switch filter bank; the third mixer (2224) is connected with the local oscillation source unit (1) for outputting a 12GHz local oscillation signal; the third mixer (2224) takes the 12GHz signal output by the local oscillation source unit (1) as a mixing source, and outputs a 14-18 GHz signal after mixing with the 2-6 GHz signal filtered and output by the second switch filter (2223); the second band-pass filter (2215) is a 14-18 GHz band-pass filter.

5. The eight-channel amplitude-phase coherent superheterodyne receiver according to claim 1, wherein the high-band frequency conversion unit (223) includes a fifth bandpass filter (2231), a fourth low-noise amplifier (2232), and a third switching filter (2233) connected in series in this order; wherein the fifth band-pass filter (2231) is a 6-18 GHz band-pass filter; the third switch filter (2233) is a 6-18 GHz switch filter bank.

6. An eight-channel amplitude-phase coherent superheterodyne receiver according to claim 1, wherein the harmonic processing unit (23) includes a third amplifier (231), a third switch (232), a sixth band-pass filter (233), a seventh band-pass filter (234), and a fourth switch (235); wherein, the input of the third amplifier (231) is connected with the output of the frequency conversion processing unit (22), and the output is connected with the input of the third switch (232); the inputs of the sixth band-pass filter (233) and the seventh band-pass filter (234) are connected with the output of the third switch (232), and the output is connected with the input of the fourth switch (235); wherein the sixth band-pass filter (233) is a 6-10 GHz band-pass filter, and the seventh band-pass filter (234) is a 10-18 GHz band-pass filter.

7. An eight-channel amplitude-phase coherent superheterodyne receiver according to claim 1, wherein the first mixing unit (24) comprises a fourth mixer (241) and a first phase shifter (242); the input of the fourth mixer (241) is connected with the output of the harmonic processing unit (23), the mixing input is connected with the output of the first phase shifter (242), and the output is connected with the input of the first intermediate frequency unit (25); the input of the first phase shifter (242) is connected with the frequency hopping local oscillator signal output of the local oscillator source unit (1) from 31 GHz to 39GHz, and the output is connected with the mixing input of the fourth mixer (241).

8. An eight-channel amplitude-coherent superheterodyne receiver, according to claim 1, wherein the first intermediate frequency unit (25) comprises a fifth switch (251), an eighth band-pass filter (252), a ninth band-pass filter (253) and a sixth switch (254); the input of the fifth switch (251) is connected with the output of the first mixing unit (24), and the output is connected with the inputs of the eighth band-pass filter (252) and the ninth band-pass filter (253); the outputs of the eighth band-pass filter (252) and the ninth band-pass filter (253) are connected with the input of the sixth switch (254); the output of the sixth switch (254) is connected with the second mixing unit (26); the eighth band-pass filter (252) is a 27 +/-0.5 GHz band-pass filter, and the ninth band-pass filter (253) is a 20.04 +/-0.5 GHz band-pass filter.

9. An eight-channel amplitude-phase coherent superheterodyne receiver according to claim 1, wherein the second mixing unit (26) comprises a fifth mixer (261) and a second phase shifter (262); the input of the fifth mixer (261) is connected with the output of the first intermediate frequency unit (25), the mixing input is connected with the output of the second phase shifter (262), and the output is connected with the input of the second intermediate frequency unit (27); the input of the second phase shifter (262) is connected with the output of the local oscillation source unit (1) at the spot frequency local oscillation signals of 28.8GHz and 21.84GHz, and the output is connected with the mixing input of the fifth mixer (261).

10. An eight-channel amplitude-coherent superheterodyne receiver according to claim 1, wherein the receiving unit (21) comprises, sequentially connected in series, a limiter (211), a first low-noise amplifier (212) and a first digitally-controlled attenuator 213; the second intermediate frequency unit (27) comprises a tenth band-pass filter (271), a fourth amplifier (272) and a second numerical control attenuator (273) which are sequentially connected in series; wherein, the tenth band-pass filter is a 1.8 plus or minus 0.5GHz band-pass filter.