CN217034238U

CN217034238U - Double-channel large dynamic SSR and ADS-B response receiver

Info

Publication number: CN217034238U
Application number: CN202220623326.XU
Authority: CN
Inventors: 刘爱森; 秦银; 孙建华
Original assignee: Sichuan Jiuzhou ATC Technology Co Ltd
Current assignee: Sichuan Jiuzhou ATC Technology Co Ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-07-22
Anticipated expiration: 2032-03-21

Abstract

The utility model discloses a double-channel large dynamic SSR (simple sequence repeat) and ADS-B (automatic dependent surveillance broadcast) answer receiver, which comprises an upper antenna, a lower antenna, a first radio frequency channel, a second radio frequency channel, a first intermediate frequency channel, a second intermediate frequency channel and a digital processing module, wherein the upper antenna, the first radio frequency channel, the first intermediate frequency channel and the digital processing module are sequentially connected, and the lower antenna, the second radio frequency channel, the second intermediate frequency channel and the digital processing module are sequentially connected. The receiver is designed in a single radio frequency channel to simultaneously complete the signal receiving of two frequencies, thereby improving the reuse rate of the receiving channel. The multiplexing of the radio frequency receiving channel greatly reduces the cost, the volume, the weight and the power consumption of the receiver, has strong market competitiveness, has two receiving modes of one receiver and strong universality, can be used for a plurality of platforms, and improves the multiplexing rate of the receiver.

Description

Double-channel large dynamic SSR and ADS-B response receiver

Technical Field

The utility model relates to the technical field of response receivers, in particular to a dual-channel large dynamic SSR and ADS-B response receiver.

Background

The SSR is an English abbreviation of a secondary radar and is widely applied to the fields of air traffic control, scene monitoring, friend or foe identification, guidance and the like.

ADS-B is an English abbreviation of broadcast type automatic correlation monitoring and refers to the mutual air-to-air correlation traffic monitoring between airplanes with the broadcast position reporting capability.

With the continuous improvement of scientific and technological technology and the continuous enhancement of aviation safety in recent years, the SSR answering receiver compatible with the ADS-B mode is equipped with more and more airplanes, so that the monitoring capability and the anti-collision capability of the airplanes are improved.

The existing response receiver mostly adopts independent design of an SSR (simple sequence repeat) and an ADS-B (automatic dependent Surveillance-broadcast) receiving channel, even if the same receiving channel is adopted for receiving, in order to ensure the normal work of an SSR receiving mode, a linear amplification working mode is mostly adopted, and the dynamic range of the ADS-B receiving mode is generally smaller than 60dB because the linear amplification working mode is limited by a receiving signal power range of the SSR (namely-21 dBm to-74 dBm +/-3 dB) and a working power range of an AD sampling chip (about +10dBm to-50 dBm).

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the double-channel large dynamic SSR and the ADS-B response receiver provided by the utility model solve the problem of low dynamic range of the ADS-B receiving mode.

In order to achieve the purpose of the utility model, the utility model adopts the technical scheme that: the utility model provides a big dynamic SSR of binary channels and ADS-B answer-back receiver, includes antenna, lower antenna, first radio frequency channel, second radio frequency channel, first intermediate frequency channel, second intermediate frequency channel and digital processing module, last antenna, first radio frequency channel, first intermediate frequency channel and digital processing module connect gradually, antenna, second radio frequency channel, second intermediate frequency channel and digital processing module connect gradually down.

Further: first radio frequency passageway/second radio frequency passageway is including the amplitude limiter, wave filter 1, amplifier and the wave filter 2 that connect gradually, the input of mixer is all connected to wave filter 2 and this vibration source, the output and the first intermediate frequency passageway/second intermediate frequency passageway of mixer are connected, the input and the antenna connection of amplitude limiter.

Further, the method comprises the following steps: the first intermediate frequency channel/the second intermediate frequency channel comprises a power distribution network, and an intermediate frequency selection 1 and an intermediate frequency selection 2 which are connected with the output end of the power distribution network.

Further, the method comprises the following steps: the power distribution network comprises an amplifier and a power divider connected with the output end of the amplifier.

Further, the method comprises the following steps: the intermediate frequency selection 1 comprises a filter 3, an amplifier and a filter 4 which are sequentially connected, the input end of the filter 3 is connected with the output end of the power divider, and the output end of the filter 4 is connected with the digital processing module.

Further: the intermediate frequency selection 2 comprises a filter 5 and a pair amplifier and filter 6 which are connected in sequence, the input end of the filter 5 is connected with the output end of the power divider, and the output end of the filter 6 is connected with the digital processing module.

The utility model has the beneficial effects that: the receiver is designed in a single radio frequency channel to simultaneously complete the signal receiving of two frequencies, thereby improving the reuse rate of the receiving channel. The multiplexing of the radio frequency receiving channel greatly reduces the cost, the volume, the weight and the power consumption of the receiver, has strong market competitiveness, has two receiving modes of one receiver and strong universality, can be used for a plurality of platforms, and improves the multiplexing rate of the receiver.

The utility model greatly improves the dynamic range of ADS-B receiving signals while completing the processing of the traditional SSR receiving mode and the ADS-B receiving mode in one receiving channel, greatly improves the nearest working distance and the farthest working distance of the receiver, and enables the equipped airplane to obtain the information of the positions of other airplanes in a larger range.

Drawings

FIG. 1 is a schematic diagram of a two-channel large dynamic SSR and ADS-B response receiver according to the present invention;

FIG. 2 is a schematic block diagram of an RF channel circuit according to the present invention;

fig. 3 is a schematic block diagram of an intermediate frequency channel circuit according to the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the utility model as defined and defined by the appended claims, and all changes that can be made by the utility model using the inventive concept are intended to be protected.

As shown in fig. 1, a two-channel large dynamic SSR and ADS-B responder includes an upper antenna, a lower antenna, a first rf channel, a second rf channel, a first if channel, a second if channel, and a digital processing module, where the upper antenna, the first rf channel, the first if channel, and the digital processing module are connected in sequence, and the lower antenna, the second rf channel, the second if channel, and the digital processing module are connected in sequence.

The utility model respectively sends SSR signals and ADS-B signals received by an upper antenna and a lower antenna to radio frequency channels corresponding to the upper antenna and the lower antenna for processing, the functions of two receiving channels are kept consistent, and each channel can independently complete the receiving of two modes of signals; each path of radio frequency signal generates an intermediate frequency signal after down-conversion and enters a power division network, the signal is divided into two paths of intermediate frequency signals after being amplified, wherein one path of intermediate frequency signal is separated from an SSR signal through an intermediate frequency filter and is subjected to linear amplification, the power interval of the input signal subjected to linear amplification is-21 dBm to-77 dBm, and the power interval of the output signal is +10dBm to-46 dBm; and separating the ADS-B signal by the other path of intermediate frequency signal through different intermediate frequency filters, and carrying out logarithmic amplification, wherein the power interval of the logarithmic amplified input signal is from +5dBm to-90 dBm, and the power interval of the compressed output signal is from +10dBm to-20 dBm.

Fig. 2 is a schematic block diagram of one of the radio frequency channels, where 12 is a receiving antenna, which receives radio frequency signals of 1030MHz and 1090MHz in the air, and the received signals enter an amplitude limiter via the antenna, and the amplitude limiter limits high-power transmission signals entering a transmitter of a mobile phone and high-power signals of other devices, so as to prevent a receiver from being damaged due to excessive signal power; the radio frequency signal after amplitude limiting enters a radio frequency band-pass filter 1, working signals of other equipment on the airplane and other interference signals received in the air are filtered, the center frequency of the filter is 1060MHz, the bandwidth is 80MHz, and the working frequencies of 1030MHz and 1090MHz can be ensured to normally pass through the filter; after filtering, sending the signal into a 20 low-noise radio frequency amplifier for amplification, and then sending the amplified signal into a 21 filter for filtering, so as to ensure that the image frequency signal is filtered out, and the interference to the normal operation of a receiver is avoided; the filtered signal and 23 local vibration sources are subjected to down-conversion frequency mixing, the frequency of the local vibration sources is 960MHz, and the frequency-mixed signal is subjected to down-conversion to be an intermediate frequency signal.

Fig. 3 is a schematic block diagram of a circuit of one of the intermediate frequency channels, in which an intermediate frequency signal is amplified by an intermediate frequency amplifier and then enters a power division network, where the power is divided into two paths of intermediate frequency signals, which are processed respectively; the intermediate frequency generated by mixing 1030MHz and 960MHz is 70MHz, the signal with the central frequency of 70MHz is sorted out by a 10 frequency-selecting component to be subjected to linear amplification, filtering and other processing, and the signal enters a digital processing module to be subjected to demodulation processing of an SSR response receiving signal. The intermediate frequency generated by mixing 1090MHz and 960MHz is 130MHz, the signal with the central frequency of 130MHz is separated by an 11 frequency-selecting component to be compressed, amplified, filtered and the like, and enters a digital processing module to be subjected to ADS-B receiving and demodulating processing. And the digital processing module completes demodulation, decoding, information analysis and other related processing of the signals in the two modes to obtain SSR inquiry information and ADS-B broadcast information.

The signals of two frequencies share one radio frequency channel for down conversion, are divided into two paths by a power division network, are separated by a frequency selection component, and are respectively subjected to linear amplification and logarithmic amplification, so that the 60dB dynamic range of the ADS-B receiving mode is increased to over 90dB while the related indexes of the SSR receiving mode are ensured.

Claims

1. The utility model provides a big dynamic SSR of binary channels and ADS-B answer receiver which characterized in that, includes antenna, lower antenna, first radio frequency passageway, second radio frequency passageway, first intermediate frequency passageway, second intermediate frequency passageway and digital processing module, last antenna, first radio frequency passageway, first intermediate frequency passageway and digital processing module connect gradually, antenna, second radio frequency passageway, second intermediate frequency passageway and digital processing module connect gradually down.

2. A double-channel large dynamic SSR and ADS-B answer receiver according to claim 1, wherein the first/second RF channel comprises a limiter, a filter 1, an amplifier and a filter 2 connected in sequence, the filter 2 and the local oscillator are both connected to an input of a mixer, an output of the mixer is connected to the first/second IF channel, and an input of the limiter is connected to the antenna.

3. The dual-channel large dynamic SSR and ADS-B responder receiver according to claim 1, wherein the first/second if channel comprises a power division network and an if frequency selection 1 and an if frequency selection 2 respectively connected to an output terminal of the power division network.

4. The dual-channel large dynamic SSR and ADS-B transponder receiver of claim 3, wherein the power division network includes an amplifier and a power divider connected to an output of the amplifier.

5. The dual-channel large dynamic SSR and ADS-B responder receiver according to claim 4, wherein the intermediate frequency selection module 1 comprises a filter 3, an amplifier and a filter 4 which are sequentially connected, an input end of the filter 3 is connected with an output end of the power divider, and an output end of the filter 4 is connected with the digital processing module.

6. The dual-channel large dynamic SSR and ADS-B responder receiver according to claim 4, wherein the intermediate frequency selector 2 comprises a filter 5 and a pair amplifier filter 6 which are connected in sequence, an input end of the filter 5 is connected with an output end of the power divider, and an output end of the filter 6 is connected with the digital processing module.