Satellite Ka-frequency-band receiving channel based on single-pulse 0/pi modulating

A receiving channel and monopulse technology, applied in the field of satellite self-tracking system, can solve the problems of large volume, high power consumption, poor maintainability, etc., and achieve the effect of low noise figure, low loss and high reliability

Active Publication Date: 2014-08-06
BEIJING RES INST OF TELEMETRY +1
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  • Claims
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AI Technical Summary

Problems solved by technology

The disadvantage of the traditional dual-channel system is that when the relative gain and relative phase between the two channels change, the receiver system needs to readjust the gain and phase, the maintainability is not strong, and there are also large volume and high power consumption. and other shortcomings

Method used

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  • Satellite Ka-frequency-band receiving channel based on single-pulse 0/pi modulating
  • Satellite Ka-frequency-band receiving channel based on single-pulse 0/pi modulating
  • Satellite Ka-frequency-band receiving channel based on single-pulse 0/pi modulating

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Embodiment Construction

[0022] figure 1 As shown, the receiving channel based on single pulse 0 / π modulation in the Ka frequency band of the present invention is composed of a low noise amplifier, a waveguide filter, a high phase modulation precision 0 / π modulator, and a combined harmonic mixer, and the cascade interface is BJ260 ( WR34) waveguide port to meet the application requirements of Ka frequency band.

[0023] The signal is amplified by a low-noise amplifier, filtered by a filter, and the low-frequency modulation signal is applied to a 0 / π modulator to perform 0 / π modulation on the difference signal to separate the spectrum of the difference signal, and finally the combination of the difference signal and the sum signal is completed Single channel transmission.

[0024] The two-stage low-noise amplifier and the waveguide filter form the sum channel to amplify and filter the sum signal. The low-noise amplifier adopts a high-gain low-noise figure amplifier chip and a microstrip integrated d...

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Abstract

The invention relates to a satellite Ka-frequency-band receiving channel based on single-pulse 0/pi modulating. The satellite Ka-frequency-band receiving channel comprises a low noise amplifier, a filter, a 0/pi modulator and a combiner harmonic mixer; after a sum signal is firstly amplified through the low noise amplifier, out-of-band-signal clutter suppression is carried out on the sum signal through the filter, and the sum signal enters one input end of the combiner harmonic mixer; after a different signal is sequentially amplified through the low noise amplifier, out-of-band-signal clutter suppression is carried out on the different signal through the filter, and after 0/pi phase modulation is carried out through the 0/pi modulator, the different signal enters the other input end of the combiner harmonic mixer; signal adding is firstly carried out on the sum signal and the different signal inside the combiner harmonic mixer to form one channel of signal, then down conversion is carried out to generate intermediate frequencies to output the signal, and single-channel transmission is achieved. The satellite Ka-frequency-band receiving channel has the advantages of being low in noise factor, high in carrier suppression, small in size, high in reliability and high in complex space environment adaptability, and can reliably work for a long time in a satellite self-tracking system.

Description

technical field [0001] The invention relates to a receiving channel based on single-pulse 0 / π modulation in the Ka frequency band for satellites, which has the characteristics of low noise figure, high carrier suppression, small size, high reliability, adaptability to complex space environments, etc., and can be widely used in satellite autonomous systems. in the tracking system. Background technique [0002] The single-channel single-pulse modulation system plays an important role in the fields of aerospace telemetry and remote control, and target tracking, and has been widely used in receiving systems such as satellite remote sensing, meteorology, and relay transmission. It has the advantages of saving channels, simple equipment, high reliability, and tracking The advantages of high precision. The shortcomings of the traditional dual-channel system are that when the relative gain and relative phase between the two channels change, the receiver system needs to readjust the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/227H01P5/107
Inventor 王冬冬刘德喜何彩分于洋王莉莉沈鹏
Owner BEIJING RES INST OF TELEMETRY
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