An improved transponder ranging signal conversion circuit

Abstract

An improved responder distance measurement signal conversion circuit comprises a two-way interface circuit, a two-way distance measurement switch, a temperature compensation network A, a temperature compensation network B and an anti-phase adder. The two-way distance measurement signals demodulated by the receiving portion of the responder reach the two-way distance measurement switch through the two-way interface circuit and are subjected to the selection through the switch, selected one-way distance measurement signals are subjected to the temperature compensation adjustment of the distance measurement signal amplitude through the corresponding temperature compensation network, and the distance measurement signals through the amplitude temperature compensation adjustment to enter the anti-phase adder and perform output. Five resister temperature compensation networks are added behind the distance measurement switch to realize the temperature compensation adjustment of the amplitude, effectively solve the problem that the amplitudes of the distance measurement signals are fluctuant with the temperature because the responder receives the demodulation and emits the temperature changing features of the modulation circuit and improve the high-low temperature stability of the distance measurement signals of the responder.

Description

technical field [0001] The invention belongs to the field of aerospace measurement and control, and relates to an improved ranging signal conversion circuit of a transponder. Background technique [0002] The transponder is a key stand-alone machine in the aerospace measurement and control system, and the temperature variation performance of the ranging signal amplitude (modulation degree) directly affects the function and index of the satellite ranging channel. The importance cannot be underestimated. [0003] The principle block diagram of the internal ranging channel of the transponder is as follows: figure 1 shown. Whether the ranging signal amplitude (modulation degree) of the transponder meets the requirements is determined by the demodulation amplitude of the receiving demodulation circuit of the transponder, the gain of the ranging circuit and the modulation sensitivity of the modulating and transmitting circuit of the transponder. [0004] The input signal of the...

AI Technical Summary

Problems solved by technology

[0012] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide an improved transponder distance measurement signal conversion circuit, which solves the problem caused by the temperature change characteristics of the transponder reception demodulation and transmission modulation circuits. The range signal amplitude fluctuates with temperature

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