A dual-band equivalent height simulator

Abstract

The invention relates to a dual-band equivalent height simulation device. The down-conversion module is used to receive input radio frequency signals and process them respectively according to the height of the radio frequency signals; the radio-frequency storage module is used to delay the intermediate frequency signal transmitted from the down-conversion module. real-time processing; the up-conversion module is used to receive the signal output from the down-conversion module or the RF storage module, and process it separately according to the height of the signal; the attenuation module is used to attenuate the RF signal output from the up-conversion module accordingly; the control module is used It analyzes the received instructions and controls the actions of the down-conversion module, RF storage module, up-conversion module and attenuation module. The invention supports both C-band and At the same time, it can be adapted to the testing of altimeters with various modulation methods such as radio altimeters, radar altimeters, and phase-modulated altimeters.

Description

technical field [0001] The invention relates to the field of electrical technology, in particular to a dual-band equivalent height simulation device. Background technique [0002] Most of the equivalent height simulation devices currently used use the inherent delay characteristics of the cable and are implemented in the form of a cable delay line. Therefore, it can only realize the simulation of the equivalent height at a fixed frequency point and a fixed height. Therefore, in the test of the altimeter, It can only be adapted to the test of the altimeter signal with a single-frequency fixed altitude value, but not the test of the FM altimeter. [0003] Since the cable has inherent delay characteristics, the required delay value can be achieved by controlling the length of the cable, thereby achieving the purpose of equivalent height simulation. The advantage of implementing equivalent height simulation with cable delay is that the system is simple, but it has the disadvant...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned analysis, the present invention aims to provide a dual-band equivalent height simulation device, in order to solve the problem that the existing height simulation device cannot adapt to the multi-frequency point height value continuously variable altimeter test requirements

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