Pulse coherent answering device

Abstract

The invention provides a pulse-coherent answering device, which mainly comprises a microwave frequency conversion combination, an intermediate frequency filtering and amplification combination, a digital processing combination and an overall power module, wherein the microwave frequency conversion combination mainly comprises a circulator, an amplitude limiter, a preselected filter, a low noise amplifier, a down-converter, a phase-lock source, a reference crystal oscillator, an up-converter, a radio-frequency filter and a solid-state power amplifier module; the intermediate frequency filteringand amplification combination mainly comprises an intermediate frequency filter, a front intermediate frequency amplifier, a power divider, a detector, a frequency-selective filter and a rear intermediate frequency amplifier; and the digital processing combination mainly comprises a dual-channel high-speed A / D circuit, a clock driver, a high-speed D / A circuit, an FPGA signal processing circuit, an RS422 interface circuit, an EEPROM and a telemetry parameter generation circuit. The pulse coherent answering device can quickly and conveniently meet the adjustment requirements of parameters, suchas forward pulse delay time and overall closure time on different occasions through the RS422 interface circuit and the EEPROM after product hardware and software platforms are solidified.

Description

technical field [0001] The present application relates to the technical field of aerospace measurement and control communication equipment, and more specifically, to a pulse coherent response device with adjustable delay. Background technique [0002] The pulse coherent response device is mainly used for the external measurement safety subsystem or measurement subsystem of the launch vehicle. It is used to cooperate with the ground pulse radar to increase the system operating distance and improve the system measurement accuracy, complete the rocket tracking measurement, and provide flight tests. Ballistic data processed for postmortem analysis. [0003] According to the characteristics of the pulse radar of the existing ground station and the technical requirements of the Long March series of rockets, the pulse delay time of the pulse coherent response device is generally 6.4 μs or 12.8 μs, the closing time of the whole machine is generally between 20 μs and 29 μs, and the r...

AI Technical Summary

Problems solved by technology

Although the FPGA signal processing part can realize the software adjustment of parameters such as forwarding pulse delay time and blocking time, it needs to perform software version update, re-solidification, and testing according to actual requirements, especially when it is applied in the field of bullets (arrows). Under the requirements of engineering management, the workload is large, the technical status is many, and the parameter changes are not flexible enough

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