Receiver resistant to transient ultra-wideband electromagnetic interference

Abstract

A receiver resistant to transient ultra-wideband electromagnetic interference comprises an antenna which is connected with a power divider through a low-noise amplifier. The power divider is connected with the transient pulse detection circuit; the transient pulse detection circuit is connected with the time domain gating decision circuit; the time domain gating decision circuit is connected with the AGC module of the rear-end receiver; the power divider is connected with the delay circuit; the delay circuit is connected with the single-pole double-throw switch; the single-pole double-throw switch is respectively connected with the rear-end receiver and the load; interference signals are effectively filtered out from the time domain, and the anti-interference purpose is achieved.

Description

technical field [0001] The invention belongs to the technical field of radar and communication interference countermeasures, in particular to a receiver for anti-transient ultra-wideband electromagnetic interference signals. Background technique [0002] Transient ultra-broadband electromagnetic pulse is a strong electromagnetic radiation signal generated by a specific technology. It has the characteristics of short time domain and rich spectrum components. Its interference effect on radar, communication and navigation systems does not need to aim at the working frequency band of the system. [0003] Modern electronic receivers usually adopt a superheterodyne architecture. The bandwidth of the channel narrows step by step from radio frequency to signal processing. The transient ultra-wideband electromagnetic pulse signal also decreases with the bandwidth of the receiver. width. The energy in the effective passband of the receiver, as well as some mirror images, frequency mu...

AI Technical Summary

Problems solved by technology

Usually, the transient UWB electromagnetic pulse interference is characterized by non-stationary white noise, which directly affects the signal-to-noise ratio of the receiver

In addition, time-local high-amplitude interference may trigger the receiver's Auto Gain Control (AGC) logic, lower the channel's gain for useful signals, consume the dynamic range of the receiver, and affect the quality of the received signal

[0004] Although the interference efficiency of transient ultra-wideband electromagnetic pulse is low, the radiation power of the interference source is relatively large. If it is in the main radiation coverage area of ​​the interference source, the anti-interference effect is not good only relying on the band-pass selection characteristic of the receiver itself

Images