Design of a high-speed anti blocking wideband receiver front-end

In electronic warfare, when the receiver receives the external strong electronic blocking signal, the output power of the internal amplifier of the receiver is too large or deep saturated, which results in the instantaneous blind area of the receiver. The traditional anti blocking method is to manually set the digital attenuator in the receiver, which makes the amplifier in the receiver work in the linear area. However, the response time is too long, and the receiver cannot work normally in this process. In this paper, a high-speed anti blocking wideband receiver front-end is introduced, which can automatically suppress the external strong blocking signal effectively, so as to protect the normal operation of the receiver. The high-speed anti blocking wideband receiver has the advantages of small front-end size, wide working frequency band, fast anti blocking response, which can be widely used in electronic countermeasures.