Limiter unit circuit and installation device, single-stage limiter circuit and limiter

Abstract

The invention relates to an amplitude limiting unit circuit, a single-stage amplitude limiting circuit, and an amplitude limiting device, wherein the amplitude limiting unit circuit, the single-stage amplitude limiting circuit and the amplitude limiting device improve the limiting power of a microwave mixed integrated PIN amplitude limiting device. A PIN amplitude limiting tube is connected in series in the amplitude limiting unit circuit, and is used in the single-stage amplitude limiting circuit and the amplitude limiting device, thereby improving the capability of the device for bearing power. Meanwhile, a series connection circuit reduces the grounding capacitance, so the working frequency and bandwidth of the circuit of the device can be improved.

Description

technical field [0001] The invention relates to the technical field of microwave limiters, in particular to a limiter unit circuit, a single-stage limiter circuit and a limiter for improving the power withstand of a microwave hybrid integrated PIN limiter. Background technique [0002] In wireless communication, a transmitter transmits radio signals and a receiver receives radio signals. Generally, the longer the communication distance, the greater the power of the transmitter, the better; while the front-end of the receiver requires higher sensitivity, the better, so the power that the front-end of the receiver can withstand is very small, in order to prevent possible high-power signals from entering the front-end of the receiver and burning Receiver, generally in the front-end circuit of the receiver, it is necessary to design a limiter to protect the small signal receiver circuit, especially in the radar receiver, the power leakage of the radar transmitter, the signal ref...

AI Technical Summary

Problems solved by technology

Microwave high-power signals are attenuated step by step when passing through the limiter, so the input power of the microwave limiter is mainly determined by the power characteristics of the first-stage PIN limiting diode. Generally, the withstand power of the PIN limiting diode The higher the power, the larger the junction capacitance of the diode, and the increase of the junction capacitance of the diode directly limits the operating frequency and operating bandwidth of the microwave limiter circuit

If the first-level limiting circuit uses multiple PIN limiting diodes in parallel to improve the limiter’s ability to withstand power, it is equivalent to increasing the ground capacitance of the first-level limiting circuit, which also limits microwave limiting. The operating frequency and operating bandwidth of the circuit

Images