Reconfigurable microwave receiver front-end based on micro-electro-mechanical microwave power sensor

Abstract

The invention discloses a reconfigurable microwave receiver front-end based on a micro-electro-mechanical microwave power sensor, wherein the self detection function of an online-type MEMS (Micro Electro Mechanical System) microwave power sensor is adopted to convert microwave power, which is partially coupled by an MEMS membrane bridge, into direct current level, the direct current level applies online control to a preprocessor capable of attenuation and amplification so that the output of the front-end keeps stable when an MEMS microwave antenna receives too large or too small microwave signals, and simultaneously, the effect of protecting a low noise amplifier to prevent the low noise amplifier from overloading is achieved when the MEMS microwave antenna receives super large microwave signals suddenly; furthermore, a single microwave receiver front-end can work within a plurality of frequency bands through the MEMS microwave antenna and an MEMS adjustable wave filter, thereby the way that the traditional single microwave receiver front-end achieves the above function by a relatively complex AGC (Automatic Gain Control) module is replaced and the defect of single operating mode is overcome; and the front-end based on the MEMS technology has the characteristics of lower loss and small volume, etc.

Description

technical field [0001] The invention proposes a reconfigurable microwave receiver front end based on a micro-electro-mechanical microwave power sensor, which belongs to the technical field of micro-electro-mechanical systems (MEMS). Background technique [0002] Today, the requirements of low power consumption, miniaturization and light weight of wireless communication systems have prompted the integration of microwave receiver front-ends to a higher level. However, the traditional microwave receiver front-end has a single working mode in the wireless communication system, and its large volume, mass and power loss have become the main bottlenecks for system miniaturization and portability. Currently, reconfigurable networks are of great commercial and military value. It enables a single microwave receiver front-end to operate in multiple frequency bands, and greatly reduces the size of microwave receiver front-ends in multi-band applications. It mainly includes reconfigurab...

AI Technical Summary

Problems solved by technology

However, the microwave receiver front end using traditional AGC technology has many shortcomings, such as limited linear dynamic range, large loss, and the gain control is performed by the inner closed-loop negative feedback of the output signal of the circuit, and the outer closed-loop negative feedback uses To avoid signal overload, it is more complicated to implement

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