High power automatic protection circuit based on mems microcantilever beam and graphene cpw transmission line

Abstract

The invention discloses a high-power automatic protection circuit based on a MEMS micro-cantilever beam and a graphene CPW transmission line. The graphene layer is arranged between the CPW central signal line and the ground line, and the MEMS micro-cantilever beam couples part of the signals on the transmission line. A control signal is generated according to the magnitude of the coupling power, and the control signal is loaded on the graphene layer. According to the electrical regulation characteristics of graphene, the control signal can change the chemical potential and conductivity of the graphene layer, and then change the transmission characteristics of the CPW transmission line. When the input power is less than the safety threshold, the chemical potential of graphene is zero, the conductivity is very small, the signal can be transmitted normally, and the transmission loss is small; when the input power exceeds the safety threshold, the control signal increases, and the graphene chemical potential and conductance The rate increases, which in turn changes the transmission characteristics of the CPW transmission line, and the output signal is greatly attenuated, which automatically protects the subsequent circuit. The invention has the advantages of small transmission loss in low power state, difficult breakdown in high power state, high reliability, and self-adaptive protection according to the magnitude of input power.

Description

technical field [0001] The invention belongs to the field of microelectronics, in particular to a high-power automatic protection circuit based on a MEMS micro-cantilever beam and a graphene CPW transmission line. Background technique [0002] The electromagnetic pulse energy emitted by the microwave transmitter will enter the system through the receiving equipment such as the antenna on the electronic system, resulting in serious interference, disturbance or even damage, especially the electromagnetic pulse coupled into the radio frequency channel through the antenna will destroy the sensitive device. Therefore, it is very important to set a high-power protection circuit at the back end of the receiving antenna to suppress the electromagnetic pulse voltage or current entering the electronic system and protect the sensitive modules in the circuit from damage. At present, the main method used for high-power protection is microwave solid-state reinforcement technology, that is...

AI Technical Summary

Problems solved by technology

This microwave solid-state reinforcement technology has disadvantages such as large insertion loss, easy breakdown under high power conditions, and inability to perform adaptive protection according to the input power.

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