A high power automatic protection circuit based on mems series switch

Abstract

The invention discloses a high-power automatic protection circuit based on a MEMS series switch, which includes a power divider, a rectifier, a voltage comparator, and a MEMS series switch. When the input power of the power input port of the power divider is less than or equal to a set safety threshold, and When the input voltage of the voltage comparator is less than or equal to the reference voltage, the voltage input from the voltage comparator to the MEMS series switch is at a low level, and the MEMS series switch is in a closed state; when the input power of the power divider power input port is greater than the set safety threshold, and When the input voltage of the voltage comparator is greater than the reference voltage, the voltage input from the voltage comparator to the MEMS series switch is at a high level, and the MEMS series switch is turned off. The invention can adaptively disconnect the signal path under the condition of high power input, even if the input signal power fluctuates, it can adaptively select the on or off state of the switch.

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 series switch. 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, by limiting the coupling of antennas or sen...

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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