Open circuit protection circuit of solid-state power amplifier

Abstract

The invention discloses an open-circuit protection circuit of a solid-state power amplifier. The open-circuit protection circuit comprises a radio frequency link unit, a direct-current short-circuit antenna and a detection and control unit, the radio frequency link unit is electrically connected with the direct-current short-circuit antenna, and a connection line between the radio frequency link unit and the direct-current short-circuit antenna is externally connected with a detection and control unit; the detection and control unit comprises a high-frequency choke circuit, a pull-up circuit, a comparison circuit and an amplifier protection circuit; one end of the high-frequency choke circuit is respectively connected with the blocking capacitor and the direct-current short-circuit antenna, the other end of the high-frequency choke circuit is connected with the pull-up circuit, a connection point A in a connection line of the high-frequency choke circuit and the pull-up circuit is also connected with the comparison circuit, the comparison circuit is connected with the amplifier protection circuit, and the amplifier protection circuit is connected with the solid-state power amplifier. The problem of failure of the solid-state power amplifier caused by abnormal connection of an antenna, improper blind insertion and the like in array application of the solid-state power amplifier is solved.

Description

technical field [0001] The invention belongs to the protection field of power amplifiers, in particular to an open-circuit protection circuit of a solid-state power amplifier. Background technique [0002] The reliability of solid-state power amplifiers is closely related to the load characteristics. Under the condition of mismatch, the drain voltage of the solid-state power amplifier may exceed the acceptable range, resulting in breakdown failure of the amplifier, and may also increase the heat consumption of the amplifier, and the temperature is too high, resulting in reduced life of the amplifier or thermal burnout. [0003] The existing solutions mainly include power absorption and standing wave protection. [0004] Power absorption often uses isolators to dissipate the reflected power to the load. Due to the limitation of the bandwidth of the isolator, this method cannot be realized in many broadband applications. [0005] Standing wave protection usually uses a direc...

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to provide an open circuit protection circuit for a solid-state power amplifier in order to overcome the defects of the prior art, which solves the problems of the solid-state power amplifier in the array application due to the abnormal connection of the antenna and the failure of blind insertion through a simple and low-cost solution. The problem of power amplifier failure caused by common abnormalities such as in place

Images