BALANCED MICROWAVE AMPLIFIER Russian patent published in 2014 - IPC H03F1/52 H03H7/48 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to radio engineering and can be used as a receiving amplifier of active phased antenna arrays with a built-in test and calibration system, where high sensitivity is required. The balanced microwave amplifier comprises two amplifiers having identical parameters, connected between cascade-connected input and output 3 dB directional couplers; the ballast circuit of the input 3 dB directional coupler comprises a unit for inputting a calibration signal, and each output arm of the output 3 dB directional coupler can be connected through a controlled switch to either the output of the balanced microwave amplifier or to a matched ballast load, wherein the amplifiers with identical parameters have reflection-type power limiters at their inputs.

EFFECT: broader functional capabilities by limiting power of the input signal and switching the input signal to a calibration signal without deterioration of input signal sensitivity.

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