The invention discloses a test
system and method suitable for high stability
radio frequency signal power stability. The
system includes a directional coupler, an attenuator group, a
microwave power meter, a host computer, a high-precision digital
multimeter and a
diode detector. The directional coupler is connected in series with the attenuator group and the
microwave power meter in turn, and the host computer performs
system application measurement and control on the
microwave power meter and the high-precision digital
multimeter respectively through the
program control bus, and the
coupling end of the directional coupler is connected with the
diode detector , the
diode detector is connected with a high-precision digital
multimeter, and the diode detector is a
gallium arsenide diode detector. The beneficial effects of the present invention are: the present invention realizes the test and evaluation target of
radio frequency signal power stability obtained synchronously without
distortion through the test of the detection
voltage stability, and the design of the constant temperature cavity and the
gallium arsenide device makes the power of the input
radio frequency signal constant In some cases, the detection
voltage is affected by temperature changes to a minimum.