Power sensors.

摘要

A microwave power sensor utilises a semiconductor power sensor element (4) which is mounted on a fin-line structure (3) within a waveguide channel. Inorder to check calibration of the sensor, a coaxial line (12) is used to feed a relatively low frequency reference signal to the power sensor. The power element is positioned between the input port of the waveguide and a coaxial line input port at which the reference signal is applied. The use of a precise and accurate reference signal enables the power sensor to be used for microwave measurements.