Microwave measuring equipment

Due to the large amount of work that has been undertaken in the fields of radar and communication engineering, particular emphasis has been laid upon the design and utilization of measuring instruments for the 10-cm and 3-cm bands that are suitable for field and factory as well as laboratory use. The concept of measurement in the band is considered, and the measurable quantities shown to be wavelength, power and normalized impedance. The following instruments are described: capacitance-loaded line and resonant cavity wavemeters; thermistor-type miffiwattmeter; a neon-tube tester for measurement of standing-wave ratio; directional couplers for s.w.r. measurement; spectrum analyser; noise generator. A 3-cm waveband radar test set incorporating signal generator, power monitor, spectrum analyser and cavity wavemeter is described.