Microwave Measurements

There are presented briefly the measurement techniques that are most closely associated with microwaves (the frequency range of 0.3 to 300 Gc or the wavelength range of 1 meter to 1 mm). After a logical classification of such measurements in confined space (such as waveguides) the subject is introduced by a review of the principles peculiar to microwaves. Typical of this frequency range is the standing-wave technique and the reflection chart, utilized for evaluating and presenting the "normalized" value of any impedance relative to the wave impedance in a waveguide. More conventional methods are employed for evaluating transmission properties (attenuation and phase shift) by comparison with primary or secondary standards. Various special methods are discussed, including some of those most in need of further development in the future.