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Submillimeter Wave Propagation Measurement Techniques

Exploration and utilization of a new part of the electromagnetic spectrum requires knowledge of the propagation characteristics of that re - gion. Theoretical studies are necessary to predict what is to be expected; however, experimental propagation measurements are needed to verify the validity of the theoretical studies. Experimental measurements require that adequate apparatus for the region under study be available. While fully adequate apparatus is desirable, frequently valuable (although limited) data can be obtained from very rudimentary apparatus. Many years before the microwave region achieved adequate apparatus, Hertz through his classical experiments in 1889 generated 60 centimeter waves using a spark gap transmitter.