December 1968 | NTIA Technical Memo ERL TM WPL 3

Microwave Diversity over Irregular Terrain

R. E. McGavin; H. T. Dougherty; C. B. Emmanuel

Abstract: An experimental study of the effects of meteorological conditions and irregular terrain on the performance of an optimum diversity system showed that: (1) the refractive index departed appreciably from a linear profile and was not uniform along the propagation path; (2) several multi-path components were produced by the combination of irregular terrain and the non –linear refractifve index structure. These conditions violate the design assumptions so that the optimum space diversity system failed to provide the theoretical performance. This result would be expected for any of the existing diversity design procedures under these conditions, but preliminary analytical procedures indicate that a workable method can be developed.

Keywords: irregular terrain; diversity; microwave fading

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