Direction finding aerial system - has aerial elements on circle and signal connections over goniometric paths

摘要

The individual aerial elements of the direction finding aerial system are mounted on a periphery of a circle. Between the centre and the circumferential region of the circle extend several signal connections formed by directional goniometric paths. The latter are pref. operated with a frequency offset. On the path ends, facing the aerial elements are provided directional signal amplifiers for each path. The amplifiers have a high ohmic input forming a unit with an oscillator and a mixer. This arrangement replaces the conventional screened h.f. cables as the connecting elements, thus avoiding any detrimental reverse radiation. The amplifiers may comprise frequency converters and directional radiators for the cable-free connection to the centre. PS.