Adaptive antennas for u.h.f. broadcast reception

Adaptive arrays are aerial arrays which are able to adjust themselves automatically and electronically to meet particular constraints. The IBA´s steerable adaptive broadcast equipment (s.a.b.r.e.) is designed for the reception of u.h.f. television signals where the constraint is that of minimising the level of cochannel interference relative to the wanted signal. The paper describes the first practical implementation, which has been in operation in the Channel Islands since March 1977, and also considers the future applications of adaptive arrays.