INJECTION-LOCKED QUASICIRCULATOR-BASED STEERABLE REPEATER ARRAY

In this article a quasicirculator is combined with an injection-locked VCO in order to build an analogue phase-shifter unit. The novel phase shifter requires only a dc tuning signal to be applied to the VCO in order to achieve phase encoding. The intrinsic performance of the circ uit and its method of operation are described. In addition, the applic ation of the quasi-circulator injection-locked phase shifter as the co ntrol element in a simple repeater array is demonstrated in terms of i ts beam steering potential. (C) 1997 John Wiley & Sons Inc.