INJECTION-LOCKED 28-GHZ OSCILLATOR ARRAY WITH DISK-CYLINDER REFLECTOR

A 28-GHz endfire (modified Vivaldi) active antenna is described that c ontains a secondary, circularly polarized patch antenna for reception of an external injection-locking signal. Three of these devices are us ed to characterize an octagonal cylindrical reflector designed for cre ating an omni-directional transmitter suitable for use in point-to-mul tipoint communication systems, The experiments provide data that valid ates the approach used to simulate the azimuthal radiation patterns. T hese simulations are then extended to predict the patterns from a full eight-element array.