Antenna having electrically positionable phase center

Details Antenna having electrically positionable phase center Antenna having electrically positionable phase center

H - Electricity

01

Q

351/21

H01Q 3/36 (2006.01)

Patent

CA 1198513

Abstract of the Disclosure An antenna (50) is disclosed herein whose phase center may be electrically moved relative to a main receiving/radiating element. The main receiving element (56) is located in a cavity (54) in a ground plane (52). Spaced around the main receiving element are a number of paracletic elements (58, 60, 62, 64), each of which has at least two switchable reactance states. In one state, there is little coupling between the paracletic element and the main receiving element. In another state, coupling is increased so that the phase center of the antenna shifts towards the paracletic element. A squencer (100) supplies bias voltages to switching diodes (84, 86) to control the reactance states of the paracletic elements and thus the position of the phase center of the antenna. The antenna may be used as a tracking feed (14) for a directional lens or reflector system (12).

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