Phase control reflector element

Details Phase control reflector element Phase control reflector element

H - Electricity

01

Q

351/19, 351/41

H01Q 3/36 (2006.01) H01Q 3/46 (2006.01) H01Q 9/44 (2006.01) H01Q 15/14 (2006.01) H01Q 15/22 (2006.01)

Patent

CA 1295417

ABSTRACT PHASE CONTROL REFLECTOR ELEMENT A microwave phase control reflector element comprises a planar dipole adjacent to a dielectric substrate. The phase of radiation reflected from the dipole is controlled by a variable impedance load connected between the two dipole limbs. The dielectric constant of the sub- strate material is such that the dipole couples only to radiation incident from the substrate side. The variable impedance is either comparable to the dipole impedance and reactive, or equivalent to an open or short circuit, to provide efficient reflection. A pair of crossed dipoles may be utilised to achieve independent control of both the phase and the polarisation of the reflected radiation. Many dipoles may be combined, using a common substrate, to provide a phased array. The dipoles may be used with a transmitter and arranged for phase modulation, beam direction control or duplex functions.

475099

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