Aperiodic array antenna

Communications: radio wave antennas – Antennas – With radio cabinet

Reexamination Certificate

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C343S815000

Reexamination Certificate

active

06888504

ABSTRACT:
An antenna array that uses at least two passive antennas and one active antenna disposed above a ground plane, but electrically isolated from the ground plane, and a respective resonant strip positioned beneath each passive antenna. The passive antenna elements are positioned about the active element, and each of the at least two passive antenna elements is individually set to a reflective or a transmissive mode to change the characteristics of an input/output beam pattern of the antenna apparatus.

REFERENCES:
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Ohira and Gyoda, “Electronically Steerable Passive Array Radiator Antennas for Low-Cost Analog Adaptive Beamforming,”0-7803-6345-0/00, 2000 IEEE.
Scott, et al., “Diversity Gain from a Single-Port Adaptive Antenna Using Switched Parasitic Elements Illustrated with a Wire and Monopole Prototype,” IEEE Transactions on Antennas and Propagation, vol. 47, No. 6, Jun. 1999.
King, Ronold W.P.,The Theory of Linear Antennas, pp. 635-637, Harvard University Press, Cambridge, Mass., 1956.

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