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A microstrip patch phased array antenna with parasitic elements and reactance-tuned coupling

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2 Author(s)
Luther, J.J. ; Dept. of Electr. Eng. & Comput. Sci., Univ. of Central Florida, Orlando, FL, USA ; Xun Gong

A new approach to parasitic phased array antennas is presented. A symmetric two-layer, single input inexpensive three-element array at 1 GHz employing varactors as tuning mechanisms is designed, fabricated and measured. The driven element is mutually coupled to two parasitic elements in the H-plane, and the mutual coupling is tuned by open-circuited microstrip stubs on the feed layer. The varactors are used to break the symmetry of the structure, resulting in beam scanning, and to maintain resonance at 1 GHz. A symmetric scanning range of -20 to +20° is measured with maintained impedance matching and radiation pattern integrity. The low cost of this array is advantageous to applications in point-to-point communication systems, weather and target tracking radar systems.

Published in:

Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on

Date of Conference:

3-8 July 2011