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Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
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RECONFIGURABLE SIW ANTENNA BASED ON RF-MEMS SWITCHES

By B. Khalichi, S. Nikmehr, and A. Pourziad

Full Article PDF (1,392 KB)

Abstract:
In this article, a novel compact reconfigurable antenna based on substrate integrated waveguide (SIW) technology is introduced. The geometry of the proposed antennas is symmetric with respect to the horizontal center line. The electrical shape of the antenna is composed of double H-plane SIW based horn antennas and radio frequency micro electro mechanical system (RF-MEMS) actuators. The RF-MEMS actuators are integrated in the planar structure of the antenna for reconfiguring the radiation pattern by adding nulls to the pattern. The proper activation/deactivation of the switches alters the modes distributed in the structure and changes the radiation pattern. When different combinations of switches are on or off, the radiation patterns have 2, 4, 6, 8,... nulls with nearly similar operating frequencies. The attained peak gain of the proposed antenna is higher than 5 dB at any point on the far field radiation pattern except at the null positions. The design procedure and closed form formulation are provided for analytical determination of the antenna parameters. Moreover, the designed antenna with an overall dimensions of only 63:6 ×50 mm2 is fabricated and excited through standard SMA connector and compared with the simulated results. The measured results show that the antenna can clearly alters its beams using the switching components. The proposed antenna retains advantages of low cost, low cross-polarized radiation, and easy integration configuration.

Citation:
B. Khalichi, S. Nikmehr, and A. Pourziad, "Reconfigurable SIW Antenna Based on RF-MEMS Switches," Progress In Electromagnetics Research, Vol. 142, 189-205, 2013.
doi:10.2528/PIER13070204
http://www.jpier.org/PIER/pier.php?paper=13070204

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