volume | PIER Journals

2012-02-12

A Dual Band Frequency and Pattern Reconfigurable Dielectric Resonator Antenna

Gulam Nabi Alsath Mohammed,

Mr. Gulam Nabi Alsath Mohammed

Department of ECE, CEG Campus

Anna University

India

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Sridhar Bilvam,

Dr. Sridhar Bilvam

Department of ECE, CEG Campus

Anna University

India

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Kanagasabai Malathi,

Prof. Kanagasabai Malathi

Department of Electronics and Communication Engineering, CEG Campus

Anna University

India

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R. Rajesh Kumar,

Mr. R. Rajesh Kumar

Department of ECE, CEG Campus

Anna University

India

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N. Karthik,

Dr. N. Karthik

Department of ECE, CEG Campus

Anna University

India

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Henridass Arun

Mr. Henridass Arun

Department of ECE, CEG Campus

Anna University

India

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Progress In Electromagnetics Research C, Vol. 27, 115-128, 2012

doi:10.2528/PIERC11121406

Abstract

A new approach to obtain frequency and pattern reconfiguration in Dielectric Resonator Antenna (DRA) has been proposed. The design consists of two identical aperture coupled DRAs separated by a distance of λ₀. A switchable feed based frequency reconfiguration is discussed in which the feed acts as an ideal switch. This design operates at two frequencies viz., 3.6 GHz and 5.2 GHz. These frequencies are independently tuned using trimmers. Further, the slot length of both the DRAs can be tuned independently using movable shorting pins driven by miniature motors. The shorting pins form a part of the ground plane. By varying the slot length of the DRA, the resonant frequency is controlled which in turn helps in gaining pattern reconfiguration. The structure has been designed for lower and middle band frequencies of WLAN, operating between 5.15-5.25 GHz and 5.25-5.35 GHz, respectively. These types of antennas can be employed in MIMO systems for increasing the capacity through Pattern diversity.

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Gulam Nabi Alsath Mohammed, Sridhar Bilvam, Kanagasabai Malathi, R. Rajesh Kumar, N. Karthik, and Henridass Arun, "A Dual Band Frequency and Pattern Reconfigurable Dielectric Resonator Antenna," Progress In Electromagnetics Research C, Vol. 27, 115-128, 2012.
doi:10.2528/PIERC11121406

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