Abstract
In this article, a new radiating stub microstrip feed has been investigated with asymmetrical ground plane for generation of circular polarization (CP) in a dielectric resonator antenna (DRA). Here, asymmetrical ground plane and 3 radiating stubs with microstrip feed line are used for generation of 2 different modes namely TE11δ and TE12δ in rectangular DRA. By using mode matching concepts, these modes are responsible for enhancing the impedance bandwidth (TE12δ ie, and ) and axial ratio (AR) bandwidth (TE11δ ie, and ) in proposed antenna. Designed antenna offers measured input impedance bandwidth (|S11| < −10 dB) and AR bandwidth (AR < 3-dB) of 44.78%, ranging from 4.6 to 6.9 GHz and 23.32%, ranging from 4.6 to 6.9 GHz, respectively. It has been observed that proposed antenna shows left-handed CP fields in boresight direction with average gain of 3.15 dBic and radiation efficiency of 90.54%. Designed antenna is suitable for Wi-MAX (3.3-3.7 GHz) applications.
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