Journal
IET MICROWAVES ANTENNAS & PROPAGATION
Volume 10, Issue 12, Pages 1292-1297Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-map.2016.0167
Keywords
broadband antennas; dielectric resonator antennas; microwave antennas; antenna radiation patterns; asymmetrical E-shaped dielectric resonator antenna; novel low profile dielectric resonator antenna; DRA; wideband radiator; impedance transformation; microstrip fed conformal strip; stable radiation pattern; frequency 6; 0 GHz to 10; 2 GHz
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A novel low profile dielectric resonator antenna (DRA) is presented in this study for broadband applications. An asymmetric E-shaped dielectric resonator is analysed and optimised numerically as a wideband radiator. The fundamental mode is excited along with three nearest higher modes inside the DRA. A detailed impedance transformation is discussed to merge these modes collectively resulting in a single wideband operation. A microstrip fed conformal strip is used to stimulate the DRA. The proposed DRA is fabricated and tested. For |S-11| -10 dB, the DRA offers a frequency band of 6.0-10.2 GHz with an impedance bandwidth of 52%. The measured and calculated results are compared and found in good match. The DRA's radiation characteristics are measured at different frequencies. A stable radiation pattern is observed throughout the band of operation. The measured gain of the wideband antenna is ranging from 4.5 to 8.1 dBi.
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