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2017-02-27
A Novel Cavity Backed Monopole Antenna with UWB Unidirectional Radiation
By
Progress In Electromagnetics Research C, Vol. 72, 1-13, 2017
Abstract
A novel compact unidirectional UWB antenna is presented in this paper. First a novel planar omnidirectional UWB antenna with CPW-feed is designed. The antenna is composed of a half-elliptical disc with a small ground plane. A slot is inserted on the patch as a novel technique to improve the gain bandwidth of the antenna at higher frequencies is presented. The omnidirectional antenna shows UWB matching and gain bandwidth of 2 GHz to 6.5 GHz. Furthermore, to make the radiation pattern of the omnidirectional antenna unidirectional, a rectangular shape metallic reflector without bottom wall is used on the backside of the antenna. The unidirectional antenna with a total dimension of 0.52λm x 0.33λm x 0.18λmm wavelength of the minimum operating frequency) has a matching bandwidth of 1.5 GHz to 7.7 GHz with a gain of 5 dBi to 10.2 dBi over 1.7 GHz to 6.5 GHz, and flat group delays of less than 1 nsec. To validate the proposed design, the antenna is fabricated, and measured results are compared with simulations.
Citation
Arezou Edalati, Wenyi Shao, Todd McCollough, and William McCollough, "A Novel Cavity Backed Monopole Antenna with UWB Unidirectional Radiation," Progress In Electromagnetics Research C, Vol. 72, 1-13, 2017.
doi:10.2528/PIERC16121610
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