volume | PIER Journals

Abstract

In this article, a novel ovate-shaped microstrip antenna (OMSA) is presented for application in wireless communication. It covers the evolution of a new shape and delves deeper into the resonance mechanism of the proposed design using characteristic mode analysis (CMA). The OMSA resonates at 2.45 GHz and 2.69 GHz with return loss of -18.82 dB and -31.84 dB, respectively. It offers a ultra-wideband performance with 91.46% measured bandwidth. The characteristic impedance and VSWR at 2.4 GHz are 49 Ω and 1.3, respectively. By introducing performance enhancement techniques such as ground truncation and a notch in the patch, the antenna resonance characteristics have been enhanced. A prototype of the proposed OMSA has been fabricated and validated experimentally. The time domain characteristics of the proposed OMSA have been simulated for both face-to-face (FtF) and side-by-side (SbS) configurations. The FtF configuration offers better performance, showcasing group delay of the OMSA < 2 ns and minimal variation along the operating band. The phase linearity is also maintained minimizing any distortions. The time domain results demonstrate a maximum fidelity factor of 90.62%, reaffirming the suitability of the antenna for wireless communication. The suitability of the proposed OMSA for wireless applications is also validated experimentally by analyzing group delay and S₂₁ phase linearity of the received signal.

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Dr. Elisha Chand

Professor Sellakkutti Suganthi