Title: Design of inset fed circular dual band patch antenna for WLAN frequencies

Authors: Bagade Shilpa; L. Koteswara Rao; N. Arun Vignesh; Vadladi Vijaya Kumar

Addresses: Department of ECE, KLH, GRIET, Hyderabad, India ' Department of ECE, KLEF, HYD, Hyderabad, India ' Department of ECE, GRIET, Hyderabad, India ' Department of ECE, GRIET, Hyderabad, India

Abstract: A circular patch with internal feed and oblong slot on the radiation part for the dual-frequency operation is proposed. The antenna resonates at two frequencies i.e., 2.45 GHz and 5 GHz (ISM bands). These bands support WLAN with no extra cost of licensed band. The objective in using WLAN is that we can expect higher gain and ease of transmission. The advantage is it provides increased bandwidth about eight and less side lobe power than the rectangular type. The antenna can find its application in CR which efficiently uses bandwidth. The mode buoyed considering the ground plane, the dielectric material acts as a cavity which is of the circular type. The modes can be controlled by the means of radius. VSWR ratio is 2 for both bands. The design can be made to resonate in TM10 and TM11 and radiation characteristics with the plane unaffected. Good radiation characteristics can be achieved without affecting VSWR with impedance matching.

Keywords: circular antenna; inset feed; return loss; dual band; wireless local area network; WLAN.

DOI: 10.1504/IJSCC.2022.119719

International Journal of Systems, Control and Communications, 2022 Vol.13 No.1, pp.56 - 66

Received: 27 Sep 2020
Accepted: 30 Jan 2021
Published online: 16 Dec 2021 *

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