Design and analysis of a novel tri-band flower-shaped planar antenna for GPS and WiMAX applications

Abstract

This paper presents the design of a tri-band flower-shaped planar monopole antenna operating at three frequencies i.e. 1.576 GHz (GPS), 2.668 GHz and 3.636 GHz (Mobile WiMAX). The radiating element of the antenna is backed by a 1.6 mm thicker FR-4 substrate having a dielectric constant of 4.3. The substrate is backed by a truncated ground plane. The antenna is fed through a 50 Ω microstrip line. The flower shape of the radiating element is derived from the basic circular shape by introducing in it rounded slots of various radii. The upper part of the antenna is flower-shaped while the lower part comprises a microstrip feed line and two branches, each having two 'leaves' at the end. The leaves and branches contribute in the impedance matching of the lower (1.576 GHz) and middle (2.668 GHz) frequency bands. The antenna gives an acceptable simulated efficiency >70% in the three frequency bands. Suitable gains of 1.63, 2.59 and 3.23dB are obtained at 1.576 GHz, 2.668 GHz and 3.636 GHz, respectively. The antenna matched with a VSWR<1.2 in the three frequency bands. The prototype of the antenna is fabricated and tested in the laboratory, and good agreement in simulated and measured results is achieved. The proposed design is a visually appealing and may find uses as an external antenna in GPS and WiMAX applications.

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Highly Compact GCPW-Fed Multi-Branch Structure Multi-Band Antenna for Wireless Applications

“…It offers high gain unidirectional radiation patterns in 4.6, 5.05, 5.8, and 6.3 GHz bands. Another narrow-band, flower-shaped multiband, monopole antenna is reported in [15]. e antenna has overall size of 56 × 59 × 1.6 mm 3 and resonates at 3.363 GHz, 2.668 GHz, and 1.576 GHz with gain of 3.23, 2.59, and 1.63 dBi, respectively.…”