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

作者：Ullah Sadiq^*; Faisal Farooq; Ahmad Ashfaq; Ali Usman; Tahir Farooq Ahmad; Flint James A

来源：Journal of Electromagnetic Waves and Applications, 2017, 31(9): 927-940.

DOI：10.1080/09205071.2017.1330160

• Tri-band
• monopole
• GPS
• WiMAX

This paper presents the design of a tri-band flower-shaped planar monopole antenna operating at three frequencies i.e. 1.576 (GPS), 2.668, and 3.636GHz (Mobile WiMAX). The radiating element of the antenna is backed by a 1.6mm 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 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 (1.576GHz) and middle (2.668GHz) 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, 2.668, and 3.636GHz, 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.

• 出版日期2017