Design and Analysis of Butterfly-Shaped Feed Planar Wideband Monopole Antenna Using WIPL-D Simulator
Erfan Rohadi, Mochammad Firdaus Ali, Moechammad Sarosa, Indrazno Siradjuddin , Amalia, Awan Setyawan, Supriatna Adhisuwignjo

Electrical Engineering Departement, State Polytechnic of Malang

Abstract

A wideband monopole antenna is supplied with a perpendicular feed line, but the power does not spread evenly. In order to overcome the problem from the perpendicular feed line attached to the element, investigation of the antenna elements and the feed line is needed. The design of the feed line from planar antennas is to achieve excellent power spreading. The antenna performance on scattering parameters S11, gain, return loss, and VSWR are investigated at obtaining wideband antennas. The calculation of VSWR, gain, and return loss is presented using WIPL-D EM Simulator. This antenna works at frequency 4.0 GHz to 8.0 GHz with resonance frequency on 6.0 GHz. The antenna works best when the T-shaped radiator element dimension 7 mm x 6 mm and the distance between the ground plane and T-Shaped element x2=1.5 mm. The butterfly-shaped feed line increases the integral accuracy in power spreading. The result shows this design gain is -37 dB on frequency 6.01 GHz, the VSWR value is 1.01 and the bandwidth is 38%. The dimension and simple design for various applications such as GPS(Global Positioning System) are the main advantages of this antenna.

Keywords: Feed line, Low Profile Antenna, Planar Antenna, Wideband, WIPL-D

Topic: Electrical Engineering