A modified planar triangular monopole antenna for wide band applications

Abstract

A Modified Planar Triangular Monopole Antenna (MPTMA) for wide band operation is presented. Broadband antennas are preferred for point to point communication, microwave imaging and microwave tissue heating such as hyperthermia treatment of cancerous tissues. The proposed antenna is developed from a narrow band triangular monopole antenna which is similar to an antenna which is known as “Tab monopole antenna”, and its bandwidth is increased from ∼ 550 MHz (1.75GHz to 2.3GHz) up to 6GHz (1.9GHz to 7.9GHz), for return loss better than 10dB, by defecting the ground plane. For return loss better than 7dB, an impedance bandwidth of 6.8GHz showing bandwidth ratio of >4:1 is measured. All of the simulation results are obtained using ANSYS's High Frequency Structure Simulator (HFSS 13.0) which is based on Finite Element Method (FEM). Proposed antenna is fabricated on FR4 Epoxy substrate and measured results are found to be in good agreement with that of simulated results.