Design and Performance Analysis of a Novel High Gain and Compact Planar Patch Antenna for RFID Reader Application

A novel realisation of high gain and compact slotted planar patch antenna for the radio frequency identification (RFID) application is presented here. The antenna was printed on a dielectric Flame Retardant FR-4 Epoxy substrate of dielectric constant (εr=4.3). Simulated results obtained for this antenna exhibits resonant frequency of 5.8 GHz, better return loss of -36.91 dB, high gain of 8.308 dBi, consistent omnidirectional radiation pattern and 43 MHz impedance bandwidth within the RFID frequency range. Further parametric analysis of dimension of slots and feed line was done to acquire the required reflection coefficient, gain and 50Ω impedance of feed line. The simulation tool ZELAND IE3D version 15.20, which is based on method of moment was used to analyze and optimize the proposed antenna.