paper 150104160429

Abstract

This paper presents improved aperture coupled microstrip antenna with three resonants which its bandwidth has been enhanced due to vary the current distributions. There is a compromise between radiation characteristics and the bandwidth. Radiation patterns indicate the appropriate propagation pattern of antenna is between 1.3 GHz to 2.3 GHz frequency band which clarifies a bandwidth more than 53%. There is bandwidth enhancement up to this limit by utilization of multiple radiating elements. The antenna operates in both linear and circular polarization (1.64 GHz to 1.76 GHz for less than 3 dB Axial Ratio). The simulated results done by two methods, i.e., Finite Element Method (FEM) and Finite Difference Time Domain (FDTD) collaborated by two full-wave softwares ANSYS HFSS and CST MWS have good agreements with the measurement ones.

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Esfandiar Mehrshahi

Hadi Ghobadi

Mohsen Jafari Chashmi

Mahdi Oliaei

Ramezan Ali Sadeghzadeh