Design and analysis of multilayer triangular microstrip patch antenna with FSS screen

This paper presents design of truncated equilateral triangular microstrip antenna designed for circular polarization. The antennas are labeled as (a) Antenna Type1; truncated tip triangular patch antenna with parasitic element and air gap and (b) Antenna Type2; truncated tip triangular patch antenna with parasitic element, air gap and FSS screen. The simulated impedance bandwidth of the antenna type1 is about 287.8MHz from 3.52 to 3.81GHz; the 3dB axial ratio (simulated) bandwidth is about 56.6MHz from 3.63 to 3.69GHz. Furthermore, a frequency selective surface (FSS) is used in antenna type2, the impedance bandwidth can be further increased to 289MHz (3.53GHz-3.82GHz), and the 3-dB AR-bandwidth is greatly enhanced from 56.6 to 169.1MHz.