V-slots Circular Microstrip Patch Antenna for triple band application

A circular microstrip patch antenna with radius 15mm had been designed to generate three resonating frequency bands with centre frequencies 2.129GHz, 2.6425GHz and 3.2205GHz respectively. Patch of the antenna had been slotted with three V-slots. Along with this, the patch and ground of the antenna had been shorted using metallic post of radius 0.63mm. Size and position of three V-slots and post position had been optimized to generate three resonating frequency bands for triple band application. Co-axial probe of inner conductor radius 0.63mm and outer conductor radius 1.45mm was used to excite the antenna. The said antenna had been investigated over 1-4GHz frequency range using HFSS version13 simulation software. Input impedance, Gain and radiation pattern of the antenna was evaluated over 1-4GHz frequency range.