Dielectric Cover Layer Thickness Effect on Circular Microstrip Antenna Parameters

This paper studies the effect of dielectric cover layer thickness on circular microstrip patch antenna parameters such as gain, bandwidth, beam-width, radiation patterns, return loss and VSWR. The proposed antenna is designed with 2.4GHz frequency in S-Band region. This operating frequency useful in ISM band applications. Circular patch antenna is designed with cavity model analysis and simulated using HFSS simulation software (Electromagnetic simulator). The coaxial probe fed is used for antenna design. In this paper the effect of dielectric cover layer on antenna parameters studied experimentally and comparing their performance characteristics. The simulation results shows that the antenna without dielectric cover layer obtained gain is 4.11dB and antenna with dielectric cover the gain is reduced to 2.87dB to 5.88dB based on thickness of the dielectric cover layer. The antenna bandwidth obtained without dielectric cover is 3% and with dielectric cover its bandwidth is reduced from 0.012GHz to 0.052GHz based on thickness of the cover layer effect. Similarly other parameters are investigated and compared. This proposed circular patch antenna is used in wireless and Wi-Fi applications.

DESIGN OF WEARABLE MULTIBAND CIRCULAR MICROSTRIP TEXTILE ANTENNA FOR WIFI/WIMAX COMMUNICATION

In proposed design the wearable circular microstrip antenna of radius of patch is 14 mm and the top of patch consist of two square slits of dimensions 5x5 mm2 and 10x10mm2 and the ground structure is made partial of 28mm x 86mm. Due to the properties of jeans fabric as low cost, flexible the antenna is made wearable. In the proposed study, circular microstrip textile based antenna has been designed for the ISM band of resonating frequency of 2.4GHz. The proposed structure provided the triple band as the radiating frequencies of 2.4GHz for WiFi, 6.4GHz for WiMAX and 12GHz for 5G communication applications. The simulated and fabricated results such as return loss, VSWR and gain - directivity etc. are analyzed and compared for the frequencies of 2.38GHz, 6.4GHz and 12GHz. In this proposed antenna, the bandwidths of antenna are obtained of the order 700MHz, 3.43GHz & 2.75GHz and gain of antenna are of the order 1.89 dBi, 3.98 dBi & 4.86 dBi.