No abstract

This paper is aimed at developing a blind hole substrate slotted microstrip patch antenna for x-band applications. The proposed antenna has been designed using Roggers RT5880 (lossy) substrate of dielectric constant of 2.2 sandwiched between copper patch and ground plane. The propounded antenna has been devised and simulated in CST Microwave Studio 2014. This antenna resonates at frequency of 10.45 GHz with the minimal return loss of-55.30 dB, high gain of 8.02 dB and directivity of 8.50 dBi. The proposed antenna works for all frequencies from 8-12 GHz resulting in a huge bandwidth of 1.1 GHz (9.99 GHz-11.09 GHz). Bandwidth enhancement of 50 percent is observed in the proposed antenna as compared to the existing antenna. The proposed antenna provides this huge bandwidth with a compact size. The designed antenna can be suitably employed for all X-Band (8-12 GHz) applications including Radar and satellite communications, weather monitoring, military communications, satellite to earth downlink, earth to satellite uplink, radio determination and ultra-wide band applications.

Variety of materials with different dielectric constants are available for microstrip patch antenna. In the paper, graphene material is used and analyzed at X-band frequency. The use of graphene patch material as conducting substance for the antenna is assumed to improve the bandwidth and radiation efficiency on account of the outstanding functionalities and electromagnetic properties. The antenna is designed with Duroid RT5880 (lossy) material with a dielectric constant of 2.2 palced between graphene patch and ground plane using Computer Simulation Tool (CST) Microwave Studio 2016. The resonance frequency of the antenna is 10.54 GHz with a gain of 7.86dB, return loss of-24.55 dB, directivity of 8.31 dBi and VSWR of 1.1.2. The antenna operates for frequencies from 8-12 GHz with an enormous bandwidth of 1.09GHz.