Investigation of a Compact ITC-2021 ADC Shape Slotted Patch Antenna with Return Loss Improvement For X-Band Military Applications

Microstrip antennas are vital components in the military X-Band (6.2:10.9) GHz systems to achieve high performance for these systems. In this paper hybrid shapes of slots are introduced as, International Telecommunication Conference 2021 Air Defense College (ITC-2021 ADC) shape slots in a reference patch antenna (RPA) using HFSS simulator for inter telecommunication military system applications. The proposed structures introduce a RPA without slots of $\text{RL} =- 19.1$ at 7.96 GHz and three varieties of shape slot in the RPA to improve the performance of antenna such as return loss (IRL). The three varieties are the ITC, the ITC-2021 and the ITC-2021 ADC shape slots which resulted in $\text{RL}=-24.48$, −29.76 and −25.66 at 7.97, 8.08 and 7.97 GHz respectively. The improved return loss ratio (IRLR) is the ratio of the RL between slotted patch and the RPA which indicates the decrease of S11 and hence improve the performance of antenna at the operating frequency (f). The three varieties introduce IRLR of 1.28, 4.12 and 2.03 at $\mathrm{f}=7.96,\ 8.08$ and 7.91 GHz for the different varieties respectively.