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 S
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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.