The terahertz (THz) band contributes significantly to high-speed data rates in short-distance communication. This article proposes a unique design of the trigonal microstrip patch antenna on photonic crystal (PhC) substrate in THz communication. The PhC design structure employs unique air-hole shapes such as L, H, T, I and upturned L instead of regular periodic latitude holes. The proposed antenna substrate uses Rogers RO4350 material, which helps to attain high gain and almost negligible return loss at THz frequency. The antenna performance is investigated with different PhC air-hole shapes. The I-shaped air-hole PhC antenna offered a meager return loss of − 58.99 dB with a high gain of 9.1 dB and directivity of 10.7 dBi. The CST studio tool helps to simulate the parametric analysis of the proposed antenna design. This compact PhC antenna structure is apt for wireless communication, particularly in THz applications.

太赫兹 (THz) 频段对短距离通信中的高速数据速率有重要贡献。本文提出了一种在太赫兹通信中采用光子晶体 (PhC) 衬底的三角微带贴片天线的独特设计。PhC 设计结构采用独特的气孔形状，如 L、H、T、I 和上翘的 L，而不是规则的周期性纬度孔。提议的天线基板使用 Rogers RO4350 材料，这有助于在太赫兹频率下获得高增益和几乎可以忽略的回波损耗。使用不同的 PhC 气孔形状研究天线性能。I 形气孔 PhC 天线的回波损耗仅为 − 58.99 dB，具有 9.1 dB 的高增益和 10.7 dBi 的方向性。CST studio 工具有助于模拟建议天线设计的参数分析。