表面开槽的宽带遥测微带天线设计

微带天线由于体积小、易共形、适用于金属环境等优点而被广泛地应用于旋转件遥测系统中。针对传统微带遥测天线带宽较窄的问题，本文提出了一种通过在天线贴片和地板上开槽来扩展带宽的设计方法，并进行了仿真和测试验证，二者结果吻合良好。高频电磁结构仿真软件HFSS的仿真结果表明，通过在适当位置开槽，可使得天线的相对阻抗带宽(S11<-10dB)达到5.6%(2.409~2.545GHz)，基本覆盖ISM频段，最高增益可达4dBi。测试结果表明其相对阻抗带宽为6%(2.41~2.56GHz)，在收发天线间距10毫米的情况下，传输系数S21达到-22dB，可以满足遥测系统的需求。

Design of broadband telemetry slotted-microstrip antenna

Microstrip antenna is widely used in telemetry system due to its small size, easy conformal and suitable for metal environment. Aiming at the narrow bandwidth of traditional microstrip telemetry antenna, a design to expand bandwidth by slotting on antenna patch and floor is proposed, simulation and test verification are carried out and their results are consistent with each other. The HFSS simulation results show that the relative impedance bandwidth(S11<-10dB) of the antenna is 5.6%(2.409~2.545GHz) which basically covers the ISM frequency band by slotting at appropriate positions and the highest gain can reach 4 dBi. Test results show that its relative impedance bandwidth is 6%(2.41~2.56GHz) and the transmission coefficient of S21 is about -22 dB when the distance between two antennas is kept at 10 mm, which meets the requirements of the telemetry system.