A circularly polarized (CP) meander loop antenna used in the unmanned aerial vehicle (UAV) satellite navigation system is proposed. The planer size of the proposed antenna is 45.6 × 38.4 mm2 and it was printed on a thin flexible substrate with a thickness of only 0.063 mm. Thus, it has the advantages of a lightweight, low profile, and ease in manufacturing. The proposed antenna design utilizes a loop antenna and has applied a perturbed element into the loop to excite two equal amplitude electric fields with a 90° phase difference, thereby exciting a good CP radiation. The measured 10‐dB impedance bandwidth of the proposed antenna was 9.3 (1.48–1.624 GHz), and its corresponding 3‐dB axial ratio (AR) bandwidth was 2.3 (1.555–1.591 GHz). The CP operating band of the proposed antenna can cover the GPS L1, Galileo E1, and Beidou B1 band (1.559–1.591 GHz).
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机译：该文提出一种用于无人机（UAV）卫星导航系统的圆极化（CP）蜿蜒环形天线。所提出的天线的刨床尺寸为 45.6 × 38.4 mm2，印刷在厚度仅为 0.063 mm 的薄柔性基板上。因此，它具有重量轻、外形小巧、易于制造等优点。所提出的天线设计利用环形天线，并在环路中施加扰动元件，以激发两个相位差为90°的相等幅度电场，从而激发良好的CP辐射。所建天线测得的 10 dB 阻抗带宽为 9.3% （1.48–1.624 GHz），其相应的 3 dB 轴比 （AR） 带宽为 2.3% （1.555–1.591 GHz）。所提天线的CP工作频段可以覆盖GPS L1、Galileo E1和北斗B1频段（1.559–1.591 GHz）。
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