In this article a circularly polarized (CP) leaky‐wave antenna (LWA) based on spoof surface plasmon (SSP) is proposed. Corrugated circular patches are loaded on either side of the SSP waveguide periodically and asymmetrically, which enables continuous CP beam steering from backward to forward quadrant eliminating “the open stopband” at broadside. The antenna exhibits an impedance bandwidth of 43.5% (<−10 dB) and a 3‐dB axial‐ratio bandwidth of 27.8%; within the impedance bandwidth from 4.5 to 7 GHz the radiation beam can be steered from 120° to 70°. With a ground plane placed underneath, the antenna can achieve average radiation gain and efficiency of about 10 dBic and 84.2%, respectively, showing a radiation gain increase of about 3 dB over that without a ground plane. The proposed SSP‐based CP LWA is expected to find applications in wireless communication systems based on planar antennas.

中文翻译：

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圆形极化的欺骗性表面等离子体激元泄漏波天线

本文提出了一种基于欺骗表面等离子体激元（SSP）的圆极化（CP）漏波天线（LWA）。波纹状圆形斑块周期性且非对称地加载在SSP波导的两侧，这使得连续CP光束可以从后向象限转向前象限，从而消除了宽边的“开放阻带”。天线的阻抗带宽为43.5％（<-10 dB），轴向比率3dB为27.8％。在4.5至7 GHz的阻抗带宽内，辐射束可以从120°转向70°。将接地平面置于其下方，该天线可分别实现约10 dBic和84.2％的平均辐射增益和效率，与没有接地平面的情况相比，其辐射增益增加约3 dB。