A novel leaky wave endfire filtering antenna based on spoof surface plasmon polaritons (SSPPs) is proposed. The structure of leaky wave antenna consists of multiple radiating elements and one double-sided parallel strip line (DSPSL), and the filtering performance is realized by adding stubs with via holes. The structure with a periodic arrangement of the radiating elements has similar dispersion curves of SSPPs, which has low-pass transmission characteristic and also can radiate energy to the free space. According to the measured results, a peak gain of 8.65 dBi at a center frequency of 7.7 GHz and a bandwidth of 36.36% can be achieved for the leaky wave endfire filtering antenna based on SSPPs. The out-of-band rejection is over 13 dB.

中文翻译：

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一种新型的基于表面等离子体激元的新型漏波端火滤波天线

提出了一种基于欺骗表面等离子体激元（SSPP）的新型漏波端射滤波天线。漏波天线的结构由多个辐射元件和一条双面平行带状线（DSPSL）组成，通过增加带通孔的短截线来实现滤波性能。辐射单元周期性排列的结构具有类似SSPPs的色散曲线，具有低通传输特性，也可以向自由空间辐射能量。根据实测结果，基于SSPP的漏波端射滤波天线在7.7 GHz中心频率处的峰值增益为8.65 dBi，带宽为36.36%。带外抑制超过 13 dB。