Abstract Inspired by the theory of leaky wave antenna, a broadband and wide-angle frequency scanning antenna is proposed in this paper. My goal is to trade a narrow frequency band for a wide-angle beam scanning. Since the dispersion of spoof surface plasmon polariton (SSPP) mode slow-wave possesses larger gradient than that of the waves in the air, the metallic corrugated line (MCL) is adopted for energy transmission. To convert confined slow-wave into radiated fast-wave, a number of metallic patches are alternatively and periodically loaded besides the MCL and fed by electrically coupling. Owing to the frequency-dispersive phase difference between two patches, the resultant radiations are capable of beam scanning. As an example, the fabricated prototype operates in a relative bandwidth of 19.5 % (from 7.4 GHz to 9.0 GHz). Both the simulated and measured results have verified that the main beam of leaky-wave radiation can continuously scan from the backward direction to the forward direction with a scanning angular domain of 56° and an average gain level of 12.0 dB.

中文翻译：

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泄漏欺骗表面等离子体激元实现广角频率扫描天线

摘要 本文受漏波天线理论的启发，提出了一种宽带广角频率扫描天线。我的目标是用窄频带换取广角光束扫描。由于欺骗表面等离子体激元（SSPP）模式慢波的色散比空气中的波具有更大的梯度，因此采用金属波纹线（MCL）进行能量传输。为了将受限的慢波转换为辐射快波，除了 MCL 之外，还交替和周期性地加载许多金属贴片，并通过电耦合馈送。由于两个贴片之间的频率色散相位差，产生的辐射能够进行光束扫描。例如，制造的原型工作在 19.5% 的相对带宽（从 7.4 GHz 到 9.0 GHz）。