Frequency dependent parametric radiation through a nonlinear fundamentally slow travelling wave structure
Frequency dependent parametric radiation through a nonlinear fundamentally slow travelling wave structure
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DOI：
10.1002/mop.32950
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发表时间：
2021-06
影响因子：
1.5
通讯作者：
Shuping Li;Minning Zhu;Yichao Yuan;C. Wu
中科院分区：
文献类型：
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作者：
Shuping Li;Minning Zhu;Yichao Yuan;C. Wu
本文提出了一种基于基本慢波传输线（TL）结构的具有频率相关参数辐射的非线性漏波天线（LWA）。与以激励频率辐射的常规LWA不同，所提出的行波结构的辐射依赖于基于注入的泵浦信号的参数频率。所提出的非线性基本慢波结构利用变容二极管作为非线性元件加载的周期性急剧弯曲TL。通过利用n =-1的空间谐波，基本慢波结构可以在更高的频率下进入漏波区域，其中参数辐射由注入的泵浦信号的分叉产生。这种基于TL的非线性LWA降低了设计复杂度和制造难度。由此产生的参数频率辐射可以用于波束转向，这提供了额外的设计自由度。
This article presents a nonlinear leaky wave antenna (LWA) with frequency dependent parametric radiation based on a fundamentally slow‐wave transmission line (TL) structure. Unlike a conventional LWA that radiates at the excitation frequency, the radiation for the proposed travelling wave structure relies on the parametric frequencies based on the injected pump signals. The proposed nonlinear fundamentally slow wave structure utilizes a periodic sharply bend TL loaded by varactor diodes as nonlinear elements. By utilizing the n = −1 spatial harmonic, the fundamentally slow wave structure can enter the leaky wave region at higher frequencies, where the parametric radiation results from the bifurcation of the injected pump signals. Such TL‐based nonlinear LWA reduces the design complexity and fabrication difficulty. The resulting parametric frequency radiation can be used for beam steering, which provides additional degree of design freedom.