周期结构正交模态的研究及其在同一频带内两束独立转向中的应用

IF 3.6 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Yunhao Fu;King Yuk Chan;Rodica Ramer
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引用次数: 0

摘要

本文研究了介电填充矩形波导漏波结构中的正交模及其空间谐波。周期结构中正交模态色散分析的目的是确定两个独立光束在不同空间区域转向的可行性。布里渊图解释了构造漏波结构的基本原理;提出了一种用于模态激励的馈电网络。所提出的双端口原型利用标准印刷电路板(PCB)和3D打印技术,色散特性显示了测量和模拟之间的一致性。从19.6 GHz到22.2 GHz,测量结果显示每个端口激励都有两个独立的光束。一个激励端口引导光束在前象限,从+35°到+65°,而另一个端口激励导致第二束在后象限,从- 66°到- 35°。由于这两个波束是由不同端口独立激发的正交模式产生的,两个输入端口之间测量到的- 20 dB的带内隔离证实了这两个波束可以在同一频段内单独驱动。此外,两束在频率扫描时,在不同的空间象限内保持线偏振一致性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigation of Orthogonal Modes in a Periodic Structure and Application to Two-Separate Beams Steering Within the Same Frequency Band
This paper investigates orthogonal modes and their space harmonics in a dielectric-filled rectangular waveguide (RWG) leaky-wave structure. The dispersion analysis on orthogonal modes in periodic structures aims to determine the feasibility of two individual beams steering in different spatial regions. The Brillouin diagrams explain the basic principles of the constructed leaky-wave structure; a feeding network is developed for mode excitation. The proposed two-port prototype utilizes standard printed circuit board (PCB) and 3D printing techniques, and the dispersion properties reveal an agreement between measurements and simulations. From 19.6 to 22.2 GHz, the measurements showcase two separate beams steered for each port excitation. One excited port steers a beam in the forward quadrant, from +35° to +65°, while the other port excitation results in the second beam steered in the backward quadrant, from −66° to −35°. Since these two beams are produced by orthogonal modes that are independently excited from different ports, the measured in-band isolation of −20 dB between two input ports confirms that the two beams can be separately driven within the same frequency band. In addition, the two beams maintain linear polarization consistency in different spatial quadrants while scanning with frequency.
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来源期刊
CiteScore
6.50
自引率
12.50%
发文量
90
审稿时长
8 weeks
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