Center feed single layer slotted waveguide array
Center feed single layer slotted waveguide array
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DOI：
10.1109/tap.2006.874310
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发表时间：
2006-05-01
影响因子：
5.7
通讯作者：
Ando, Makoto
中科院分区：
文献类型：
--
作者：
Park, Sehyun;Tsunemitsu, Yasuhiro;Ando, Makoto
为了提高单层缝隙波导阵的带宽和抑制频率相关的波束斜视，提出了一种中心馈电结构。为了减小辐射波导中的长线效应，在交替式馈电波导缝隙阵列的孔径中心安装了一个由交叉结组成的多路功率分配器。每个辐射槽都设有反射抵消感应壁，省去了抑制累积反射的光束倾斜技术，保证了瞄准光束。所有这些都装备在单层中，并有可能像通常的交替式相馈阵列那样进行低成本的大规模生产。该测试天线是在26 GHz频段为FWA系统制作的。在主光束保持在瞄准具上的情况下，获得了30.5dBI增益和46%的效率。采用遗传算法控制缝隙激励，在设计频率下，中心馈电孔径阻塞所产生的-9.5分贝旁瓣被抑制到-14.7分贝以下。
A center feed configuration is newly introduced to enhance the bandwidth as well as to suppress the frequency dependent beam squinting in single layer slotted waveguide arrays. A multiple-way power divider consisting of cross-junctions is installed at the center of the aperture in an alternating-phase fed waveguide slot array to reduce the long line effect in the radiating waveguide. Each radiating slot is equipped with an inductive wall for reflection canceling, which dispenses with the beam tilting technique for suppressing cumulative reflection and assures the boresight beam. All these are equipped in single layer and are potential for low cost mass-production as is usual the case with alternating phase-fed arrays. The test antenna is fabricated at 26 GHz band for FWA system. A 30.5 dBi gain with 46% efficiency with the main beam staying in the boresight is obtained. The sidelobes of -9.5 dB associated with the aperture blockage for the center feed is suppressed to below -14.7 dB at the design frequency, by applying a genetic algorithm for controlling the slot excitation.