Numerical and Experimental Verification of a 3D Quasi-Optical System
Numerical and Experimental Verification of a 3D Quasi-Optical System
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3D 准光学系统的数值和实验验证
DOI：
10.1155/2015/595023
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发表时间：
2015
影响因子：
1.5
通讯作者：
Yu Junsheng
中科院分区：
文献类型：
--
作者：
Lu Zejian;Liu Xiaoming;Wang Hai;Chen Xiaodong;Yao Yuan;Yu Junsheng
提出了一种基于框架的Gabor变换、高斯光束反射和三维高斯光束衍射技术的模块化、高效的高斯光束分析方法，用于分析准光系统中的反射镜和频率选择表面。为了验证这种分析方法，3D双通道QO系统工作在183和325 GHz的设计和测试。所提出的QO系统采用两层结构，其中穿孔六边形阵列的FSS在顶层传输325 GHz信号，而将183 GHz信号转移到底层。系统的测量结果表明，在远场模式下，两个通道的信号电平都可以达到-30 dB的一致性。在主波束区（2.5倍-3 dB波束宽度），计算值与实测值的偏差在2 dB以内，验证了该方法的有效性和准确性。
A modular and efficient Gaussian beam (GB) analysis method, incorporating frame-based Gabor transformation, GB reflection, and a 3D GB diffraction technique, was developed to analyze both the reflectors and frequency selective surface (FSS) in quasi-optical (QO) system. To validate this analysis method, a 3D dual-channel QO system operating at 183 and 325 GHz was designed and tested. The proposed QO system employs two-layer structure with a FSS of perforated hexagonal array transmitting the 325 GHz signal on the top layer while diverting the 183 GHz signal to the bottom layer. Measured results of the system demonstrate that the agreement can be achieved down to −30 dB signal level for both channels in the far field pattern. The discrepancy between the calculation and measurement is within 2 dB in the main beam region (2.5 times −3 dB beamwidth), verifying the effectiveness and accuracy of the proposed method.