内置90°波导扭曲的210-373 GHz宽带OMT

IF 3.9 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Igor Lapkin;Cristian Daniel López;Denis Meledin;Leif Helldner;Mathias Fredrixon;Alexey B. Pavolotsky;Sven-Erik Ferm;Vincent Desmaris;Victor Belitsky
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引用次数: 0

摘要

在本文中,我们提出了一种针对210-373 GHz频段的宽带正交换能器(OMT)的设计。OMT采用改进的Bøifot布局,并经过优化以适应狭窄的空间限制,例如ALMA墨盒。由于OMT输出的共线定位,通过允许在两个极化链中使用相同的配置和组件,OMT布局协调了两个极化的接收器墨盒组件。OMT具有内置的新型宽带90°波导扭曲,通过去除h -分裂波导,最大限度地减少插入RF损耗,同时简化接收器组件与ALMA墨盒中的2SB混频器的集成。制造的OMT通过采用频率扩展模块的VNA直接测量来表征。波导适配器用于容纳OMT波导端口,其尺寸为760 × 760 μm用于输入端口,380 × 760 μm用于VNA扩展模块的输出端口。测试结果表明,在95%的频带内,交叉极化优于-25 dB,输出反射优于15 dB,射频插入损耗优于0.8 dB。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Wideband OMT for the 210–373 GHz Band With Built-In 90° Waveguide Twist
In this article, we present the design of a wideband orthomode transducer (OMT) that aims for the frequency band 210–373 GHz. The OMT employs a modified Bøifot layout and is optimized to fit into the tight spatial constraints, e.g., of the ALMA cartridge. The OMT layout harmonizes the receiver cartridge components for both polarizations by allowing the use of the same configuration and components in both polarization chains because of the OMT outputs’ colinear positioning. The OMT features a built-in novel broadband 90° waveguide twist, which minimizes the insertion RF loss by removing the H-split waveguide while eases receiver component integration with the 2SB mixers in the ALMA cartridge. The manufactured OMT was characterized by direct measurements with a VNA employing frequency extension modules. The waveguide adapters were used accommodating the OMT waveguide ports having dimensions 760 × 760 μm for the input port and 380 × 760 μm for the output ports to the VNA extension modules. The OMT demonstrated the cross pol better than –25 dB across 95% of the frequency band, the output reflections better than 15 dB, and the RF insertion loss better than 0.8 dB.
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来源期刊
IEEE Transactions on Terahertz Science and Technology
IEEE Transactions on Terahertz Science and Technology ENGINEERING, ELECTRICAL & ELECTRONIC-OPTICS
CiteScore
7.10
自引率
9.40%
发文量
102
期刊介绍: IEEE Transactions on Terahertz Science and Technology focuses on original research on Terahertz theory, techniques, and applications as they relate to components, devices, circuits, and systems involving the generation, transmission, and detection of Terahertz waves.
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