Design of a Wideband Frequency Selective Surface With Low Insertion Loss for a Triple-Band Cryogenic Receiver

IF 1.2 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Microwave and Optical Technology Letters Pub Date : 2025-08-23 DOI:10.1002/mop.70369

Rongyu Wang, Weiye Zhong, Miao Zhang, Chao Zhang, Jia Ma, Hui Zhang, Yuanyuan Cui

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引用次数: 0

Abstract

A wideband and low-insertion-loss frequency selective surface (FSS) is proposed for the K/Q/W-band cryogenic receiver of the Tianma Radio Telescope (TMRT). The FSS is designed to transmit W-band electromagnetic waves (80–110 GHz) while reflecting K-band (18–26 GHz) and Q-band (35–50 GHz) signals. To reduce insertion loss caused by conventional prepreg bonding, a triple-layer air-gap-supported metal-dielectric structure is introduced. Each layer consists of hexagonal copper rings and patches patterned on Rogers 5880 substrates. The FSS achieves a measured insertion loss of 0.21 dB under $3 0^{\circ}$ oblique incidence, with stable performance under both Transverse Electric (TE) polarization and Transverse Magnetic (TM) polarization. Compared to recent designs, this study achieves a superior trade-off between bandwidth and insertion loss at $3 0^{\circ}$ incidence, which is critical for quasi-optical systems in millimeter-wave astronomy.

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用于三波段低温接收机的低插入损耗宽带频率选择表面设计

提出了一种用于天马射电望远镜（TMRT） K/Q/ w波段低温接收机的宽带低插入损耗频率选择表面（FSS）。FSS设计用于传输w波段（80-110 GHz）的电磁波，同时反射k波段（18-26 GHz）和q波段（35-50 GHz）的信号。为了减少传统预浸料键合造成的插入损耗，提出了一种三层气隙支撑的金属介电结构。每一层由六角形铜环和贴片组成，贴片在罗杰斯5880衬底上。FSS在30°$3{0}^{\circ}$斜入射下的测量插入损耗为0.21 dB，在横向电（TE）极化和横向磁（TM）极化下均具有稳定的性能。与最近的设计相比，本研究在30°$3{0}^{\circ}$入射下的带宽和插入损耗之间实现了更好的平衡，这对毫米波天文学中的准光学系统至关重要。

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来源期刊

Microwave and Optical Technology Letters 工程技术-工程：电子与电气

CiteScore

3.40

自引率

20.00%

发文量

371

审稿时长

4.3 months

期刊介绍： Microwave and Optical Technology Letters provides quick publication (3 to 6 month turnaround) of the most recent findings and achievements in high frequency technology, from RF to optical spectrum. The journal publishes original short papers and letters on theoretical, applied, and system results in the following areas. - RF, Microwave, and Millimeter Waves - Antennas and Propagation - Submillimeter-Wave and Infrared Technology - Optical Engineering All papers are subject to peer review before publication