Jiahui Ye, Junbo Chen, Yuchang Chen, Weiliang Yu, Guo Qing Luo
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引用次数: 0
Abstract
This paper proposes a low-profile absorptive frequency-selective structure (AFSS) that exhibiting a wide absorption band and a wide low-insertion-loss transmission band. The AFSS is composed of two layers, separated by an air spacer layer. In the lossy layer, two meander-line loops loaded with lumped resistors are used to broaden the absorption band. Additionally, a frequency selective surface (FSS) based on a substrate-integrated waveguide (SIW) is proposed to achieve a wide transmission band. To reduce the insertion loss of the transmission band in the high frequency band, numerous circular holes are drilled in the substrate. Furthermore, two independent square patches are employed at the upper and bottom layers of the substrate to improve the performance stability under oblique incidence. The proposed bandpass AFSS achieves an absorption band from 2.67 to 8.58 GHz, with a fractional bandwidth of 105.07% and a 1-dB transmission band between 10.25 and 15.04 GHz, with a fractional bandwidth of 37.88%. A prototype is fabricated, assembled and tested, and the results exhibit a good agreement with the simulation results. And the thickness of the proposed AFSS is only 0.087λL, indicating that the design is very thin.
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