A High-Gain and Wideband Filtering Millimeter-Wave Fabry-Pérot Cavity Antenna Enabled by High-Pass Source and Low-Pass Surface
- Publisher:
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Publication Type:
- Journal Article
- Citation:
- IEEE Transactions on Antennas and Propagation, 2023, 71, (7), pp. 5684-5694
- Issue Date:
- 2023-07-01
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Filename | Description | Size | |||
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A_High-Gain_and_Wideband_Filtering_Millimeter-Wave_FabryProt_Cavity_Antenna_Enabled_by_High-Pass_Source_and_Low-Pass_Surface.pdf | Published version | 13.1 MB |
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This article introduces a filtering technique applied to the design of a wideband and high-gain Fabry-Pérot cavity (FPC) antenna for millimeter-wave (mm-wave) applications. The suggested method is to insert a low-pass frequency selective surface (FSS) into an FPC with intrinsic high-pass feeding source. By a combination of the two components (FSS and source), bandpass response can be generated effectively while maintaining high-gain performances realized by the proposed FPC. Both the proposed high-pass source and low-pass FSS exhibit wideband characteristics with tunable radiation nulls. Combined with a multimode resonant cavity structure, wideband performances can be achieved for the total antenna. For demonstration, a filtering FPC antenna operating at 30 GHz is designed, fabricated, and measured. The antenna consists of a low-pass feeding source, a modified ground, a partially reflective surface (PRS), and a low-pass FSS. Measured results show that the operating bandwidth of the antenna is from 22 to 30.5 GHz for the refection coefficient ≤ -10 dB. It realizes a flat in- band gain with a peak gain of 19.5 dBi. The in- band radiation patterns are stable, whereas the out-of-band radiation suppression level is around 14 dB.
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