Journal
IEEE ACCESS
Volume 7, Issue -, Pages 49804-49812Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2019.2909771
Keywords
Dual-slot-fed patch; filtering antenna array; millimeter-wave antenna array; substrate integrated waveguide (SIW); TE (20)-mode
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Funding
- Zhejiang Provincial Natural Science Foundation of China [LQ18F010003]
- National Natural Science Foundation of China [61722107]
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In this paper, the integration design of a millimeter-wave filtering patch antenna array fed by a substrate integrated waveguide (SIW) four-way anti-phase filtering power divider is proposed. The multilayer four-way anti-phase filtering power divider handily implemented using the intrinsic field distribution of TE20-mode in SIW is proposed for miniaturization. The signal of the lower substrate integrated waveguide cavity (SIWC) bandpass filter is directly coupled to the upper TE20-mode SIW through a coupling slot. The intrinsic field distribution of TE20-mode SIW is used to generate anti-phase signals. This filtering power divider can be utilized as the feeding structure of a millimeter-wave filtering antenna array. To verify the design concept, a 28-GHz SIW-fed 1 x 4 filtering patch antenna array with three-layer substrates is designed and fabricated. The measured results show a fractional bandwidth of 5.03% ranging from 27.15 to 28.55 GHz, a peak gain of 11.1 dBi, cross-polarization levels lower than -20 dB, symmetric radiation patterns in both E-plane and H-plane, and high selectivity.
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