Journal
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Volume 19, Issue 12, Pages 2526-2530Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2020.3038790
Keywords
Antenna arrays; Array signal processing; Antenna measurements; Dipole antennas; Transmission line measurements; Antenna radiation patterns; Connectors; Dual-polarized antenna; endfire antenna; millimeter-wave (mmWave) antenna; multibeam antenna; substrate-integrated waveguide (SIW)
Funding
- National Natural Science Foundation of China [61861136002, 61627801]
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A compact multibeam endfire dual-polarized antenna array for low-cost millimeter-wave (mmWave) applications is proposed in this letter. Multimode substrate-integrated waveguide (SIW) section with interactions is applied as the basic beamformer. The dual-mode SIW is used in the beamforming network to support dual-polarization application without occupying an extra area. The printed dipole antenna with integrated balun and the open-ended SIW antenna with metallic strips are integrated to realize an endfire dual-polarized antenna element. Based on this endfire antenna element, a multibeam dual-polarized antenna array is developed. The proposed antenna array includes a four-element antenna array, an SIW beamforming network, and transitions. Additional air gaps between antenna elements are designed for mutual coupling reduction. The fabricated multibeam endfire dual-polarized antenna array achieves an impedance bandwidth of 11.3%, and the overlapped 3 dB beamwidth of the four generated beams in two polarizations are able to cover a wide range between +/- 41 degrees. The proposed low-cost multibeam antenna array can be a good candidate for 5G mmWave wireless applications.
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