In this paper, a differentially-fed, multi-band patch antenna with bandpass filtering response is proposed. The antenna consists of two pairs of crossed dipoles, four Γ-shaped feedlines, and four steeped-impedance microstrip lines. With the introduction of Γ-shaped feedlines and U-shaped slots on the radiating patch, extra radiation nulls are induced, four operation bands with band-pass filtering response are obtained. More importantly, the filtering response of the antenna is generated without any filtering circuit, which is easy to design for antenna engineers. Measured results of the prototype show that the proposed antenna has stable radiation patterns with low cross-polarization of better than -26 dB. Besides, bandpass filtering response of the realized gain with deep roll-off can also be observed between different operation bands. Excellent radiating performance make it a promising candidate for 5G wireless communication systems.
2. Mao, C. X., et al., "A novel multiband directional antenna for wireless communications," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 1217-1220, 2016.
doi:10.1109/LAWP.2016.2628715
3. Mao, C. X., et al., "A shared-aperture dual-band dual-polarized filtering-antenna-array with improved frequency response," IEEE Transactions on Antennas & Propagation, Vol. 65, 1836-1844, 2017.
doi:10.1109/TAP.2017.2670325
4. Qian, J. F., et al., "A wide stopband filtering patch antenna and its application in MIMO system," IEEE Transactions on Antennas & Propagation, Vol. 67, 654-658, 2018.
doi:10.1109/TAP.2018.2874764
5. Tang, H., C. W. Tong, and J. X. Chen, "Differential dual-polarized filtering dielectric resonator antenna," IEEE Transactions on Antennas & Propagation, Vol. 66, 4298-4302, 2018.
doi:10.1109/TAP.2018.2836449
6. Hu, P. F., et al., "A compact quasi-isotropic dielectric resonator antenna with filtering response," IEEE Transactions on Antennas & Propagation, Vol. 67, 1294-1299, 2019.
doi:10.1109/TAP.2018.2883611
7. Hu, P. F., et al., "A filtering patch antenna with reconfigurable frequency and bandwidth using F-shaped probe," IEEE Transactions on Antennas & Propagation, Vol. 67, 121-130, 2019.
doi:10.1109/TAP.2018.2877301
8. Zhang, X. Y., et al., "Low-profile dual-band filtering patch antenna and its application to LTE MIMO system," IEEE Transactions on Antennas & Propagation, Vol. 65, 103-113, 2017.
doi:10.1109/TAP.2016.2631218
9. Lin, C. K. and S. J. Chung, "A compact filtering microstrip antenna with quasi-elliptic broadside antenna gain response," IEEE Antennas and Wireless Propagation Letters, Vol. 10, 381-384, 2011.
doi:10.1109/LAWP.2011.2147750
10. Li, Y., Z. Zhao, Z. Tang, and Y. Yin, "A low-profile, dual-band filtering antenna with high selectivity for 5G sub-6GHz applications," Microw. Opt. Technol. Lett., 1-6, 2019, https://doi.org/10.1002/mop.31891.
11. J. F. Q., F. C. Chen, and Q. X. Chu, "A novel tri-band patch antenna with broadside radiation and its application to filtering antenna," IEEE Transactions on Antennas & Propagation, Vol. 66, 5580-5585, 2018.
doi:10.1109/TAP.2018.2853160
12. Jin, J. Y., S. W. Liao, and Q. Xue, "Design of filtering-radiating patch antennas with tunable radiation nulls for high selectivity," IEEE Transactions on Antennas & Propagation, Vol. 66, 2125-2130, 2018.
doi:10.1109/TAP.2018.2804661
13. Ding, C. F., et al., "Compact broadband dual-polarized filtering dipole antenna with high selectivity for base station applications," IEEE Transactions on Antennas & Propagation, Vol. 66, 5747-5756, 2018.
doi:10.1109/TAP.2018.2862465
14. Alkurt, F. O., et al., "Antenna-based microwave absorber for imagingin the frequencies of 1.8, 2.45, and 5.8 GHz," Optical Engineering, Vol. 57, 113102, 2018, doi: 10.1117/1.OE.57.8.087110.
doi:10.1117/1.OE.57.11.113102
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