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Title: | A Compact Dual-Polarized Filtering Antenna With Steep Cut-Off for Base-Station Applications |
Authors: | Liu, X Gao, S Hu, W Wen, L Luo, Q Sanz-Izquierdo, B Chen, X Qian, L Sumantyo, JTS Yang, X-X |
Keywords: | base-station antenna;dual-polarized antenna;filtering antenna;steep cutoff |
Issue Date: | 28-Mar-2022 |
Publisher: | Institute of Electrical and Electronics Engineers (IEEE) |
Citation: | Liu, X. et al. (2022) 'A Compact Dual-Polarized Filtering Antenna With Steep Cut-Off for Base-Station Applications', IEEE Transactions on Antennas and Propagation, 70 (7), pp. 5941 - 5946. doi: 10.1109/TAP.2022.3161280. |
Abstract: | A dual-polarized filtering antenna with steep cut-off and compact size is developed for base station applications. In this design, four controllable radiation nulls are obtained by utilizing split rings, slotted T-shaped branches, a single-stub tuner, and a parasitic loop. Split rings are firstly used as the dipole arms to obtain the 1st radiation null at upper out-of-band. Four T-shaped branches working as DGS are printed under the crossed dipoles to achieve the 2nd radiation null. The connected outer conductors of the differential feed structure acting as a single-stub tuner can provide the 3rd radiation null to further enhance the upper-band rejection. Finally, a parasitic loop is incorporated around the split rings, and the out-of-band rejection of the lower-band is further enhanced by the 4th radiation null. More importantly, the impedance bandwidth of the antenna can be expended with two newly introduced resonant modes. As a result, a compact filtering antenna with a wide operational bandwidth of 1.7- 3.01 GHz (56%) is realized for |Sdd11| < -15 dB with the isolation higher than 38 dB. The out-of-band suppression is higher than 18.4 dB in 3.1-4.5 GHz and more than 47 dB in 0.8-1.1 GHz. |
URI: | https://bura.brunel.ac.uk/handle/2438/28546 |
DOI: | https://doi.org/10.1109/TAP.2022.3161280 |
ISSN: | 0018-926X |
Other Identifiers: | ORCiD: Xuekang Liu https://orcid.org/0000-0002-3318-6812 ORCiD: Steven Gao https://orcid.org/0000-0002-7402-9223 ORCiD: Wei Hu https://orcid.org/0000-0002-7077-1500 ORCiD: Lehu Wen https://orcid.org/0000-0001-9757-1114 ORCiD: Qi Luo https://orcid.org/0000-0001-9000-4133 ORCiD: Benito Sanz-Izquierdo https://orcid.org/0000-0001-7313-2520 ORCiD: Xiaodong Chen https://orcid.org/0000-0002-1972-3271 ORCiD: Long Qian https://orcid.org/0000-0002-4518-4232 ORCiD: Josaphat Tetuko Sri Sumantyo https://orcid.org/0000-0002-4036-6854 ORCiD: Xue-Xia Yang https://orcid.org/0000-0001-8153-5952 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers |
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