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Abstract: A filtering antenna is a device with both filtering and radiating capabilities. It can be used to reduce the cross-band mutual coupling between the closely spaced elements operating at different frequency bands. We review the authors’ work on filtering antenna designs and three related dual-band base-station antenna arrays as application examples. The filtering antenna designs include single- and dual-polarized filtering patch antennas, a single-polarized omni-directional filtering dipole antenna, and a dual-polarized filtering dipole antenna for the base station. The filtering antennas in this paper feature an innovative concept of eliminating extra filtering circuits, unlike other available antennas. For each design, the filtering structure is finely integrated with the radiators or feeding lines. As a result, the proposed designs have the advantages of compact size, simple structure, good in-band radiation performance, and low levels of loss, and do not contain complicated filtering circuits. Based on the proposed filtering antennas, single- and dual-polarized dual-band antenna arrays were developed. Separate antenna elements at different frequency bands were used to achieve the dual-band performance. The cross-band mutual couplings between the elements at different bands were reduced substantially using the antenna inherent filtering performance. The dual-band arrays exhibited better performance as compared to typical industrial products. Some of the proposed technologies have been transferred into the industry.

滤波天线：从创新概念到工业应用

[1]Andrew Corp., 2007. NNPX306M Datesheet, Hickory, NC, USA.

[2]Chen FC, Hu HT, Li RS, et al., 2017. Design of filtering microstrip antenna array with reduced sidelobe level. IEEE Trans Antenn Propag, 65(2):903-908.

[3]Deng HW, Xu T, Liu F, 2018. Broadband pattern- reconfigurable filtering microstrip antenna with quasi- Yagi structure. IEEE Antenn Wirel Propag Lett, 17(7): 1127-1131.

[4]Ding CF, Zhang XY, Zhang Y, et al., 2018. Compact broadband dual-polarized filtering dipole antenna with high selectivity for base-station applications. IEEE Trans Antenn Propag, 66(11):5747-5756.

[5]Duan W, Zhang XY, Pan YM, et al., 2016. Dual-polarized filtering antenna with high selectivity and low cross polarization. IEEE Trans Antenn Propag, 64(10):4188- 4196.

[6]Duan W, Cao YF, Pan YM, et al., 2019. Compact dual-band dual-polarized base-station antenna array with a small frequency ratio using filtering elements. IEEE Access, 7:127800-127808.

[7]Fakharian MM, Rezaei P, Orouji AA, et al., 2016. A wideband and reconfigurable filtering slot antenna. IEEE Antenn Wirel Propag Lett, 15:1610-1613.

[8]Hsieh CY, Wu CH, Ma TG, 2015. A compact dual-band filtering patch antenna using step impedance resonators. IEEE Antenn Wirel Propag Lett, 14:1056-1059.

[9]Hu HT, Chen FC, Qian JF, et al., 2017. A differential filtering microstrip antenna array with intrinsic common-mode rejection. IEEE Trans Antenn Propag, 65(12):7361-7365.

[10]Qin PY, Wei F, Guo YJ, 2015. A wideband-to-narrowband tunable antenna using a reconfigurable filter. IEEE Trans Antenn Propag, 63(5):2282-2285.

[11]Sun GH, Wong SW, Zhu L, et al., 2015. A compact printed filtering antenna with good suppression of upper harmonic band. IEEE Antenn Wirel Propag Lett, 15:1349- 1352.

[12]Tang MC, Chen Y, Shi T, et al., 2018. Bandwidth-enhanced, compact, near-field resonant parasitic filtennas with sharp out-of-band suppression. IEEE Antenn Wirel Propag Lett, 17(8):1483-1487.

[13]Wu JN, Zhao ZQ, Nie ZP, et al., 2013. A broadband unidirectional antenna based on closely spaced loading method. IEEE Trans Antenn Propag, 61(1):109-116.

[14]Wu JN, Zhao ZQ, Nie ZP, et al., 2015. A printed unidirectional antenna with improved upper band-edge selectivity using a parasitic loop. IEEE Trans Antenn Propag, 63(4): 1832-1837.

[15]Zhang XY, Duan W, Pan YM, 2015. High-gain filtering patch antenna without extra circuit. IEEE Trans Antenn Propag, 63(12):5883-5888.

[16]Zhang XY, Xue D, Ye LH, et al., 2017. Compact dual-band dual-polarized interleaved two-beam array with stable radiation pattern based on filtering elements. IEEE Trans Antenn Propag, 65(9):4566-4575.

[17]Zhang Y, Zhang XY, Ye LH, et al., 2016. Dual-band base station array using filtering antenna elements for mutual coupling suppression. IEEE Trans Antenn Propag, 64(8):3423-3430.

[18]Zhang Y, Zhang XY, Pan YM, 2018. Low-profile planar filtering dipole antenna with omnidirectional radiation pattern. IEEE Trans Antenn Propag, 66(3):1124-1132.