volume | PIER Journals

Abstract

In this paper, a high-selectivity differential filtering quad-frequency antenna is proposed, consisting of two pairs of parallel enhanced folded dipoles and a diplexer. The diplexer employs unbalanced-to-balanced feeding, enabling the desired frequencies and transmission zero points by adjusting the lengths and distances between the stepped impedance resonators. Moreover, enhanced folded dipoles are arranged on either side of the substrate, which can feature a more compact structure and achieve multi-band radiation performance. For verification, a prototype of the proposed differential filtered quad-band antenna is fabricated and measured, having a size of 80 mm × 94.2 mm × 1 mm (1.10×1.29×0.0137λ_g at 2.53 GHz). Measured results show that the relative impedance bandwidths with |S₁₁| < -10 dB at the center frequencies of 2.53, 2.89, 3.30, and 3.68 GHz are 1.97%, 1.00%, 2.25%, and 2.04%, and the corresponding gains are 4.56, 2.82, 3.93, and 3.43 dBi, respectively, revealing its stable radiation performance and excellent anti-interference ability.

1. Yang, Qian, Wanyu Zhang, Hang Yi, Jingchao Sheng, Cheng Guo, Qinlong Li, and Anxue Zhang, "Compact millimeter-wave wideband bandpass filter design using triple-mode rectangular ridge resonator," IEEE Microwave and Wireless Technology Letters, Vol. 34, No. 7, 883-886, Jul. 2024.

2. You, Jiawen and Yuandan Dong, "Miniaturized planar pattern reconfigurable antenna for smart Wi-Fi applications," IEEE Antennas and Wireless Propagation Letters, Vol. 23, No. 1, 109-113, Jan. 2024.

3. Samal, Purna B., Shengjian Jammy Chen, and Christophe Fumeaux, "3-D-corrugated ground structure: A microstrip antenna miniaturization technique," IEEE Transactions on Antennas and Propagation, Vol. 72, No. 5, 4010-4022, May 2024.

4. Niotaki, Kyriaki, Sangkil Kim, Seongheon Jeong, Ana Collado, Apostolos Georgiadis, and Manos M. Tentzeris, "A compact dual-band rectenna using slot-loaded dual band folded dipole antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 12, 1634-1637, 2013.

5. Tian, Hongliang, Zhijiao Chen, Le Chang, Ruolin Wang, Shaofei Wang, Haiwen Liu, Chao Du, Di Zhou, and Zhewang Ma, "Differentially fed duplex filtering dielectric resonator antenna with high isolation and CM suppression," IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 69, No. 3, 979-983, Mar. 2022.

6. Lee, Seungchan, Jinseok Park, and Songcheol Hong, "Millimeter-wave multi-band reconfigurable differential power divider for 5G communication," IEEE Transactions on Microwave Theory and Techniques, Vol. 70, No. 1, 886-894, Jan. 2022.

7. Zolkov, Erez and Emanuel Cohen, "A quadrature balanced N-path receiver for frequency division duplex with thermal and phase noise cancellation under antenna VSWR," IEEE Transactions on Microwave Theory and Techniques, Vol. 72, No. 6, 3468-3475, Jun. 2024.

8. Li, Jianxing, Peng Hu, Juan Chen, Kai-Da Xu, Chun-Xu Mao, and Xiu Yin Zhang, "Dual-polarized duplex base-station antenna with a duplexer-integrated balun," IEEE Antennas and Wireless Propagation Letters, Vol. 21, No. 2, 317-321, Feb. 2022.

9. Soodmand, Soheyl, Kevin A. Morris, and Mark A. Beach, "On the effect of S-parameter stability of antenna and coupler on electrical balance duplexing," Journal of Electromagnetic Waves and Applications, Vol. 36, No. 10, 1352-1367, 2022.

10. Huang, He, Ying Liu, and Shuxi Gong, "A broadband dual-polarized base station antenna with anti-interference capability," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 613-616, 2016.

11. Li, Mingjian and Kwai-Man Luk, "A differential-fed magneto-electric dipole antenna for ultra-wideband applications," 2011 IEEE International Symposium on Antennas and Propagation (APSURSI), 1482-1485, Spokane, WA, USA, 2011.

12. Zhou, Changfei, Lei Guo, Hucheng Sun, Hui Li, and Min Li, "A wideband dual-polarized dual-mode antenna with simple differential feeding," IEEE Antennas and Wireless Propagation Letters, Vol. 19, No. 10, 1664-1668, Oct. 2020.

13. Leonardi, Ornella, Mario Giuseppe Pavone, Gino Sorbello, Andrea Francesco Morabito, and Tommaso Isernia, "Compact single-layer circularly polarized antenna for short-range communication systems," Microwave and Optical Technology Letters, Vol. 56, No. 8, 1843-1846, Aug. 2014.

14. Tang, Hui, Changwu Tong, and Jian-Xin Chen, "Differential dual-polarized filtering dielectric resonator antenna," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 8, 4298-4302, Aug. 2018.

15. Deng, Hong-Wei, Tao Xu, Yi-Fan Xue, Fei Liu, and Liang Sun, "Closely spaced broadband MIMO differential filtering slotline antenna with CM suppression," IEEE Antennas and Wireless Propagation Letters, Vol. 17, No. 12, 2498-2502, Dec. 2018.

16. Liu, Ying, Sihao Wang, Na Li, Jing-Bo Wang, and Jianping Zhao, "A compact dual-band dual-polarized antenna with filtering structures for sub-6 GHz base station applications," IEEE Antennas and Wireless Propagation Letters, Vol. 17, No. 10, 1764-1768, Oct. 2018.

17. Yang, Meng, Bian Wu, Chi Fan, Han-Yu Xie, Jian-Zhong Chen, and Liang Wu, "Synthesis and design of filtering antenna with flexible passband and radiation null based on parallel scheme," IEEE Antennas and Wireless Propagation Letters, Vol. 20, No. 5, 838-842, May 2021.

18. Li, Yapeng, Zhipeng Zhao, Zhaoyang Tang, and Yingzeng Yin, "Differentially fed, dual-band dual-polarized filtering antenna with high selectivity for 5G sub-6 GHz base station applications," IEEE Transactions on Antennas and Propagation, Vol. 68, No. 4, 3231-3236, Apr. 2020.

Dr. Sui Teng Zhang

Dr. Hao Ran Zhang

Dr. Wen-Tao Li