Design of highly isolated common aperture microstrip antenna for L/S/C/X band
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摘要: 首次设计实现了一款能同时工作在L/S/C/X四个频段的高隔离共口径低剖面微带天线。整体结构通过依次按照频率从低至高的顺序自下而上将4个频段的微带天线堆叠而成,采用同轴探针穿过低频辐射贴片形成过孔给高频天线馈电,同时将低频天线作为其上层高频天线的地,以提高天线指标与性能。其中L/S/C波段的辐射贴片采用在矩形辐射贴片四周添加枝节的方式,更利于阻抗调节;X波段置于最顶层,通过对矩形贴片进行开槽处理,避免了对其它频段的辐射遮挡;通过采用中和线去耦合及正交馈电的方法,最终实现了4个频段内增益分别为6.85,7.48,6.13,6.62 dBi;各端口之间隔离均大于30 dB;天线尺寸为85 mm×85 mm×9.07 mm;通过实物加工,测试与仿真结果吻合良好,验证了设计的有效性和可靠性。Abstract: For the first time, a highly isolated common aperture low-profile microstrip antenna is designed and realized to work in four frequency bands—L/S/C/X, simultaneously. The overall structure is made by stacking microstrip antennas of four bands from bottom to top according to the order of frequency from low to high, using coaxial probes through the low-frequency radiation patch to form an over-hole to feed the high-frequency antenna and using the lower-frequency antenna as the ground of the higher-frequency one in turn to improve the antenna index and performance. Among them, each radiation patch of L/S/C band adopts the way of adding branches around a rectangular radiation patch, which is conducive to impedance adjustment. The X band radiation patch is placed at the top layer, and by slotting the rectangular patch, the radiation blocking to other bands is avoided. By adopting the method of neutralizing line decoupling and orthogonally feeding, the gain in the four bands is finally realized as 6.85 dBi, 7.48 dBi, 6.13 dBi, and 6.62 dBi respectively. The isolation between each port is greater than 30 dB. The antenna size is 85 mm×85 mm×9.07 mm. By means of the physical processing , the test results and simulation ones match well, which verifies the validity and reliability of the design.
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Key words:
- multi-band /
- high isolation /
- common aperture /
- microstrip antenna
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表 1 天线各项参量
Table 1. Parameters of fabricated antenna
G1/mm G2/mm G3/mm P1/mm P2/mm P3/mm H1/mm H2/mm 85 50 26 63.2 28.6 14.9 3 3 H3/mm L1/mm L2/mm L3/mm W1/mm W2/mm W3/mm 1.5 10 10 6 2.5 3.5 1.2 表 2 天线各项参量
Table 2. Parameters of fabricated antenna
G4/mm P4/mm L4/mm H4/mm W4/mm Lx/mm Wx/mm 11 8 2.5 1.5 0.5 3.5 1.8 表 3 不同天线性能对比
Table 3. Comparison of performance for various antennas
antenna size band isolation/dB Ref [4] 1.94$ {\lambda }_{0} $×1.94$ {\lambda }_{0} $×0.08$ {\lambda }_{0} $ C/X 15 Ref [11] 1.26$ {\lambda }_{0} $×1.26$ {\lambda }_{0} $×0.47$ {\lambda }_{0} $ S/X 10 Ref [14] 0.87$ {\lambda }_{0} $×0.87$ {\lambda }_{0} $×0.26$ {\lambda }_{0} $ L/S/X 25 this work 0.34$ {\lambda }_{0} $×0.34$ {\lambda }_{0} $×0.04$ {\lambda }_{0} $ L/S/C/X 30 -
[1] Kothapudi V K, Kumar V. A single layer S/X-band series-fed shared aperture antenna for SAR applications[J]. Progress in Electromagnetics Research C, 2017, 76: 207-219. doi: 10.2528/PIERC17070104 [2] Kati P, Kothapudi V K. 5-element series-feed shared aperture antenna array for X/Ku-band SAR applications[C]//2021 Photonics & Electromagnetics Research Symposium (PIERS). IEEE, 2021: 1689-1694. [3] Ji Shuosheng, Dong Yuandan, Wen Sichao, et al. C/X dual-band circularly polarized shared-aperture antenna[J]. IEEE Antennas and Wireless Propagation Letters, 2021, 20(12): 2334-2338. doi: 10.1109/LAWP.2021.3110529 [4] Mao Chunxu, Gao S, Wang Yi, et al. Dual-band circularly polarized shared-aperture array for C-/X-band satellite communications[J]. IEEE Transactions on Antennas and Propagation, 2017, 65(10): 5171-5178. doi: 10.1109/TAP.2017.2740981 [5] Vaziri A, Kaboli M, Mirtaheri S A. Dual-polarized aperture-coupled wideband microstrip patch antenna with high isolation for C-band[C]//2013 21st Iranian Conference on Electrical Engineering (ICEE). IEEE, 2013: 1-4. [6] Zheng Y Y, Liu C C, Ding Yanran. A shared-aperture broadband circularly polarized antenna for satellite communications and navigation[C]//2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting. IEEE, 2019: 1755-1756. [7] Wang Zongxin, Huang Zeqin. A microwave/millimeter wave dual-band shared aperture patch antenna array[J]. IEEE Access, 2020, 8: 218585-218591. doi: 10.1109/ACCESS.2020.3040250 [8] Piao Dazhi, Wang Meng, Zhang Linkun, et al. A two-port compact and high-isolated microstrip MIMO antenna[C]//2020 IEEE Asia-Pacific Microwave Conference (APMC). IEEE, 2020: 398-399. [9] Mei Peng, Zhang Shuai, Pedersen G F. A dual-polarized and high-gain X-/Ka-band shared-aperture antenna with high aperture reuse efficiency[J]. IEEE Transactions on Antennas and Propagation, 2021, 69(3): 1334-1344. doi: 10.1109/TAP.2020.3026429 [10] Chen Yikai, Zhao Jiacheng, Yang Shiwen. A novel stacked antenna configuration and its applications in dual-band shared-aperture base station antenna array designs[J]. IEEE Transactions on Antennas and Propagation, 2019, 67(12): 7234-7241. doi: 10.1109/TAP.2019.2930136 [11] Bai Chunxu, Cheng Yujian, Ding Yanran, et al. A metamaterial-based S/X-band shared-aperture phased-array antenna with wide beam scanning coverage[J]. IEEE Transactions on Antennas and Propagation, 2020, 68(6): 4283-4292. doi: 10.1109/TAP.2020.2970096 [12] Wang Chuang, Cao Wenquan, Hong Rentang, et al. Dual-band and dual-circularly polarized shared-aperture antenna based on UAV communication[C]//2021 IEEE 9th International Conference on Information, Communication and Networks (ICICN). IEEE, 2021: 406-410. [13] Jang D, Wang S, Kim Y, et al. Design of a dual-band shared-aperture radar array using printed dual-loop antennas[C]//2020 International Symposium on Antennas and Propagation (ISAP). IEEE, 2021: 75-76. [14] Li Ke, Dong Tao, Xia Zhenghuan. A broadband shared-aperture L/S/X-band dual-polarized antenna for SAR applications[J]. IEEE Access, 2019, 7: 51417-51425. doi: 10.1109/ACCESS.2019.2911965 [15] 钟顺时. 天线理论与技术[M]. 2版. 北京: 电子工业出版社, 2015: 264-319Zhong Shunshi. Antenna theory and techniques[M]. 2nd ed. Beijing: Publishing House of Electronics Industry, 2015: 264-319