A circularly polarized (CP) patch antenna with a fractal structure that can be applied to the BeiDou navigation satellite system (BDS) is proposed. Etching two incomplete rings of different sizes with the antenna center as the center on the radiation patch generates CP. By adding a periodic structure based on the Sierpinski Carpet fractal around it, the size can be reduced while the gain is further improved. The dimension of the antenna is 0.35λo × 0.35λo × 0.03λo. Measured results manifest that the impedance bandwidth (S11 < -10 dB) is wider than 40 MHz at 1.561 GHz; the gain in 3-dB axial ratio (AR) bandwidth can reach 3.33 dBi; the beamwidth exceeds 140° in the 3-dB AR bandwidth.
2. Musthafa, A. M., M. Khalily, A. Araghi, O. Yurduseven, and R. Tafazolli, "Compact multimode quadrifilar helical antenna for GNSS-R applications," IEEE Antennas and Wireless Propag. Lett., Vol. 21, No. 4, 755-759, 2022.
doi:10.1109/LAWP.2022.3144968
3. Zhang, H., Y. Guo, and G. Wang, "A wideband circularly polarized crossed-slot antenna with stable phase center," IEEE Antennas and Wireless Propag. Lett., Vol. 18, No. 5, 941-945, 2019.
doi:10.1109/LAWP.2019.2906363
4. Sun, C., Z. Wu, and B. Bai, "A novel compact wideband patch antenna for GNSS application," IEEE Trans. Antennas Propag., Vol. 65, No. 12, 7334-7339, 2017.
doi:10.1109/TAP.2017.2761987
5. Choudhary, S. D., A. Srivastava, and M. Kumar, "Design of single-fed dual-polarized dual-band slotted patch antenna for GPS and SDARS applications," Microw. Opt. Technol. Lett.1, 1-8, 2020.
6. Guo, L., P. Zhang, F. Zeng, Z. Zhang, and C. Zhang, "A novel four-arm planar spiral antenna for GNSS application," IEEE Access, Vol. 9, 168899-168906, 2021.
doi:10.1109/ACCESS.2021.3133663
7. Gupta, S., P. Kshirsagar, and B. Mukherjee, "Sierpinski fractal inspired inverted pyramidal DRA for wide band applications," Electromagnetics, Vol. 38, No. 2, 103-112, 2018.
doi:10.1080/02726343.2018.1436738
8. Kuzu, S. and N. Akcam, "Array antenna using defected ground structure shaped with fractal form generated by apollonius circle," IEEE Antennas Wireless Propag. Lett.,, Vol. 16, 1020-1023, 2017.
doi:10.1109/LAWP.2016.2616944
9. Sun, C., et al., "A compact frequency-reconfigurable patch antenna for Beidou (COMPASS) navigation system," IEEE Antennas Wireless Propag. Lett., Vol. 13, 967-970, 2014.
10. Liu, Z., et al., "BeiDou navigation terminal multi-mode asymmetric slots circularly polarized microstrip antenna," Proceedings of 2014 3rd Asia-Pacific Conference on Antennas and Propagation, 382-385, Harbin, China, Jul. 26-29, 2014.
11. Zheng, K. and Q. Chu, "A novel annular slotted center-fed BeiDou antenna with a stable phase center," IEEE Antennas Wireless Propag. Lett., Vol. 17, No. 3, 364-367, 2018.
doi:10.1109/LAWP.2017.2778222
12. Zheng, K. and Q. Chu, "A small symmetric-slit-shaped and annular slotted BeiDou antenna with stable phase center," IEEE Antennas Wireless Propag. Lett., Vol. 17, No. 1, 146-149, 2018.
doi:10.1109/LAWP.2017.2778219
13. Nasimuddin, X. Qing, and Z. N. Chen, "A compact circularly polarized slotted patch antenna for GNSS applications," IEEE Trans. Antennas Propag., Vol. 62, No. 12, 6506-6509, 2014.
doi:10.1109/TAP.2014.2360218
14. Wang, L., X.-X. Yang, T. Lou, and S. Gao, "A miniaturized differentially fed patch antenna based on capacitive slots," IEEE Antennas Wireless Propag. Lett., Vol. 21, No. 7, 1472-1476, 2022.
doi:10.1109/LAWP.2022.3171841
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