A Novel Omnidirectional Circularly Polarized Pagoda Antenna with Four Shorting Pins for UAV Applications
Keywords:
Circularly polarized (CP), coupling patch, curved branch, omnidirectional antenna, shorting pinAbstract
A novel omnidirectional circularly polarized (CP) pagoda antenna with four shorting pins is presented. In this structure, four curved branches are utilized to generate horizontal polarization, while coaxial cable and four shorting pins produce vertical polarization. Omnidirectional CP radiation is achieved by combining the radiation from the branches and the shorting pins. The curved branches loaded with shorting pins reduce the size of the antenna and the antenna is loaded with the lower substrate with two coupling patches to improve the bandwidth. The novel pagoda antenna is fabricated and measured. Its final dimensions are 0.42λ0*0.42λ0*0.33λ0 (λ0 is the free-space wavelength at operating frequency). The impedance bandwidth (S11≤-10dB) is 0.53GHz and the axial ratio (AR) bandwidth (AR≤3dB) is 0.95GHz, which can be used for unmanned aerial vehicles’ diagram transmission in China.
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Y. M. Pan and K. W. Leung, “Wideband circularly polarized dielectric bird-nest antenna with conical radiation pattern,” IEEE Trans. Antennas Propag., vol. 61, no. 2, pp. 563-570, 2013.
G. Zheng and B. Sun, “High-gain normal-mode omnidirectional circularly polarized antenna,” IEEE Antennas and Wireless Propagation Letters, vol. 17, no. 6, pp. 1104-1108, June 2018.
Y. Fan, X. Y. Liu, and R. Li, “A broadband circularly polarized omnidirectional antenna with circular open-loops,” 2016 IEEE International Conference on Computational Electromagnetics (ICCEM), Guangzhou, pp. 200-201, 2016.
X. Quan, R. Li, and M. M. Tentzeris, “A broadband omnidirectional circularly polarized antenna,” IEEE Transactions on Antennas and Propagation, vol. 61, no. 5, pp. 2363-2370, May 2013.
Y. Fan, X. L. Quan, Y. Pan, Y. H. Cui, and R. L. Li, “Wideband omnidirectional circularly polarized antenna based on tilted dipoles,” IEEE Trans. Antennas Propag., vol. 63, no. 12, pp. 5961-5966, Dec. 2015.
C. Y. Liu and Q. X. Chu, “Omnidirectional circularly polarized antenna based on crossed dipoles,” 2016 IEEE International Conference on Microwave and Millimeter Wave Technology (ICMMT), Beijing, pp. 731-733, 2016.
L. Yang, N. W. Liu, Z. Y. Zhang, et al., “A novel single feed omnidirectional circularly polarized antenna with wide AR bandwidth,” Progress In Electromagnetics Research C, vol. 51, pp. 35-43, 2014.
J. Su and F. Zhang, “Capacitive probe fed broadband circularly polarized omnidirectional antenna,” 2018 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC), Xuzhou, pp. 1-1, 2018.
Q. X. Chu, Y. Mao, and X. R. Li. “A low-profile omnidirectional circularly polarized antenna using planar sector-shaped endfire elements,” IEEE Transactions on Antennas & Propagation, PP(99):1-1, 2017.
C. Guo, R. Yang, and W. Zhang, “Compact omnidirectional circularly polarized antenna loaded with complementary V-shaped slits,” IEEE Antennas and Wireless Propagation Letters, vol. 17, no. 9, pp. 1593-1597, Sept. 2018.
Q. Nie, Z. Zhang, and G. Fu, “A compact omnidirectional circularly polarized antenna for 5G communication system,” 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT), Chengdu, pp. 1-2, 2018.
H. H. Tran, N. Nguyen-Trong, and H. C. Park, “A compact wideband omnidirectional circularly polarized antenna using TM01 mode with capacitive feeding,” IEEE Antennas and Wireless Propa gation Letters, vol. 18, no. 1, pp. 19-23, Jan. 2019.
Y. Cai, S. Gao, Y. Yin, W. Li, and Q. Luo, “Compact-size low-profile wideband circularly polarized omnidirectional patch antenna with reconfigurable polarizations,” IEEE Transactions on Antennas and Propagation, vol. 64, no. 5, pp. 2016-2021, May 2016.
J. Li, Y. Huang, and G. Wen, “Design of a compact tri-band omnidirectional circularly polarized antenna,” 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, Boston, MA, pp. 121-122, 2018.
C. Y. Liu and Q. X. Chu, “A compact omnidirectional circularly polarized antenna” European Conference on Antennas and Propagation (Eu CAP 2018). IET, 1-2, 2018.
D. Wu, X. Chen, L. Yang, et al., “Compact and low-profile omnidirectional circularly polarized antenna with four coupling arcs for UAV applications,” IEEE Antennas and Wireless Propagation Letters, PP (99):1-1, 2017.
J. Liu, Q. Xue, H. Wong, H. W. Lai, and Y. Long, “Design and analysis of a low-profile and broadband microstrip monopolar patch antenna,” IEEE Transactions on Antennas and Propagation, vol. 61, no. 1, pp. 11-18, Jan. 2013.
Y. Z. Zhu, D. Su, W. Xie, et al., “Design of a novel miniaturized Vivaldi antenna with loading resistance for ultra wideband (UWB) applications,” Applied Computational Electromagnetics Society Journal, vol. 32, no. 10, 2017.
