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CP microstrip antenna with wide beamwidth for GPS band application

CP microstrip antenna with wide beamwidth for GPS band application

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This paper presents a technique developed for increasing the beam width of the circularly polarised (CP) radiation. With a pyramidal ground structure and a partially enclosed flat conducting wall adopted, the designed CP patch antenna has a height of about 0.12λ only and exhibits a 3 dB axial-ratio beamwidth of more than 130°. The experimental results for operating in the 1575 MHz GPS band are presented and discussed.

References

    1. 1)
      • C.L. Tang , J.Y. Chiou , K.L. Wong . Beamwidth enhancement of a circularly polarized microstrip antenna mounted on a three-dimensional ground structure. Microw. Opt. Technol. Lett. , 1 , 149 - 153
    2. 2)
      • Laubner, T.L., Schilling, R.: `Microstrip antenna with improved low angle performance', US Patent Publication No. 1049520 A1, 2002.
    3. 3)
      • Nakano, H., Shimada, S., Yamauchi, J., Miyata, M.: `A circularly polarized patch antenna enclosed by a folded conducting wall', IEEE Conf. on Wireless Communication Technology, 2003, Honolulu, Hawaii, p. 134–135.
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