A dual-band circularly-polarized microstrip antenna is proposed, and the antenna for GPS is designed. The radiation characteristics of the dual-band circular polarization are achieved by installing one pair of L-shaped slits at all edges of the square patch. The impedance matching in the dual band is tuned by an L-probe feed. The proposed antenna is effective and useful in the design for dual-band circularly-polarized operation.
2. Khidre, A., K.-F. Lee, F. Yang, and A. Elsherbeni, "Wideband circularly polarized E-shaped patch antenna for wireless applications," IEEE Antennas Propag. Mag., Vol. 52, 219-229, 2010.
doi:10.1109/MAP.2010.5687547
3. Nasimuddin, Z. N. Chen, and X. Qing, "Dua-band circularly polarized S-shaped slotted patch antenna with a small frequency-ratio," IEEE Trans. Antennas Propag., Vol. 58, No. 6, 2112-2115, 2010.
doi:10.1109/TAP.2010.2046851
4. Sung, Y., "Dual-band circularly polarized pentagonal slot antenna," IEEE Antennas Wireless Propag. Lett., Vol. 10, 259-261, 2011.
doi:10.1109/LAWP.2011.2129551
5. Chang, T.-N. and J.-M. Lin, "Serial aperture-coupled dual band circularly polarized antenna," IEEE Trans. Antennas Propag., Vol. 59, No. 6, 2419-2423, 2011.
doi:10.1109/TAP.2011.2144553
6. Bao, X. L. and M. J. Ammann, "Monofilar spiral slot antenna for dual-fr equency dual-sense circular polarization," IEEE Trans. Antennas Propag., Vol. 59, No. 8, 3061-3065, 2011.
doi:10.1109/TAP.2011.2158964
7. Narbudowicz, A., X. L. Bao, and M. J. Ammann, "Dual-band omnidirectional circularly polarized antenna," IEEE Trans. Antennas Propag., Vol. 61, No. 1, 77-83, 2013.
doi:10.1109/TAP.2012.2214992
8. Chen, B. and F.-S. Zhang, "Dual-band dual-sense circularly polarized slot antenna with an open-sot and a vertical stub," Progress In Electromagnetics Research Letters, Vol. 48, 51-57, 2014.
doi:10.2528/PIERL14062104
9. Chen, C.-H. and E. K. N. Yung, "A novel unidirectional dual-band circularly-polarized patch antenna," IEEE Trans. Antennas Propag., Vol. 59, No. 8, 3052-3057, 2011.
doi:10.1109/TAP.2011.2158961
10. Nayeri, P., K.-F. Lee, A. Z. Elsherbeni, and F. Yang, "Dual-band circularly polarized antennas using stacked patches with asymmetric U-slots," IEEE Antennas Wireless Propag. Lett., Vol. 10, 492-495, 2011.
doi:10.1109/LAWP.2011.2153820
11. Chen, X., C. G. Parini, B. Collins, Y. Yao, and M. U. Rehmanm, Antennas for Global Navigation Satellite Systems, John Wiley & Sons, Chichester, 2012.
doi:10.1002/9781119969518
12. Fujimoto, T. and D. Tanaka, "An L-probe fed stacked rectangular microstrip antenna combined with a ring antenna for triple band operation in ITS," Progress In Electromagnetics Research C, Vol. 37, 1-13, 2013.
doi:10.2528/PIERC12120911