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Electrical and electronic engineering
This paper proposes a new patch antenna with dual circularly polarized capability at 2.575 GHz. The design exploits the even and odd modes in a coplanar waveguide transmission line and enables simultaneous right- and left-handed circular polarization, with two individual excitation ports. A patch antenna is fed by multimode transmission line and the advantages and disadvantages are discussed. A prototyped antenna realized up to 20 dB isolation between ports with S21 < -10dB bandwidth of 87 MHz. Realized gains for the two modes of operation are 5.77 and 7.23 dBic. The proposed structure is compact and easy to manufacture.
Narbudowicz, A., Bao, X. L. & Ammann, M. J. Dual circularly-polarized patch antenna using even and odd feed-line modes, >i>IEEE Transactions on Antennas & Propagation, vol. 61, issue 9, pp. 4828-4831, 09/2013. doi:10.1109/TAP.2013.2269471