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CIICT 2009 Proceedings

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[4] C.Y.Sim, K.W.Lin, J.S.Row, Design of AnAnnular-Ring Microstrip Antenna for CircularPolarization, IEEE Antennas and PropagationSociety International Symposium, Vol.1, 2004,pp.471-474.[5] H.M.Chen and K.L.Wong, On the circularpolarization of annular-ring microstrip antennas,IEEE Transactions on Antennas and Propagation,Vol.47, No.8, 1999, pp.1289-1292.[6] J.S.Row, Design of Aperture-CoupledAnnular-Ring Micrsotrip Antennas for CircularPolarization, IEEE Transactions on Antennas andPropagation, vol.53, No.5, 2005, pp.1779-1784.[7] X.L.Bao and M.J.Ammann, Compact AnnularringEmbedded Circular Patch Antenna with aCross-slot Ground Plane for Circular Polarization,IEE Electronics Letters, 2006, 42, (4), 192-193.[8] X.L.Bao, and M.J.Ammann, A single-layerDual-frequency Circularly-polarized PatchAntenna with Compact Size and Small FrequencyRatio, IEEE Transaction on Antennas andPropagation, Vol.55, No.7, 2007, pp.2104-2107.Table 2. Dimensional parameters for the antennasParameters(mm) R1 R2 R3 W1 W2 L1 L2 SD1 Wp FeedPointSingle CP Antenna 24.8 9.0 - - - 48.0 50.0 4.0 2.8 (-5,-5)Dual CP Antenna 24.0 18.9 6.5 0.8 7.5 40 42.4 -- -- (-3,-3)15

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