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Bao, X. L., Ammann, M. J., Ruvio, G., and John, M., High Performance Circularly Polarized Antenna Based on the Fractal EBG Structure, in IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, White Plains, NY, USA, 2006, pp. 257-260.
Bao, X. L., Ruvio, G., Ammann, M. J., and John, M., A Novel GPS Patch Antenna on a Fractal Hi-Impedance Surface Substrate, IEEE Antennas and Wireless Propagation Letters, vol. 5, no. 1, pp. 323-326, 2006.
Bao, X. L., Ruvio, G., and Ammann, M. J., The use of Electromagnetic Bandgap Structures to Enhance Circularly Polarized Annular-Ring Patch Antenna Performance, in Royal Irish Academy Colloquium on Physical Layer Wireless Communications, Dublin, Ireland, 2006.
Bao, X. L. and Ammann, M. J., Dual-band GPS Patch Antenna based on Dual-band Fractal EBG Technique, in LAPC - Loughborough Antennas & Propagation Conference, Loughborough, UK, 2006, pp. 53-56.
Bao, X. L., Ruvio, G., and Ammann, M. J., Investigation on Annular-Ring Patch Antenna with EBG Structure, in European Conference on Antennas and Propagation - EuCAP, Nice, France, 2006, p. PA4.
Bao, X. L. and Ammann, M. J., Comparison of Several Novel Annular-Ring Microstrip Patch Antennas for Circular Polarization, Journal of Electromagnetic Waves & Applications, vol. 20, no. 11, pp. 1427-1438, 2006.
Bao, X. L. and Ammann, M. J., Compact Annular-Ring Embedded Circular Patch Antenna with a Cross-Slot Ground Plane for Circular Polarization, Electronics Letters, vol. 42, no. 4, pp. 192-193, 2006.
Bao, X. L. and Ammann, M. J., Compact Concentric Annular-Ring Patch Antenna for Triple-Frequency Operation, Electronics Letters, vol. 42, no. 20, pp. 1129-1130, 2006.
Bao, X. L. and Ammann, M. J., Investigation on UWB Printed Monopole Antenna with Rectangular Slitted Groundplane, Microwave and Optical Technology Letters, vol. 49, no. 7, pp. 1585-1587, 2007.
Bao, X. L. and Ammann, M. J., Printed Band-Reject UWB Antenna with H-Shaped Slot, in IEEE International Workshop on Antenna Technology: Small and Smart Antennas, Metamaterials and Applications, Cambridge, UK, 2007, pp. 319-322.
Bao, X. L. and Ammann, M. J., Investigation on Miniature Wideband Patch Antenna for Portable Wireless and Cellular Applications, in IEEE 65th Vehicular Technology Conference - VTC2007-Spring, Dublin, Ireland, 2007, pp. 348-351.
Bao, X. L. and Ammann, M. J., Small Patch/Slot Antenna with 53% Input Impedance Bandwidth, Electronics Letters, vol. 43, no. 3, pp. 146-148, 2007.
Bao, X. L. and Ammann, M. J., Dual-Frequency Circularly-Polarized Patch Antenna with Compact Size and Small Frequency Ratio, IEEE Transactions on Antennas & Propagation, vol. 55, no. 7, pp. 2104-2107, 2007.
Bao, X. L., Li, Z. F., and Sun, X. W., A New FDTD Scheme Analysis of the Characteristics of the Magnetic-Anisotropic EBG Structure, International Journal of RF and Microwave Computed-Aided Engineering, vol. 15, no. 3, pp. 317-324, 2005.
Bao, X. L., Li, Z. F., and Sun, X. W., Analysis of the Resonant Cavities Using the FDTD Scheme with Effective Permittivities Formulae, International Journal of Electronics, vol. 92, no. 7, pp. 393-399, 2005.
Bao, X. L., Sun, X. W., Li, Z. F., Bao, W. Y., and Qian, R., 35 GHz Patch Antenna Array Based on the Electromagnetic Band‐Gap Structure, International Journal of Infrared and Millimeter Waves, vol. 24, no. 12, pp. 1799-1804, 2004.
Bao, X. L., Li, Z. F., and Sun, X. W., The Simple Derivation For the Effective Permittivities Formulae In the Finite Difference Grids, in IEEE AP-S International Symposium on Antennas and Propagation, Monterey, CA, USA, 2004, vol. 1, pp. 89- 92.
Bao, X. L. and Zhang, W. X., The Dispersion Characteristics Of PBG With Complex Medium By Using Non-Yee Grid Higher Order FDTD Method, in IEEE AP-S International Symposium on Antennas and Propagation, Columbus, Ohio, USA, 2003, vol. 2, pp. 1128-1131.
Bao, X. L. and Zhang, W. X., A Hybrid GMT/PO Method For Calculating the NDC of the Irregular Edge of a Semi-Infinite Circular Cylinder, Microwave and Optical Technology Letters, vol. 31, no. 2, pp. 108-110, 2001.
Bao, X. L., Zhang, W. X., and Bo, Y. M., Numerical Diffraction Coefficients of the Irregular Top on a Semi-Infinite Conductive Circular-Cylinder a GMT/PO Approach, in International Symposium on Antennas, Propagation and EM Theory, Beijing, China, 2000, pp. 500-503.
Bao, X. L., Zhang, W. X., and Bo, Y. M., Numerical Diffraction Coefficients of the Irregular Top on a Conductive Cone a GMT/PO Approach, in International Symposium on Antennas, Propagation and EM Theory, Beijing, China, 2000, pp. 496 - 499.
Bao, X. L. and Zhang, W. X., A Hybrid GMT-PO Method for Calculating the NDC of the Irregular Edge of a Semi-Infinite Cone, International Journal of Infrared and Millimeter Waves, vol. 22, no. 8, pp. 1259-1265, 2001.
Bao, X. L., Zhang, W. X., and Li, L. W., FDTD Formulation For Bi-Anisotropic Medium, in IEEE AP-S International Symposium on Antennas and Propagation, Boston, Massachusetts, USA, 2001, vol. 1, pp. 52-55.
Bao, X. L., Sun, X. W., Li, Z. F., Bao, W. Y., and Qian, R., 4-Unit Patch Antenna Array Based on the Electromagnetic Bandgap Structure, in IEEE Asia Pacific Microwave conference, New Delhi, India, 2004.
Bao, X. L., Zhang, W. X., and Li, L. W., Study on the Dispersion Characteristics of PBG Structure Consisting of Anisotropic Medium By Using PSTD Method, Acta Electronica Sinica, vol. 65, no. 12, pp. 345-349, 2003.

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