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Bao, X. L. and Ammann, M. J., Wideband Unidirectional Circularly Polarized Antenna for GPS/Galileo/GLONASS, in IEEE International Symposium on Antennas and Propagation, Chicago, IL, USA, 2012, p. 460.4.
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. 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., 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., Zhang, W. X., and Li, L. W., Study on the Bandgap Characteristics of Complex Material PBG Structure By Using Non-Yee Grid Higher Order FDTD Method, Chinese Journal of Radio Science, vol. 18, no. 4, pp. 353-358, 2003.
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., Li, Z. F., and Sun, X. W., Application on the Microstrip Patch Array Antenna with the Electromagnetic Bandgap Structure, Journal of Microwave, 2005.
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., A Cavity-Backed Spiral Slot Antenna with Wide Axial Ratio Beamwidth for GPS System, Microwave and Optical Technology Letters, vol. 56, no. 5, pp. 1050-1054, 2014.
Bao, X. L., Shynu, S. V., and Ammann, M. J., Design of a Tunable Compact Antenna for Digital Video Broadcasting Handheld Terminals, in LAPC - Loughborough Antennas & Propagation Conference, Loughborough, UK, 2009, pp. 461-464.
Bao, X. L. and Zhang, W. X., Comparison Study of FDTD And MRTD Methods For Analyzing the 2-D PBG Structure, in Cross Strait Tri-Regional Radio Science and Wireless Technology Conference, Shanghai, China, 2002, pp. 172-175.
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., Yang, K., O’Conchubhair, O., and Ammann, M. J., Differentially-fed Omnidirectional Circularly Polarized Patch Antenna for RF Energy Harvesting, in European Conference on Antennas and Propagation - EuCAP, Davos, Switzerland, 2016.
Bao, X. L., Zhang, W. X., and Li, L. W., Analysis on the Dispersion Characteristics of Complex Medium PBG Structure by Using Non-Yee Grid FDTD Method, Chinese Journal of Radio Science, vol. 18, no. 4, 2003.
Bao, X. L., Ruvio, G., and Ammann, M. J., Low-Profile Dual-Frequency GPS Patch Antenna Enhanced with Dual-Band EBG Structure, Microwave and Optical Technology Letters, vol. 49, no. 11, pp. 2630-2634, 2007.
Bao, X. L. and Ammann, M. J., Microstrip-Fed Dual-Frequency Annular-Slot Antenna Loaded by Split-Ring Slot, IET Microwaves, Antennas & Propagation, vol. 3, no. 5, pp. 757-764, 2009.
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., 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., Zhang, W. X., and Li, L. W., PSTD Analysis For Dispersion Characteristics of PBG Structure In Complex Medium, in The Progress in Electromagnetics Research Symposium, Singapore, 2003.
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., Printed Circularly-Polarized Antenna with Ultra-Wide Axial-Ratio Bandwidth, IET Microwaves, Antennas & Propagation, vol. 5, no. 9, pp. 1089-1096, 2011.
Bao, X. L., Li, Z. F., and Sun, X. W., Calculation of the Effective Permittivity Approximate In the Difference Grid Based on a Simple Method, in Cross Strait Tri-Regional Radio Science and Wireless Technology Conference, Qualin, China, 2003, pp. 77-80.
Bao, X. L. and Ammann, M. J., Printed Triple-band Circularly Polarized Antenna for the Wireless Systems, Electronics Letters, vol. 50, no. 23, pp. 1664-1665, 2014.
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. and Ammann, M. J., Compact Concentric Annular-Ring Patch Antenna for Triple-Frequency Operation, Electronics Letters, vol. 42, no. 20, pp. 1129-1130, 2006.

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