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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. 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., Differentially-fed Microstrip Patch Antenna for Omni-directional GPS Application, in LAPC - Loughborough Antennas & Propagation Conference, Loughborough, UK, 2013, pp. 18-21.
Bao, X. L., Li, Z. F., and Sun, X. W., An Approximate Expression of the Effective Permittivity In the Inhomogeneous Difference Unit Grid, Journal of Applied Sciences, 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., 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., 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.
Bao, X. L. and Zhang, W. X., Analysis on the Characteristics of Electromagnetic Wave Propagation of PBG Structure By Using FDTD Method, Chinese Journal of Radio Science, vol. 16, pp. 120-122, 2001.
Bao, X. L., Ruvio, G., and Ammann, M. J., Directional Dual-Band Slot Antenna with Dual-Bandgap High-Impedance-Surface Reflector, Progress In Electromagnetics Research, vol. C, no. 9, pp. 1-11, 2009.
Bao, X. L. and Ammann, M. J., Printed UWB Antenna with Coupled Slotted Element for Notch-frequency Function, International Journal of Antennas & Propagation, vol. 2008, p. Article ID 713921, 8 pages, 2008.
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., 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 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., Li, Z. F., and Sun, X. W., FDTD Analysis of Dispersion Characteristics of 2-D Dielectric Photonic Crystal Described By Effective Permittivity in Grid, Journal of Shanghai Jiaotong University, 2004.
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., 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., 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., 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. 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., 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. and Ammann, M. J., Design of Compact Annular-Ring Patch Antennas for Circular Polarization, in China Ireland International Conference on Information & Communication Technologies, Maynooth, Ireland, 2009, pp. 11-15.
Bao, X. L. and Ammann, M. J., (Invited) Compact Spiral Loaded Printed Monopole Antenna, in European Conference on Antennas and Propagation - EuCAP, Barcelona, Spain, 2010, pp. C12P2-4.
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., 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. 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.

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