Publications

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Journal Article
Bao, X. L. and Ammann, M. J., Dual-Frequency Dual-Sense Circularly-Polarized Slot Antenna Fed by Microstrip Line, IEEE Transactions on Antennas & Propagation, vol. 56, no. 3, pp. 645-649, 2008.
Bao, X. L. and Ammann, M. J., Dual-Frequency Dual Circularly-Polarized Patch Antenna with Wide Beamwidth, Electronics Letters, vol. 44, no. 21, pp. 1233-1234, 2008.
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.
Narbudowicz, A., Bao, X. L., and Ammann, M. J., Dual-band Omnidirectional Circularly Polarized Antenna, IEEE Transactions on Antennas & Propagation, vol. 61, no. 1, pp. 77-83, 2013.
Narbudowicz, A., Bao, X. L., and Ammann, M. J., Dual Circularly-polarized Patch Antenna Using Even and Odd Feed-line Modes, IEEE Transactions on Antennas & Propagation, vol. 61, no. 9, pp. 4828-4831, 2013.
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.
Narbudowicz, A., John, M., Sipal, V., Bao, X. L., and Ammann, M. J., Design Method for Wideband Circularly Polarized Slot Antennas, IEEE Transactions on Antennas & Propagation, vol. 63, no. 10, pp. 4271 - 4279, 2015.
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.
Curto, S., McEvoy, P., Bao, X. L., and Ammann, M. J., Compact Patch Antenna for Electromagnetic Interaction with Human Tissue at 434 MHz, IEEE Transactions on Antennas & Propagation, vol. 57, no. 9, pp. 2564-2571, 2009.
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., 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.
Narbudowicz, A., Bao, X. L., Ammann, M. J., Shakhtour, H., and Heberling, D., Circularly Polarized Antenna with Steerable Dipole-like Radiation Pattern, IEEE Transactions on Antennas & Propagation, vol. 62, no. 2, pp. 519 - 526, 2014.
Bao, X. L., Ruvio, G., and Ammann, M. J., A Circularly Polarized Annular-ring Patch Antenna with a Groundplane EBG Annular-slot Array, International Journal of Microwave and Optical Technology, vol. 3, no. 2, pp. 69-75, 2008.
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., 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., Application on the Microstrip Patch Array Antenna with the Electromagnetic Bandgap Structure, Journal of Microwave, 2005.
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. 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., 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. and Zhang, W. X., Analysis of Dispersion Characteristics of 2-D Dielectric PBG Structure By Using Multi-Resolution Time-Domain Method, Journal of Southeast University, vol. 33, pp. 243-247, 2003.
Bao, X. L., Zhang, W. X., Zheng, L. G., and Li, L. W., Analysis of Dispersion Characteristics In 2-D Dielectric PBG Structure Using FDTD Method, Journal of Applied Sciences, vol. 21, no. 3, pp. 236-240, 2003.
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.
Conference Paper
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.
Narbudowicz, A., John, M., Bao, X. L., and Ammann, M. J., Vivaldi Array for Generation of UWB Circular Polarization, in IEEE International Symposium on Antennas and Propagation, Chicago, IL, USA, 2012, p. 360.2.
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.

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