(HPBW)半功率波束频宽.ppt

* * Microstrip Patch Antennas With Enhanced Gain by Partial Substrate Removal Adviser: Hung-Chi Yang Speaker: Yu-Ming Chen IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 58, NO. 9, SEPTEMBER 2010 Siew Bee Yeap, Member, IEEE, and Zhi Ning Chen, Fellow, IEEE 2010/12/15 * Methods ＆ Materials * Half-Power Beam Width (HPBW)：半功率波束頻寬 Aperture-coupled patch antennas with different substrate removal configurations. * Methods ＆ Materials (a) Measured gain of Design I–VI, (b) Gain increment of Designs II–VI at their respective resonance frequencies compared to Design I at 2.4 GHz. Methods ＆ Materials * Measured radiation patterns of the patch antennas with different substrate removal con?gurations (Designs I–VI). Methods ＆ Materials * Mutual Coupling d is chosen at 0.1, 0.25, 0.5, 0.75, and 1λ0 Two aperture-coupled patch antennas placed opposite to each other with separation. Methods ＆ Materials * Comparison of isolation at 2.4 GHz for Designs I and II with varying separation. Methods ＆ Materials * Comparison of normalized electric field distributions at 2.4 GHz as d = 0.5λ0 for (a) Design I—top view, (b) Design II—top view, (c) Design I—side view, and (d) Design II—side view. Conclusion * The high permittivity has been improved up to 2.4–2.7 dB when the substrate surrounding the radiating edges of the patch antenna have been fully or partially removed. Therefore, the partial substrate removal is capable of improving gain and maintaining mechanical robustness of patch antennas. Future works * Antenna Implementation Applications References * [1] R. B. Waterhouse, Microstrip Patch Antennas—A Designer’s Guide.Boston, MA: Kluwer Academic Publishers, 2003, ch. 4. [2] D. R. Jackson, J. T. Williams, A. K. Bhattacharyya, R. L. Smith, S. J.Buchheit, and S. A. Long, “Microstrip patch designs that do not excite surface waves,” IEEE Trans. Antennas Propag., vol. 41, no. 8, pp.1026–1037, Aug. 1993. [3] Z. N. Chen, “Broadband probe-fed plate a