Ultra-Wide Bandwidth Enhancement of Single-Layer Single-Feed Patch Antenna Using the Theory of Characteristic Modes
Keywords:
Bandwidth broadening, characteristic mode analysis, L-probe, microstrip patch antennas, Tprobe, theory of characteristic modes, U-slot, UWBAbstract
The Theory of Characteristic Modes (TCM) is proposed as a systematic approach to antenna design to achieve the goal of finding the antenna structure with optimum broadband behavior. This theory provides a physical insight to the radiating nature of microstrip patch antennas and reduces the design optimization time. In this work, the resonant behavior of the highly radiating structure of the single U-slot rectangular patch on a single-layer epsilon r = 4.4 substrate is analyzed using TCM. Modal analysis of this single-layer structure with different single feed excitations concludes that VSWR less than or equal to 2 impedance bandwidth in the order of 96% can be achieved with a single T-probe feed. Experimental results, included here, show VSWR less than or equal to 2 impedance bandwidth in the order of 71%.
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References
V. Natarajan and D. Chatterjee, “Comparative evaluation of some empirical design techniques for CAD optimization of wideband U-Slot microstrip antennas,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 20, no. 1, pp. 50-69, March 2005.
G. Rafi, and L. Shafai, “Broadband microstrip patch antenna with V-slot,” IEE Proceedings Microwaves Antennas and Propagation, vol. 151, no. 5, pp. 435-440, 2004.
R. F. Harrington and J. R. Mautz, “Theory of characteristic modes for conducting bodies,” IEEE Trans. Antennas Propag., vol. AP-19, no. 5, pp. 622–628, Sept. 1971.
M. Vogel, G. Gampala, D. Ludick, U. Jakobus, and C.J. Reddy, “Characteristic mode analysis: putting physics back into simulation,” IEEE Antennas Propag. Mag., vol. 57, no. 2, pp. 307- 317, Apr. 2015.
M. M. Elsewe and D. Chatterjee, “Modal analysis of patch slot designs in microstrip patch antennas,” 2016 IEEE International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES), Honolulu, HI, March 13-17, 2016.
M. M. Elsewe and D. Chatterjee, “Modal analysis of substrate permittivities in microstrip patch antennas,” 2016 IEEE International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES), Honolulu, HI, March 13-17, 2016.
M. M. Elsewe and D. Chatterjee, "Characteristic mode analysis of ground plane size in microstrip patch antennas," 2016 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, Fajardo, Puerto Rico, June 26-July 1, 2016.
M. M. Elsewe and D. Chatterjee, "Characteristic mode analysis of excitation feed probes in microstrip patch antennas," 2016 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, Fajardo, Puerto Rico, June 26- July 1, 2016.
C.L. Mak, K.F. Lee, and K.M. Luk, “Broadband patch antenna with a T-shaped probe,” IEE Proceedings Microwaves Antennas and Propagation, vol. 147, no. 2, pp. 73-76, 2000.
