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Article
Bandwidth, Cross-Polarization, and Feed-Point Characteristics of Matched Hilbert Antennas
Departmental Papers (ESE)
  • Jinhui Zhu, Villanova University
  • Ahmad Hoorfar, Villanova University
  • Nader Engheta, University of Pennsylvania
Document Type
Journal Article
Date of this Version
1-1-2003
Comments

Copyright Year IEEE. Reprinted from IEEE Antennas and Wireless Propagation Letters, Volume 2, Issue 1, January 2003, pages 2-5.
Publisher URL:http://ieeexplore.ieee.org/xpl/tocresult.jsp?isNumber=27112&puNumber=7727

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Abstract
In this work, we have applied a moment-method-based simulation code to perform a detailed parametric study of the bandwidth, cross-polarization level, and the feed location characteristics of the matched Hilbert antenna. It is shown that a properly chosen off-center near-the-end feed point may provide an approximate 50-Ω real input impedance at the fundamental resonant frequency. The role of different iteration order for Hilbert antennas, approximately matched to 50-Ω line, on the bandwidth and cross-polarization level of such antennas are investigated numerically. As was shown by Vinoy et al. the radiation patterns resemble those of a linear dipole and for a fixed-area-matched Hilbert antenna, the resonant frequency can be lowered by increasing the iteration order n. However, for such matched antennas, the bandwidth for VSWR < 2 will be decreased and the cross-polarization level may be different for the higher iteration-order antennas.
Keywords
  • Bandwidth,
  • Hilbert antenna,
  • input impedance,
  • matched antenna,
  • miniaturized antenna,
  • small antenna
Citation Information
Jinhui Zhu, Ahmad Hoorfar and Nader Engheta. "Bandwidth, Cross-Polarization, and Feed-Point Characteristics of Matched Hilbert Antennas" (2003)
Available at: http://works.bepress.com/nader_engheta/14/