Bandwidth, cross-polarization, and feed-point characteristics of matched Hilbert antennas

Jinhui Zhu, A. Hoorfar, N. Engheta
2003 IEEE Antennas and Wireless Propagation Letters  
In this work, we have applied a moment-methodbased 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-real input impedance at the fundamental resonant frequency. The role of different iteration order for Hilbert antennas, approximately matched to 50-line, on the bandwidth and
more » ... -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 . 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. Index Terms-Bandwidth, Hilbert antenna, input impedance, matched antenna, miniaturized antenna, small antenna.
doi:10.1109/lawp.2003.810765 fatcat:l4zbbilyyretnbdyokzpqkfgqe