A Miniaturized Planar Space-filling Curve Antenna with Wideband Monopole-like Radiation Characteristics

摘要

The ever increasing applications of wireless communication systems and the concurrent need for conformal and/or low profile antennas have put an increased demand on antenna engineers to produce low-profile antenna designs. In particular, many applications require planar/conformal antennas but with monopole-like, vertically polarized radiation, a design challenge that cannot be easily achieved by using conventional microstrip patch or other types of printed antennas. In the present work, we investigate the characteristics of utilizing planar metallic paths in the form of Peano and Hilbert space-filling curves (SFC) [1] to provide top-loading properties to electrically short monopole antenna elements. Because the higher order SFC curve paths are resonant at frequencies for which the area that encloses the curve can be considered as electrically small, these curves may offer resonant loading characteristics in compact, low-profile and potentially conformal antenna designs, with monopole-like radiation patterns.