Wideband printed monopole antenna for application in wireless communication systems

摘要: Empirical results of an electrically small printed monopole antenna are described with a fractional bandwidth 185% (115 MHz to 2.90 GHz) for return-loss better than 10 dB, peak gain and radiation efficiency at 1.45 GHz 2.35 dBi 78.8%, respectively. The geometry can be approximated back-to-back triangular shaped patch structure that is excited through common feed-line meander-line T-shape divider. truncated ground-plane includes central stub located underneath the feed-line. impedance enhanced inclusion slots in four double split-ring resonators on underside radiating patches. radiates approximately omni-directionally provide coverage over large part very high frequency, whole ultrahigh L-band some parts S-band. has dimensions 48.32 × 43.72 0.8 mm 3 , which corresponding electrical size 0.235 λ 0 0.211 0.003 0 , where free-space wavelength GHz. proposed low-profile low-cost suitable application wideband wireless communications systems.