UWB antenna based on SCRLH-TLs for portable wireless devices
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A novel miniature ultrawideband antenna is proposed that exhibits excellent radiation characteristics. The antenna is based on the simplified composite right/left-handed transmission-lines (SCRLH-TLs) that are implemented using F-shaped and T-shaped slits on the antenna's ground-plane and radiating arms, respectively. The coplanar waveguide feed-line is impedance matched to the radiating patches using H-shaped microstrip stub. The antenna operates between 0.65 and 9.2 GHz, which corresponds to an impedance bandwidth of 173.6%. The maximum gain and efficiency measured are 3.5 dBi and 70% at 4.5 GHz, respectively. The antenna dimensions are 25 × 15 × 1.6 mm3 or 0.054¿0×0.032¿0×0.003¿0, where ¿0 is free-space wavelengths at 0.65 GHz. © 2016 Wiley Periodicals, Inc.
h-shaped microstrip stub; f-shaped and t-shaped slits; ground-plane; radiating arms; patch; miniature ultrawideband antenna simplified composite right/left-handed transmission-lines antenna feeders antenna grounds coplanar waveguides directional patterns (antenna) electric impedance electromagnetic wave transmission microstrip antennas mobile antennas slot antennas ultra-wideband (uwb) composite right/left-handed transmission lines coplanar waveguide feeds free-space wavelengths impedance bandwidths microstripes portable wireless device radiation characteristics ultra wide-band antennas microwave antennas