Ultra‐Wideband Planar Monopole Antennas with Improved Characteristics

Two planar elliptical ultra-wideband (UWB) monopole antennas with total efficiency greater than 97% in the UWB are investigated. One has attractive feature and an excellent impedance matching with return loss lower than -22 dB in the whole UWB and the other one has very good radiation pattern characteristics. (c) 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2149-2154, 2013

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