Progress In Electromagnetics Research C · 2012 · 26 citations · 21 references
EngineeringElectrical EngineeringAntennasMicrowave EngineeringWireless CommunicationsAntenna BandwidthAntenna DesignAntenna Impedance MatchingMicrowave AntennasPlanar AntennasSmall AntennasCompact Antenna DesignCoplanar WaveguidesMicrowave Impedance MatchingMonopole AntennasPlanar Antenna DesignPrinted AntennasResonance FrequenciesReturn Loss
Abstract—A compact coplanar waveguide (CPW)-fed printed monopole antenna comprising of two symmetrical C-shaped radiating elements, a parasitic E-shaped strip, and a truncated CPW ground for WLAN/WiMAX applications is proposed. By embedding a parasitic E-shaped strip inside the two symmetrical C-shaped radiating elements, four resonant frequencies and three operating bands are obtained. By etching two quarter-circles in the CPW ground, impedance matching condition of the third operating band is significantly improved. A prototype of the proposed antenna has been constructed and experimentally studied. The measured results show that three distinct operating bandwidths with 10 dB return loss are about 500MHz (2.33–2.83GHz), 700MHz (3.27–3.97GHz) and 2.37GHz (4.3–6.67GHz), covering all the 2.4/5.2/5.8GHz WLAN and 2.5/3.5/5.5GHz WiMAX bands. Furthermore, the antenna has a simple planar structure and a small volume of only 31 × 21 × 1.6mm3. Good radiation characteristics and acceptance peak realized gains are obtained over the operating bands. 1.
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