Electronics Letters · 2009 · 53 citations · 5 references
EngineeringElectrical EngineeringAntennasMicrowave EngineeringWireless CommunicationsAntenna MeasurementAntenna PolarizationAntenna RadiationAntenna Radiation PatternsBroadband AntennasMicrowave AntennasBroadband Antenna DesignDipole AntennasDual-polarized AntennasFolded Dipole AntennasHigh-frequency IsolationIsolationRadiation PatternsReturn Loss
A broadband dual-polarised antenna with four end-to-end folded dipoles and a U-shaped ground is presented. Stable and symmetric radiation patterns at slanted ±45° polarisation have been obtained within the band 1.71–2.17 GHz. Measurements show two linear polarisations with an isolation of more than 30 dB over the operating frequency band. A return loss less than −14 dB is achieved and the measured cross-polar level is 23.5 dB below the co-polar level within the above-mentioned band.
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