Electronics Letters · 2011 · 18 citations · 3 references
EngineeringAutomotive EngineeringElectrical EngineeringAntennasMicrowave EngineeringWireless CommunicationsAntenna DesignAntenna DirectivityAntenna GainMicrowave AntennasPlanar AntennasSmall AntennasCompact Antenna DesignDirectional AntennaDirectivityFront-to-back RatioMonopole AntennasSizeYagi-uda Antenna DesignYagi-uda Antennas
A compact Yagi-Uda antenna for vehicle directional communications in tactical VHF (30–88 MHz) is presented. A special double-folded monopole is designed as the element of the Yagi-Uda antenna to realise compact size and high directivity. The proposed antenna designed and optimised at 59 MHz can utilise the vehicle space reasonably with greatly compact height (0.1199λ) and space between elements (0.125λ). It has satisfactory performances of high directivity, gain (6.3 dBi) and front-to-back ratio (8.6 dB) in the operating band (VSWR<2), better than the typical monopole-type Yagi-Uda antenna. Thus, it is suitable for vehicle directional communications in tactical VHF. The effectiveness of the design is verified by a scaled-down model at 1 GHz.
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