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A novel differential-fed dipole antenna with compact size is proposed and investigated. The size of the antenna is only 0.8λ0 × 0.8λ0 × 0.13λ0 (where λ0 is the free-space wavelength at the centre frequency). By utilising a pair of complementary sources, the antenna achieves good unidirectional radiation performances. The antenna has an impedance bandwidth of 38.5% for <alternatives>${\rm SWR} \lt 2$...
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