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Dual wideband printed dipole antenna with integrated balun

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5 Author(s)
Lindberg, P. ; Signals & Syst. Group, Uppsala Univ. ; Ojefors, E. ; Barna, Z. ; Thornell-Pers, A.
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A printed dipole antenna with integrated balun is presented. The radiating structure is a two-element dipole with resonances at 900 and 1700 MHz, with the balun providing one extra resonance at each band. By co-designing the radiating element with a Marchand balun modified for dual-band operation, an antenna covering the cellular bands 824-960 and 1710-2170 MHz has been achieved. Measurements on a fabricated antenna on low-cost FR-4 substrate show antenna efficiencies of >80 and >70% in the lower and upper band respectively. Despite the use of a dual-element radiator, the radiation pattern that is close to omni-directional H-plane is obtained

Published in:

Microwaves, Antennas & Propagation, IET  (Volume:1 ,  Issue: 3 )