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Abstract
A novel horizontally polarized (HP) antenna with omnidirectional pattern is presented in this paper. The proposed antenna applies the concept of rotating electric fleld method to conventional slot dipoles. Two CPW-fed slot dipoles are placed in a perpendicularly conjugate form. By properly arranging the magnitude and phase of input signals, the omnidirectional pattern can be synthesized at broadside. A prototype is developed at the 2.6GHz band, which ofiers a horizontally polarized omnidirectional radiation pattern with gain of 2.5{3.4dBi, and the measured antenna e-ciency is greater than 73% through the operating band (2.4{2.8GHz). Furthermore, a 20-dB polarization purity is achieved in this design. The overall volume of the proposed antenna is 22 £ 22 £ 90mm 3 (0.19‚0£0:19‚0£0:78‚0). Distinct from the other proposed HP antennas provided with planar geometry, this antenna is slim in shape, and it can be readily integrated with vertical dipoles to form a polarization diversity system in current wireless router and AP applications.
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