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Due to electrical connection between the array elements, standard baluns typically used in arrays of resonant dipoles are not effective for connected arrays. Therefore, a novel Printed Circuit Board (PCB) solution to avoid common-mode resonances, without resorting to active components or MMIC technology, is proposed in this paper. It consists in a loop-shaped component that rejects the common mode,...
The paper presents a unique omnidirectional three-element dipole array that can be adjusted to provide vertical, horizontal, or circular polarization for a variety of wireless applications. The 2:1 voltage standing wave ratio bandwidth of the antenna over all configurations is greater than 10%, but performance data is presented for the personal communication services (PCS) band (1850-1990 MHz).
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