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This paper proposes dual beam antennas for 6-sector cellular systems using multi-element array, suppressing the side lobe level to interfere with adjacent cell area. Dual beam is given by phase controlled feed circuit and parasitic elements.
A pair of small and low-profile orthogonal dual-polarization combined antenna has been proposed for miniature indoor Multiple-Input Multiple-Output (MIMO) base station to restrain spatial correlation in Line-Of-Sight (LOS) channel environment. A disk loaded monopole antenna is used for vertical polarization component and a notch array antenna with parasitic elements for horizontal polarization component...
In this paper, we propose a novel feeding circuit for switching an omni-directional and directive radiation patterns. The proposed circuit changes the radiation patterns by phase differences and switching of the feed elements, and it has five operation modes. We illustrate the operation principle, the output characteristics and the obtained radiation patterns. The analytical results show that the...
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