WIDEBAND PATTERN RECONFIGURABLE PRINTED-YAGI ANTENNA ARRAY BASED ON FEED STRUCTURE
Keywords:Pattern reconfigurable, antenna array, printed-Yagi, wideband
A pattern reconfigurable antenna array with two elements is designed in this paper. The antenna element is made up of a printed Yagi and feed structure with variable phase. By changing the states of diodes in the feed structure of these two elements, the far-field radiation phase of both elements can be changed. That is, the pattern reconfigurable function of the array is realized. In this way, the impedance bandwidth of array is 75.9% (2.7~6.0GHz), in which the peak gain direction can be switched between -Î¸, 0 and +Î¸ (Î¸ = 10Â°~16Â°at different frequencies). And with the simple reconfigurable structure, the peak gain direction can be adjusted according to demands. It can be applied to broadband investigation systems. To verify the feasibility, a prototype is fabricated and measured, and reasonable agreement between the simulated and measured results is obtained.
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