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This paper provides a ground plane solution for the fractal-shaped reconfigurable dual-band slot-ring antenna by using the Electromagnetic Band-Gap (EBG) surfaces. The EBG surface is designed with an in-phase bandwidth from 1.7 to 3.0 GHz. A distance between the EBG and the antenna is selected to be 7. 5 mm. The EBG-backed reconfigurable slot-ring antenna operates at two frequency bands based on the...
This paper presents a continuously-tunable single-polarized slot-ring antenna operating at S band. The frequency tunability is achieved by loading the slot-ring antenna with varactors. By properly designing the feeding network and biasing circuits, the slot-ring antenna is able to cover 2–4 GHz. A prototype antenna was fabricated and measured. The measured return loss is better than 9 dB from 2.66...
In general, the radiation pattern of an antenna array can be predicted by the array factor and the radiation pattern of the array element. However, the radiation pattern of a reconfigurable slot-ring antenna varies with ground plane size. To explore the reconfigurable slot-ring antenna array performance, the effects of the ground plane size on radiation pattern of the reconfigurable slot-ring antenna...
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