Abstract
In this paper, the trapezoidal ring antenna using the conductor-backed CPW is designed and fabricated. The antenna has a broadband characteristic by the coupling efiects through inserted the H-shaped parasitic patch. The conductor-backed CPW shows more sta- ble characteristics than the CPW structure when there is occurred the variation between the feed-line and the ground plane in the front side. The bandwidth of the designed antenna is 2.2GHz»4.6GHz below i10dB.
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