Abstract
A very-wideband microstrip antenna is proposed and studied. The antenna has a simple structure comprising a rectangular patch embedded into a notch cut in the finite ground plane edge. The novel structure is bent to reduce antenna height and is divided into two resonators: an open loop and a planar monopole. The former simultaneously excites half- and one-wavelength modes to form a wide bandwidth for lower band operation of the design. In addition, the planar monopole with its inherent broadband property provides the upper-band operation. With a small volume of 45×10×5 mm3, the impedance bandwidth of the proposed antenna is up to 128% impedance bandwidth from 1.80 to 8.23 GHz. Moreover, the non-correlative current paths on the driven elements provide the independence of band adjustment. Owing to the balanced loop structure and the gaps between patch and ground plane, antenna performances are preserved from the integration with an liquid crystal display panel.
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