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Journal of the Korean Institute of Electromagnetic and Science 2002;2(1):11-15.
CPW Feed Wideband U-slot Microstrip Antenna
Jong-In Lee1, Byoung-Moo Lee2, Young-Joong Yoon2
1R&D Group 1, Mobile & Communication Division, Samsung Electronics Co., Ltd.
2Dept. of Electronics Eng., Yonsei Univ.
Abstract
In this paper, we have proposed the new configuration of wideband antenna using CPW fred lines. The proposed antenna has CPW feed lines and U-slot to achieve wade bandwidth with good impedance matching. The use of CPW feed line can decrease the number of substrates. It is compared with the conventional antenna find by a microstrip fled line. The parameters of CPW fred lines were studied by using the quasi-static approximation which is based on the conformal mapping method. The analysis of CPW discontinuities such as the tapered-step structure and the open ended gap were studied by using the quasi-static approximation which is based on the boundary element method. Also, the equivalent circuit model of multi-layer antenna were proposed using the cavity model. Experiment results of the proposed antenna 7how wide-bandwidth characteristics and good radiation patterns in passband.
Key words: wideband, U-slot, CPW feed line, microstrip antenna.

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