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J. Electromagn. Eng. Sci > Volume 13(2); 2013 > Article
Journal of Electromagnetic Engineering and Science 2013;13(2):120-126.
DOI: https://doi.org/10.5515/JKIEES.2013.13.2.120   
Compact Rotman Lens with Size-Reduced Transition Structures between the Lens Body and the Connecting Lines
Woosung Lee1, Youngsub Kim1, Jaeheung Kim2, Young Joong Yoon1
1Department of Electrical and Electronic Engineering, Yonsei University
2Yonsei Institute of Convergence Technology, Yonsei University
Abstract
This paper introduces a new design for a Rotman lens that has been proposed to minimize its size and provide a suitable design for a compact beamforming system. The size reduction is realized by minimizing the length of the transition structures, which are positioned between the lens body and the connecting lines. The proposed structure is much shorter than a conventional transition structure, which is a tapered line in general. As a result, a 45% size reduction can be achieved by using the proposed transition structure, compared to a typical Rotman lens with linearly tapered lines. Therefore, the proposed Rotman lens will be suitable for compact beamforming systems.
Key words: Rotman Lens, Beamforming Network, Transition Structure, Tapered Line
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