Miniaturized fractal rat-race, branch-line, and coupled-line hybrids

@article{citeulike:1942906, abstract = {In this paper, space-filling curves have been used to realize a family of miniaturized hybrids. The large surface area occupied by a conventional structure has been significantly reduced through the use of space-filling curves having the same electrical characteristics. Several space-filling curves have been studied and implemented in different designs. The second-iteration Moore rat-race coupler occupies only 12.6\% of the conventional coupler's area, while the area of the second-iteration Sierpinski branch-line coupler is 24.7\% of the conventional case. On the other hand, a nine-section Minkowski coupled-line balun is confined in 60\% of the conventional balun's area. However, the effective size reduction depends on the used space-filling curve, compression ratio, and associated coupling between segments. The performance of the proposed space-filling hybrids is as good as that of the corresponding conventional structures, and even better in some cases. The design and simulation of the proposed space-filling hybrids have been performed using a moment-method-based full-wave electromagnetic simulator. Measurements of one fabricated coupler prototype are in good agreement with simulation results.}, author = {Ghali, H. and Moselhy, T. A. }, booktitle = {Microwave Theory and Techniques, IEEE Transactions on}, citeulike-article-id = {1942906}, journal = {Microwave Theory and Techniques, IEEE Transactions on}, keywords = {branch-line, coupler, fractal, ratrace}, number = {11}, pages = {2513--2520}, posted-at = {2007-11-20 10:54:32}, priority = {2}, title = {Miniaturized fractal rat-race, branch-line, and coupled-line hybrids}, url = {http://ieeexplore.ieee.org/xpls/abs\_all.jsp?arnumber=1353534}, volume = {52}, year = {2004} }

TY - JOUR ID - citeulike:1942906 L3 - citeulike-article-id:1942906 TI - Miniaturized fractal rat-race, branch-line, and coupled-line hybrids T2 - Microwave Theory and Techniques, IEEE Transactions on JF - Microwave Theory and Techniques, IEEE Transactions on VL - 52 IS - 11 SP - 2513 EP - 2520 N2 - In this paper, space-filling curves have been used to realize a family of miniaturized hybrids. The large surface area occupied by a conventional structure has been significantly reduced through the use of space-filling curves having the same electrical characteristics. Several space-filling curves have been studied and implemented in different designs. The second-iteration Moore rat-race coupler occupies only 12.6% of the conventional coupler's area, while the area of the second-iteration Sierpinski branch-line coupler is 24.7% of the conventional case. On the other hand, a nine-section Minkowski coupled-line balun is confined in 60% of the conventional balun's area. However, the effective size reduction depends on the used space-filling curve, compression ratio, and associated coupling between segments. The performance of the proposed space-filling hybrids is as good as that of the corresponding conventional structures, and even better in some cases. The design and simulation of the proposed space-filling hybrids have been performed using a moment-method-based full-wave electromagnetic simulator. Measurements of one fabricated coupler prototype are in good agreement with simulation results. KW - branch-line KW - coupler KW - fractal KW - ratrace AU - Ghali, H AU - Moselhy, TA PY - 2004/// UR - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1353534 ER -