Synthesizing Microstrip Branch-Line Couplers With Predetermined Compact Size and Bandwidth

by: CW Tang, MG Chen

Microwave Theory and Techniques, IEEE Transactions on, Vol. 55, No. 9. (2007), pp. 1926-1934.

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Abstract

<para> A new method for designing the microstrip branch-line couplers with predetermined compact size and bandwidth is proposed in this paper. With the proposed approach, the size of the quarter-wavelength transmission line in the branch-line coupler can be reduced greatly. In addition, the proposed couplers can be easily fabricated on the printed circuit board without any lumped element. A chart concludes the relationship between bandwidth and size reduction rate. It shows that open stubs with low impedance perform better than those with high impedance; moreover, the more open stubs with low impedance utilized, the broader the bandwidth will be. Furthermore, the measured frequency responses show good agreement with the theoretical results. </para>

@article{citeulike:2067674, abstract = {<para> A new method for designing the microstrip branch-line couplers with predetermined compact size and bandwidth is proposed in this paper. With the proposed approach, the size of the quarter-wavelength transmission line in the branch-line coupler can be reduced greatly. In addition, the proposed couplers can be easily fabricated on the printed circuit board without any lumped element. A chart concludes the relationship between bandwidth and size reduction rate. It shows that open stubs with low impedance perform better than those with high impedance; moreover, the more open stubs with low impedance utilized, the broader the bandwidth will be. Furthermore, the measured frequency responses show good agreement with the theoretical results. </para>}, author = {Tang, C. W. and Chen, M. G. }, booktitle = {Microwave Theory and Techniques, IEEE Transactions on}, citeulike-article-id = {2067674}, journal = {Microwave Theory and Techniques, IEEE Transactions on}, keywords = {bandwidth, branch-line, coupler, microstrip}, number = {9}, pages = {1926--1934}, posted-at = {2007-12-06 16:53:13}, priority = {2}, title = {Synthesizing Microstrip Branch-Line Couplers With Predetermined Compact Size and Bandwidth}, url = {http://ieeexplore.ieee.org/xpls/abs\_all.jsp?arnumber=4298217}, volume = {55}, year = {2007} }

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TY - JOUR ID - citeulike:2067674 L3 - citeulike-article-id:2067674 TI - Synthesizing Microstrip Branch-Line Couplers With Predetermined Compact Size and Bandwidth T2 - Microwave Theory and Techniques, IEEE Transactions on JF - Microwave Theory and Techniques, IEEE Transactions on VL - 55 IS - 9 SP - 1926 EP - 1934 N2 - <para> A new method for designing the microstrip branch-line couplers with predetermined compact size and bandwidth is proposed in this paper. With the proposed approach, the size of the quarter-wavelength transmission line in the branch-line coupler can be reduced greatly. In addition, the proposed couplers can be easily fabricated on the printed circuit board without any lumped element. A chart concludes the relationship between bandwidth and size reduction rate. It shows that open stubs with low impedance perform better than those with high impedance; moreover, the more open stubs with low impedance utilized, the broader the bandwidth will be. Furthermore, the measured frequency responses show good agreement with the theoretical results. </para> KW - bandwidth KW - branch-line KW - coupler KW - microstrip AU - Tang, CW AU - Chen, MG PY - 2007/// UR - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4298217 ER -

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