@inproceedings{09582dbcb91546b5a455c85a0064300b,
title = "Design of dual-band microstrip rat race coupler with circuit miniaturization",
abstract = "Rat race ring coupler with stepped-impedance sections is designed to have a dual-band characteristic. This is realized by attaching open stubs to both ends of each steppedimpedance section to create a phase of 90° at two designated frequencies. Transcendental equations are derived for solving impedance ratio R and lengths of the stepped-impedance sections. Circuit with miniaturized area can be obtained if R > 1 is chosen. Such microstrip ring hybrids operating at 2.45/5.2 GHz with R = 1 and R = 4 are designed and fabricated. Experiments are performed to confirm the theory.",
keywords = "Directional coupler, Dual-band, Miniaturization, Rat race coupler, Stepped-impedance",
author = "Hsu, {Ching Luh} and Chang, {Chin Wei} and Kuo, {Jen Tsai}",
year = "2007",
doi = "10.1109/MWSYM.2007.380319",
language = "英语",
isbn = "1424406889",
series = "IEEE MTT-S International Microwave Symposium Digest",
pages = "177--180",
booktitle = "2007 IEEE MTT-S International Microwave Symposium Digest",
note = "2007 IEEE MTT-S International Microwave Symposium, IMS 2007 ; Conference date: 03-06-2007 Through 08-06-2007",
}