A Dual-Band Coupled-Line Coupler With an Arbitrary Coupling Coefficient
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摘要A novel dual-band coupled-line coupler with an arbitrary coupling coefficient is proposed and investigated in this paper. The coupler has a simple structure and can realize a wide range of the same coupling coefficient over two designated frequencies. The mathematical design formula is also developed, which not only provides a straightforward design procedure, but also reveals the attractive features of the proposed coupler, including: 1) the same coupling coefficient in the dual frequency bands; 2) the sole dependence of a coupling coefficient on the ratio of the impedances of even and odd modes; and 3) a large range of the ratio of the dual frequencies. Two prototypes of the proposed couplers, one operating at 2.4/5.8 GHz with a - 10-dB coupling coefficient and the other working at 0.9/1.8 GHz with a - 15-dB coupling coefficient, have been designed, fabricated, and measured. The measured results demonstrate that the bandwidths for the 2.4- and 5.8-GHz bands are 22% and 19.8%, respectively, and that for the 0.9- and 1.8-GHz bands are 28.4% and 15.8%, respectively. Good correlation between the measured results and those of the theoretically designed justifies the proposed coupler circuit and the design theory.
著者Wang X, Yin WY, Wu KL
期刊名稱IEEE Transactions on Microwave Theory and Techniques
出版年份2012
月份4
日期1
卷號60
期次4
出版社Institute of Electrical and Electronics Engineers (IEEE)
頁次945 - 951
國際標準期刊號0018-9480
電子國際標準期刊號1557-9670
語言英式英語
關鍵詞Arbitrary coupling coefficient; coupled-line coupler; dual band
Web of Science 學科類別Engineering; Engineering, Electrical & Electronic; ENGINEERING, ELECTRICAL & ELECTRONIC

上次更新時間 2020-24-11 於 00:30