收稿日期: 2009-03-26
修回日期: 2009-10-31
网络出版日期: 2010-05-25
基金资助
国家自然科学基金资助项目(U0635004) 国家自然科学青年基金资助项目(60801033)
Dual-Band Broadband Coupler with SIR Branches
Received date: 2009-03-26
Revised date: 2009-10-31
Online published: 2010-05-25
Supported by
国家自然科学基金资助项目(U0635004) 国家自然科学青年基金资助项目(60801033)
褚庆昕 杨琳 林峰 . 基于SIR结构的双频宽带耦合器[J]. 华南理工大学学报(自然科学版), 2010 , 38(5) : 51 -54,70 . DOI: 10.3969/j.issn.1000-565X.2010.05.010
As the conventional dual-band coupler is of narrow operation band,this paper presents a novel design method of dual-band broadband branch-line coupler based on stepped impedance resonator(SIR).With this method,both the location of resonate frequencies and the bandwidth of the coupler can be adjusted in the lower and upper frequency bands.A dual-band broadband 3-dB coupler operating at 2.20/5.50GHz is also designed and fabricated,which covers not only the 1.80GHz GSM band and but also the 2.45/5.25/5.80GHz WLAN bands.The measured results accord well with the simulated ones,meaning that the proposed design method is feasible.
Key words: branch-line coupler; stepped impedance resonator; dual band; broadband
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