標題: Miniaturized Branch-Line Coupler with Coupling-Dependent Dual-Frequency Operation
作者: Chen, Tse-Yu
Chi, Pei-Ling
Lin, Ting-Tsan
資訊工程學系
Department of Computer Science
關鍵字: Branch-line coupler;coupled line;dual-band
公開日期: 2013
摘要: A miniaturized branch-line coupler that is able to operate at two arbitrary frequencies is presented in this paper. The dual-band frequency ratio depends on the coupling coefficient in the proposed transmission line element. It will be shown later that the dual-band separation decreases as the coupling strength increases. By replacing the traditional quarter-wavelength lines with the proposed artificial transmission lines of a prescribed coupling coefficient, a size-reduced branch-line coupler can be implemented at dual frequencies of interest. An example of the 0.9-and 1.8-GHz branch-line coupler, which corresponds to a band ratio of 2, is experimentally developed and characterized. The presented coupler occupies only 44% footprint of the conventional coupler operating at the lower frequency of the dual-band operation. Excellent agreement between the simulated and measured results is obtained.
URI: http://hdl.handle.net/11536/23705
ISBN: 978-1-4799-1472-2
期刊: 2013 ASIA-PACIFIC MICROWAVE CONFERENCE PROCEEDINGS (APMC 2013)
起始頁: 360
結束頁: 362
Appears in Collections:Conferences Paper