標題: Miniaturized Dual-Band Hybrid Couplers With Arbitrary Power Division Ratios
作者: Hsu, Ching-Luh
Kuo, Jen-Tsai
Chang, Chin-Wei
電信工程研究所
Institute of Communications Engineering
關鍵字: Branch-line coupler;dual band;miniaturization;rat-race coupler;stepped impedance
公開日期: 1-一月-2009
摘要: Branch-line and rat-race couplers are designed to have dual-band operation with arbitrary power division ratios. An elementary two-port is proposed to imitate the 90 degrees section at the two designated frequencies with different characteristic impedances. The two-port consists of a stepped-impedance section with open stubs attached to its two ends, and its circuit parameters are determined by the transmission line theory. The use of the stepped-impedance sections also leads to circuit miniaturization. By the standard microstrip technology., investigated also includes the realizable power division ratios and circuit bandwidths in the two bands, the upper limit of the ratio of the two designated frequencies and the miniaturization factor of the proposed circuit. Hybrid couplers operating at 2.45/5.2 GHz with various power division ratios are designed, fabricated and tested. Experiment results are compared with the theory and simulation.
URI: http://dx.doi.org/10.1109/TMTT.2008.2009036
http://hdl.handle.net/11536/7785
ISSN: 0018-9480
DOI: 10.1109/TMTT.2008.2009036
期刊: IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume: 57
Issue: 1
起始頁: 149
結束頁: 156
顯示於類別:期刊論文


文件中的檔案:

  1. 000262429300017.pdf