Arbitrarily dual-band components using simplified structures of conventional CRLH TLs

作者：Lin Xian Qi^*; Liu Ruo Peng; Yang Xin Mi; Chen Ji Xin; Yin Xiao Xing; Cheng Qiang; Cui Tie Jun

来源：IEEE Transactions on Microwave Theory and Techniques, 2006, 54(7): 2902-2909.

DOI：10.1109/TMTT.2006.877434

• branch-line coupler
• composite right/left-handed (CRLH) structure
• dual band
• nonlinear phase response
• transmission line (TL)

Microwave components with nonlinear phase responses are developed using a simplified composite right/left-handed (CRLH) transmission-line (TL) structure without the series capacitance or the shunt inductance. Using such a simplified CRLH structure, arbitrarily dual-band microstrip components have been realized in compact sizes such as a quarter-wavelength short-circuited stub and dual- band branch-line couplers. Simulation and measurement results are given to demonstrate the efficiency and good performance of the proposed components. For the quarter- wavelength short-circuited stub based on the simplified CRLH-TL structure without the series capacitance, it has been shown that the insertion loss is less than -0.1 dB. For the arbitrarily dual-band branch-line coupler, experiment results exhibit that S-21 and S-31 are larger than -3.6 dB, the isolations are smaller than -30 dB, the return losses are smaller than -20 dB, and the phase differences are within 90 degrees +/- 1.8 degrees.

• 出版日期2006-7
• 单位浙江大学; 东南大学