A COMPACT TRANSMISSION LINE WITH DUAL-BAND FILTER CHARACTERISTICS USING A CRLH METAMATERIAL

作者：Wang Yang; Yoon Ki Cheol; Lee Jong Chul^*

来源：Microwave and Optical Technology Letters, 2014, 56(9): 2150-2153.

DOI：10.1002/mop.28546

• composite right/left handed
• transmission line
• quarter-wavelength
• dual-band
• nonlinear propagation constant

In this article, a size-reduced dual band-pass transmission line (TL) with a composite right/left handed (CRLH) shunt-stub is presented. It uses a T-shaped quarter-wavelength TL, which shows dual band-pass characteristics, when the electrical length is +n lambda/4 or -n lambda/4, where n is odd integer. These wavelengths can be achieved at arbitrary frequencies by the CRLH-TL with the property of a nonlinear beta versus omega. The phase delay at the two operating frequencies can be adjusted by designing the series TL part, identical to the case of a conventional TL. The performance of this TL is demonstrated in both simulations and measurements, which show good agreement, exhibiting insertion losses of 0.32 and 0.98 dB at the two operating frequencies, respectively. Also, the phase response difference was determined to be 180 degrees at these frequencies. The size of the proposed TL is 16 x 19 mm(2).

• 出版日期2014-9