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Tunable Dual-Band Microwave Devices based on a Combination of Left/Right-Handed Transmission Lines

Tunable Dual-Band Microwave Devices based on a Combination of Left/Right-Handed Transmission Lines,10.1109/EUMC.2008.4751441,Irina Vendik,Dmitry Kholo

Tunable Dual-Band Microwave Devices based on a Combination of Left/Right-Handed Transmission Lines   (Citations: 5)
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Metamaterial transmission lines can be realized as a combination of transmission line sections with positive and negative dispersion. Such lines, which are also known as right- and left-handed transmission lines, exhibit different dispersion characteristics. Compared to homogeneous networks, the use of cascaded line sections gives additional degrees of freedom for improving the performance of microwave devices. For the design process, LC-equivalents of the right- and left-handed transmission line sections are used. This facilitates the consideration of tunable capacitors, e.g., varactor diodes, to provide frequency tuning of the devices. At the same time, the geometrical dimensions of the devices can be drastically reduced. This paper presents the results of simulation and experimental investigation of a miniature rat-race-ring and a dual-band filter free of spurious response, both manufactured as fully-integrated ceramic multilayer modules based on Low-Temperature Co-fired Ceramics. The design of tunable versions of these devices is also discussed.
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