A Very Wideband Filter-Amplifier Based on Composite Right/Left-Handed Transmission Lines Loaded With RTD

The composite right/left-handed (CRLH) transmission line (TL) is presented as a general TL possessing both left-handed (LH) and right-handed (RH) natures. RH materials have both positive permittivity and positive permeability, and LH materials have both negative permittivity and negative permeability. This paper aims to design and analyze nonlinear CRLH-TL transmission line loaded with Resonant Tunneling Diode (RTD). The main application of this design is very wideband and compact filter that amplify the travelling signal. We used OrCAD and ADS software to analyse the proposed circuit. CRLH-TL based on the hybrid approach, where a microstrip line is loaded with complementary split-rings resonators (CSRRs), series gaps, and shunt inductor. The RTD is connected parallel to shunt inductor. The designed structure posses a wide band goes from 5-10.5 GHz and amplified signal up to 50 percent. The proposed design is of interest to microwave compact component designers.