Assessment of a Composite Right/Left-Handed Transmission Line-based Distributed Amplifier implemented in microstrip technology

The use of composite right/left-handed transmission lines (CRLH TLs) in the design of active distributed circuits such as distributed amplifiers or distributed mixers has led to potential new applications for these kinds of microwave circuits. In particular, CRLH TL-based distributed amplifiers (DAs), which exhibit multiband amplification performance, have recently been proposed by the authors. In this paper a microstrip implementation of CRLH TL-based DAs is proposed and discussed. The proposed implementation allows for the biasing of the active devices without degrading RF performance. Preliminary simulated results suggest that these new distributed amplifiers can be implemented in microstrip technology without deteriorating their intrinsic multiband amplification performance