A Novel CPW Balanced Distributed Amplifier Using Broadband Impedance-Transforming MEMS Baluns

Abstract

-A novel balanced distributed amplifier (DA) was proposed using novel impedance transforming MEMS baluns. The impedance transforming MEMS balun is matched to 50Ω at one input port and 25Ω at two output ports. It is based on the electric field mode-change method, thus it is strongly independent of frequency and very compact. The novel balanced DA consists of two 25Ω-matched DAs and these are combined by 50Ω-to-25Ω baluns. Theoretically, it has two times wider bandwidth and power capability than the conventional DA. So as to verify the proposed concept, we designed and fabricated a conventional DA and the proposed one using 0.15-µm GaAs pHEMT technology.

Semi-lumped Balun Transformer using Coupled LC Resonators

“…Many RF circuit modules and systems adopt a balanced input and output in order to improve the dynamic range by reducing the noise and even order harmonics [1][2][3][4][5][6]. As these RF modules and systems advance to be become smaller, lighter, and multi-functional with better performance, they generate a strong need for compact sized wideband balun devices [3][4][5][7][8][9][10][11][12][13][14][15][16][17].…”