A G-Band Four-Element Butler Matrix in 0.13 µm SiGe BiCMOS Technology. - Mohamed Elkhouly; Yanfei Mao; Chafik Meliani; Johann-Christoph Scheytt; Frank Ellinger (IEEE J. Solid State Circuits, 2014)

245 GHz subharmonic receivers for gas spectroscopy in SiGe BiCMOS technology - Yanfei Mao (2014)