Patent ID: 7626473
Filing Date: 2009-12-01
Classification: H01P

Abstract:
1. A signal transmission line for a millimeter-wave band, comprising: a dielectric substrate; an input line disposed on the dielectric substrate, the input line having a first end and a second end along a first direction, the input line being configured to receive a millimeter-wave signal at the first end and output the millimeter-wave signal at the second end; a first serial transmission line disposed on the dielectric substrate and spaced apart from the second end of the input line along the first direction, the first serial transmission line being sufficiently close to the second end of the input line to be electromagnetically coupled in series to the second end of the input line; a second serial transmission line disposed on the dielectric substrate and spaced apart from the second end of the input line along the first direction, the second serial transmission line being sufficiently close to the second end of the input line to be electromagnetically coupled in series to the second end of the input line, the second serial transmission line being spaced apart from the first serial transmission line along a second direction that is orthogonal to the first direction; a first parallel transmission line disposed on the dielectric substrate and spaced apart from the second end of the input line and the first serial transmission line along the second direction, the first parallel transmission line being sufficiently close to the second end of the input line and the first serial transmission line to be electromagnetically coupled to the second end of the input line and the first serial transmission line; a second parallel transmission line formed on the dielectric substrate and spaced apart from the second end of the input line and the second serial transmission line along the second direction, the second parallel transmission line being sufficiently close to the second end of the input line and the second serial transmission line to be electromagnetically coupled to the second end of the input line and the second serial transmission line; a first wire connecting the first serial transmission line to a connection pad of a monolithic microwave integrated circuit (MMIC); and a second wire connecting the second serial transmission line to the connection pad of the MMIC.