Patent ID: 6211751
Filing Date: 2001-04-03
Classification: H01P,H01Q

Abstract:
A balun comprising a plurality of balun components, each of which includes:a balanced line including a first conductor and a second conductor;a first microstrip center conductor connected to the first conductor of said balanced line; anda second microstrip center conductor connected to the second conductor of said balanced line for supplying the second conductor with a current with a phase opposite to a phase of a current flowing through the first conductor,wherein two phases of a radio wave fed to one of said balun components differ from two phases of a radio wave fed to another of said balun components, andwherein said one of said balun components comprises for its two microstrip center conductors two around plates facing each other, and said another of said balun components comprises for its two microstrip center conductors two ground plates facing each other and disposed alternately with said ground plates of said one of said balun components, and wherein the four ground plates adjacent to each other are connected by a conductor.