STRIP STUB DIRECTIONAL COUPLER Russian patent published in 1995 - IPC

FIELD: SHF equipment. SUBSTANCE: strip stub directional coupler includes two transmission lines connected by central stub of quarter-wavelength. Side structures each produced in the form of mounted inductive element which leads are coupled to transmission lines by means of sections of transmission line are positioned on both sides of central stub at distance equal to quarter-wavelength. Mounted inductive element is fabricated in the form of coil and sections of transmission line are arranged on opposite sides of transmission line. Central stub can be bent in the form of square. Sections of transmission line in side structures have impedance and width of strip suitable for their unimpeded realization in strip make. Occupying area of substrate not greater than square bridge proposed device has working band of frequencies not worse than three-stub directional coupler. EFFECT: increased operational characteristics. 2 cl, 5 dwg