Patent Number: 6,529,099

Title: 180.degree. phase shift circuit having an improved isolation characteristic

Abstract: A 180.degree. phase shift circuit includes a balun having an unbalancedport and a pair of balanced ports, a pair of impedance matching lines eachconnected between one of the pair of balanced ports and one of a pair ofbalanced signal terminals, and a .lambda.g/2 distributed parameter linehaving ends each connected via a resistor to a node connecting togethercorresponding impedance matching line and corresponding balanced signalterminal. The resistor has a resistance equal to 3/2 of the characteristicimpedance of the impedance matching lines

Inventors: Takenaka; Isao (Tokyo, JP)

Assignee:

International Classification: H01P 5/10 (20060101); H01P 009/00 ()

Expiration Date: 03/02015