STUB ELEMENT FOR MICROWAVE INTEGRATED CIRCUIT AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To adjust a fitting position and length after arrangement by constituting a short stub element where one end of a center conductor is connected to a signal transmission line and the other end to ground through a capacitor and an open stub element which has same constitution and releases the other end on a substrate through the use of a coaxial line. SOLUTION: The short stub S11 in which the periphery of the center conductor 21 is covered by a dielectric 22, the periphery is shielded by conductive shielding 23 and which is formed of the coaxial line 20 of length L11 is provided for the point of a distance d11 from the input terminal 12 of the signal transmission line 11 of a metal pattern provided for the upper face of a levelite [phonetic] substrate 10 whose back face is set to be a ground face. One end of the center conductor is connected to the signal transmission line 11 and the other end to a chip capacitor 25. The open stub S12 constituted of the coaxial line 30 of L12 is connected to the signal transmission line 1 and the other end is set to be open. Thus, the fitting position and length can finely be adjusted and the degree of freedom can considerably be improved.