| 摘要 |
PROBLEM TO BE SOLVED: To provide a transmission line conversion part of a coaxial line and a microstrip line with which the coaxial line and the microstrip line formed on a multilayer dielectric substrate are converted and connected without using additional components such as substrate for mediation and in which impedance variation is reduced. SOLUTION: The transmission line conversion part is constituted such that flow of ground current of the microstrip line is sequentially switched from a conductor pattern on the rear surface to the respective conductor patterns formed in a plurality of internal layers of the multilayer dielectric substrate via through holes, the ground current flown to a conductor pattern 8e flows along a ground conductor pattern 8d via the through hole 9d from the ground conductor pattern 8e and the ground current flows further and sequentially via the through holes, respectively. Thus, the transmission line conversion part is constituted so as to flow the ground current by sequentially switching the ground for every one layer and parasitic reactance per through hole is reduced. COPYRIGHT: (C)2008,JPO&INPIT
|
