Transmission line and antenna device

Abstract

A transmission line has a triplate line including a first outer conductor and a second outer conductor disposed in parallel with each other at a predetermined interval, and a central conductor disposed in a space between the first outer conductor and the second outer conductor; and a dielectric spacer interposed between the first and second outer conductors and the central conductor and configured to support the central conductor. The central conductor has a supported portion supported by the dielectric spacer, and first and second high-impedance portions having characteristic impedances higher than a characteristic impedance in the supported portion. The first and second high-impedance portions are disposed on input and output sides, respectively, of the supported portion.

Dependencies are inferred from the claim text.