High-frequency waveguide, phase shifter and radiator using the same, electronic device using the phase shifter and radiator, antenna device, and electronic device including the same

摘要

This high-frequency waveguide is formed by first and second conductors (22, 23) disposed opposite each other at a spacing of » 0 /2, where » 0 is the free space wavelength of the operating frequency of a high-frequency signal. A ridge (25) is provided at the waveguide formation portion between these first and second conductors (22, 23), which protrudes from one of the first and second conductors (22, 23) toward the other and is formed extending along the waveguide formation portion. A plurality of columnar protrusions (24) with a height of » 0 /4 are disposed at a spacing of less than » 0 /2 to at least one of the first and second conductors (22, 23) on the outside of the waveguide formation portion and to the outside of the ridge (25).