Line coupling structure, mixer, and receiving/transmitting apparatus

摘要

A line coupling structure for coupling a dielectric waveguide to a suspended line has the dielectric waveguide including dielectric strips (31a,31b) and two conductor plates (1,2) that are approximately parallel to each other, the dielectric strips (31a,31b) and a circuit board (4) being sandwiched between the conductor plates (1,2). The line coupling structure also has the suspended line including the conductor plates (1,2) and a conductor pattern (51) on the circuit board. The conductor pattern is arranged in a direction that is substantially perpendicular to the dielectric strips (31a,31b). A protruding conductor pattern (52) that extends in the extending direction of the dielectric strips is provided at a crossing position of the conductor pattern (51) and the dielectric strips (31a,31b).