COUPLER

摘要

A coupler having a high degree of coupling. The coupler comprises first and second dielectric substrates (141, 142) having mutually-parallel first and second surfaces, a ground conductor (103) formed on the first surface of the first dielectric substrate (141), and two coupling line conductors (120, 121) formed closely to each other to couple electromagnetically with each other on the second surface of the second dielectric substrate (142). Since via conductors (150-163, 170-183) filling through holes penetrating the second dielectric substrate are arranged on the two coupling line conductors (120, 121) while being connected to increase the degree of mutual electromagnetic coupling, facing area between the coupling line conductors (120, 121) is increased thus increasing the capacitance.