Patent ID: 8729983

Claim:
A resonance coupler for wireless transmission of a high frequency signal between a first transmission line and a second transmission line, the resonance coupler comprising: the first transmission line including, on a first plane, first resonant wiring having an open loop shape having an opening, first input/output wiring connected to the first resonant wiring, and second input/output wiring connected to the first resonant wiring; and the second transmission line including, on a second plane facing the first plane, second resonant wiring, third input/output wiring connected to the second resonant wiring, and fourth input/output wiring connected to the second resonant wiring, the second resonant wiring having a same wiring width and shape as a wiring width and shape of the first resonant wiring, wherein a first grounding point provided on the first resonant wiring is connected to first ground wiring indicating a reference potential of the high frequency signal in the first transmission line, the first grounding point provided between a connection point of the first input/output wiring to the first resonant wiring and a connection point of the second input/output wiring to the first resonant wiring, a second grounding point provided on the second resonant wiring is connected to second ground wiring indicating a reference potential of the high frequency signal in the second transmission line, the second grounding point provided between a connection point of the third input/output wiring to the second resonant wiring and a connection point of the fourth input/output wiring to the second resonant wiring, and the first transmission line and the second transmission line are provided facing each other and, when viewed in a direction perpendicular to the first plane, the first resonant wiring and the second resonant wiring have matching contours and are symmetric about a point.