Patent ID: 6935002

Claim:
A method of manufacturing a nonreciprocal circuit device having characteristics such that attenuation is small in a direction of signal transmission and attenuation is large in a direction that is opposite to the direction of signal transmission and having matching capacitors disposed in signal input/output ports, said method comprising the steps of: forming said matching capacitors of single-board-type capacitors, each including a pair of capacitor electrodes formed on a dielectric substrate having two main surfaces and edges extending between said two main surfaces such that the pair of capacitor electrodes are formed on the respective entire main surfaces of the dielectric substrate with the dielectric substrate in between, so as to oppose each other; positioning said matching capacitors and a ground electrode in a housing; and positioning at least a long-side edge of an outer peripheral edge of said ground electrode, to which a cold side of one of said capacitor electrodes of the single-board-type capacitor is connected, inwardly from an outer peripheral edge of said cold side of said one of said capacitor electrodes so that a portion of the long-side edge of the outer peripheral edge of the ground electrode closest to a side of the housing does not contact the side of the housing.