A nonreciprocal circuit device including a metal case through which a high frequency current is difficult to flow, and a communication apparatus incorporating the nonreciprocal circuit device. The cross section of the metal case has a rectangular-frame shape formed by inwardly bending a substantially...http://www.google.es/patents/US6768392?utm_source=gb-gplus-sharePatente US6768392 - Nonreciprocal circuit device and communication apparatus incorporating the same
Nonreciprocal circuit device and communication apparatus incorporating the same
