Patent ID: 8472201

Claim:
A circuit module comprising: a circuit board; an isolator including a core isolator mounted on the circuit board, the core isolator including: a ferrite; a permanent magnet arranged to apply a direct-current magnetic field to the ferrite; a first center electrode disposed on the ferrite and having one end portion connected to an input port and the other end portion connected to an output port; and a second center electrode disposed on the ferrite so that the second center electrode crosses the first center electrode and is insulated from the first center electrode, the second center electrode having one end portion connected to the output port and the other end portion connected to a ground port; a plurality of electronic components mounted on the circuit board and arranged in a first straight line along with the core isolator; and a case disposed on the circuit board and covering the core isolator and the electronic components; wherein the isolator does not include a yoke for controlling the leakage of the direct-current magnetic field out of the isolator; the core isolator is interposed between the electronic components; and heights of the electronic components are greater than a height of the core isolator.