Apparatus for minimizing electromagnetic coupling between surface mount device inductors

A radiofrequency module, comprising:

• a printed circuit board including a substrate layer;
• and
• one or more surface mount device inductors mounted on the substrate layer, each surface mount device inductor including:
• an inductor coil configured to generate a magnetic field along an axis when a current is applied to the inductor coil;
• an anode structure having a box-like shape with a top wall, a bottom wall, a left-side wall, a right-side wall and an end wall that at least partially encloses a first end of the inductor coil, the top wall disposed over at least a portion of the inductor coil;
• and a cathode structure having a box-like shape with a top wall, a bottom wall, a left-side wall, a right-side wall and an end wall that at least partially encloses a second end of the inductor coil opposite the first end, the top wall of the cathode structure disposed over at least another portion of the inductor coil, the cathode structure being spaced apart from the anode structure, the anode structure and the cathode structure including a shield portion disposed at least partially over the inductor coil to thereby reduce electromagnetic coupling, the shield portion of the anode structure and the cathode structure including the top wall thereof and a first portion of the left-side wall and of the right-side wall thereof that extends from the top wall to a location between the top wall and the bottom wall thereof, a second portion of the left-side wall and of the right-side wall thereof that is adjacent the end wall thereof extending from the top wall to the bottom wall thereof.

A wireless mobile device comprising:

• one or more antennas;
• and
• a front end system that communicates with the one or more antennas, the front end system including one or more surface mount device inductors mounted on a substrate layer, each surface mount device inductor including:
• an inductor coil configured to generate a magnetic field along an axis when a current is applied to the inductor coil;
• an anode structure having a box-like shape with a top wall, a bottom wall, a left-side wall, a right-side wall and an end wall that at least partially encloses a first end of the inductor coil;
• and a cathode structure having a box-like shape with a top wall, a bottom wall, a left-side wall, a right-side wall and an end wall that at least partially encloses a second end of the inductor coil opposite the first end, the top wall of the cathode structure disposed over at least another portion of the inductor coil, the cathode structure being spaced apart from the anode structure, the anode structure and the cathode structure including a shield portion disposed at least partially over the inductor coil to thereby reduce electromagnetic coupling, the shield portion of the anode structure and the cathode structure including the top wall thereof and a first portion of the left-side wall and of the right-side wall thereof that extends from the top wall to a location between the top wall and the bottom wall thereof, a second portion of the left-side wall and of the right-side wall thereof that is adjacent the end wall thereof extending from the top wall to the bottom wall thereof.