Patent ID: 7986199

Claim:
A band pass filter suitable for being formed in a multi-layered circuit substrate of a wireless communication module, the band pass filter comprising a plurality of patterned conducting layers sequentially and spacingly arranged in a stack, the patterned conducting layers comprising: a first patterned conducting layer comprising an input port; a second patterned conducting layer comprising a first plane coil, a first inner electrode, and a first ground plane, the first ground plane having a first opening, the first plane coil being positioned within the first opening and electrically connected in series between the input port and the first inner electrode; a third patterned conducting layer comprising a second inner electrode, the second inner electrode being positioned above the first inner electrode to form a first capacitor; a fourth patterned conducting layer comprising a second plane coil, a third inner electrode, and a second ground plane, the second ground plane having a second opening, the third inner electrode being positioned within the second opening and electrically connected to the second inner electrode, the second plane coil being positioned within the second opening and electrically connected to the third inner electrode; a fifth patterned conducting layer comprising a third plane coil, a fourth inner electrode, and a third ground plane, the third ground plane being electrically connected to the second plane coil and having a third opening positioned above the second opening, the fourth inner electrode being positioned within the third opening and above the third inner electrode to form a second capacitor, the third plane coil being positioned within the third opening and electrically connected to the fourth inner electrode; and a sixth patterned conducting layer comprising an output port, the output port being electrically connected to the third plane coil.