High frequency filter device and related methods

A filter device comprising:

• a plurality of ferrite filters laminated together in vertically stacked relation, each ferrite filter comprising a pair of ferrite layers laminated together in vertically stacked relation and a lateral conductor extending therebetween;
• and
• at least one vertical conductor connecting said lateral conductors together in series;
• at least one of said ferrite filters comprising iron deficient zinc ferrite, and at least one other of said ferrite filters comprising copper nickel zinc ferrite.

A method for making a filter device comprising:

• arranging a plurality of ferrite layers in vertically stacked relation with a respective lateral conductor extending between adjacent pairs of ferrite layers;
• connecting the lateral conductors in series using at least one vertical conductor;
• and
• laminating the plurality of ferrite layers together such that each adjacent pair of ferrite layers and respective lateral conductor defines a ferrite filter, and at least some of the ferrite filters having different operating characteristics.