Two-tiered tuned filter

A reduced length tuned filter, comprising:

• a housing having a female connector end and an opposed male connector end;
• a circuit board positioned within said housing and having a first end proximate said female connector end and an opposed second end proximate said male connector end, said circuit board having a first filter section positioned on an upper surface thereof, a second filter section positioned on a lower surface thereof, and a ground plane positioned between said upper and lower surfaces, wherein said first filter section is in electrical communication with said second filter section, and each filter section comprises at least one tunable coil;
• an input terminal connected to said first end of said circuit board and extending within said female connector end of said housing;
• an output terminal connected to said second end of said circuit board and extending within said male connector end of said filter housing;
• a first isolation shield in electrical communication with said ground plane, said first isolation shield extending from said upper surface of said circuit board in a direction substantially perpendicular thereto and proximate one of said first and second ends of said circuit board;
• and
• a second isolation shield in electrical communication with said ground plane, said second isolation shield extending from said lower surface of said circuit board in a direction substantially perpendicular thereto and proximate the other one of said first and second ends of said circuit board.