Patent ID: 8704611
Filing Date: 2014-04-22
Classification: H03H

Abstract:
1. A constant-resistance hybrid filter comprising: sum, low-pass, high-pass, and intermediate nodes; an impedance coupling the intermediate node to a circuit ground; a first low-pass network coupling the sum node to the low-pass node; a first high-pass network coupling the sum node to the high-pass node; a second low-pass network coupling the high-pass node to the intermediate node; and a second high-pass network coupling the low-pass node to the intermediate node, the second high-pass network including a first capacitor connected to the low-pass node, a second capacitor connected to the intermediate node, and a coupling network connecting the first capacitor to the second capacitor; the coupling network including a first electromagnetic coupler section comprising at least a first inductance electrically in series with the first capacitor and the second capacitor, a first capacitance coupling the first capacitor to circuit ground, and a second capacitance coupling the second capacitor to circuit ground.