Double loop output system for magnetron

A microwave source, comprising:

• a magnetron having an anode ring concentrically disposed around and spaced from a cathode, said anode ring further comprising a plurality of anode vanes extending radially inward from said anode ring with cavities being defined between adjacent ones of the plurality of anode vanes, one of said plurality of anode vanes providing an output vane whereby a high power microwave signal is developed in first and second output cavities disposed at opposite sides of said output vane, said output vane further comprising an opening at a central portion thereof;
• and
• an output circuit coupled to said magnetron, said output circuit comprising a coaxial transmission line including first and second coupling loops disposed in said first and second output cavities, respectively, and electrically terminated to said anode ring, said first and second coupling loops sharing a common central portion that extends through said opening of said output vane without contacting said output vane, said common central portion extending outwardly of said anode ring to permit communication of said high power microwave signal therefrom, whereby said common central portion sums together an undesired mode of oscillation received by said first and second coupling loops and thereby damps said undesired mode of oscillation, wherein said outer body portion further comprises a first pair of opposed notches disposed at an end thereof that engages said corresponding opening of said anode ring, said first pair of opposed notches being adapted to engage end portions of said output vane and provide alignment thereto.