High power microwave load

Claim 1

A HIGH POWER MICROWAVE LOAD COMPRISING IN COMBINATION, (A) AN AXIALLY EXTENDING METAL WAVEGUIDE OF A RECTANGULAR CROSS SECTION HAVING AN INPUT END AND A TERMINATING END, (B) SAID WAVEGUIDE HAVING TOP AND BOTTOM WALLS DEFINING A WIDTH DIMENSION AND END WALLS DEFINING A THICKNESS DIMENSION, (C) THE SAID WIDTH DIMENSION BEING SUFFICIENT TO REDUCE TRANSVERSE CURRENTS TO A PREDETERMINED LOW LEVEL, (D) THE SAID WAVEGUIDE TAPERING FROM A LARGER WIDTH DIMENSION AT ITS INPUT END TO A MINIMUM WIDTH DIMENSION AT ITS TERMINATING END AT A PREDETERMINED RATE, (E) OPPOSITELY DISPOSED R.-F. POWER ABSORBING MEANS COMMENCING AT PREDETERMINED LOCATIONS AT SAID WAVEGUIDE INLET AND EXTENDING AXIALLY ALONG AND ADJACENT SAID SIDEWALLS, (F) THE LATERAL DISTANCE BETWEEN SAID ABSORBING MEANS BEING SUBSTANTIALLY GREATER THAN SAID THICKNESS DIMENSION AND SUFFICIENTLY LARGE SO THAT SAID ABSORBING MEANS ARE SUBJECTED ONLY TO SAID LOW LEVEL TRANSVERSE CURRENT, (G) THE COMMENCING ENDS OF SAID ABSORBING MEANS BEING SPACED APART IN THE AXIAL DIRECTION A DISTANCE ABOUT A QUARTER GUIDE WAVELENGTH, (H) MEANS TO PASS R.-F. POWER INTO SAID WAVEGUIDE, AND (I) CHANNEL MEANS IN SAID WAVEGUIDE ADJACENT SAID ABSORBER FOR CIRCULATION OF A COOLANT THERETHROUGH SO THAT SAID R.-F. POWER PASSING THROUGH SAID ABSORBER IS CONVERTED TO HEAT ENERGY IN SAID COOLANT, (J) SAID ABSORBING MEANS HAVING CONSTANT DIMENSIONS OVER THE LENGTH THEREOF EXTENDING FROM SAID INPUT END TO SAID TERMINATING END OF SAID WAVEGUIDE, (K) SAID COOLANT CIRCULATING ALONG ONE SIDE OF SAID WAVEGUIDE FROM SAID INLET END TO SAID TERMINATING END, AND ALONG AN OPPOSITE SIDE OF SAID WAVEGUIDE FROM SAID TERMINATING END TO SAID INLET END.