SLIDE 8 BEAMED RF POWER TECHNOLOGY SLOTTED WAVEGUIDE RADIATORS BANDWIDTHS THE RESONANT, SLOTTED WAVEGUIDE ARRAY MAY POTENTIALLY BE A FILTER FOR WIDEBAND NOISE AROUND THE 2.45 GHz FUNDAMENTAL. A COLLECTION OF IMPEDANCE BANDWIDTH DATA FOR VARIOUS SLOTTED WAVEGUIDE RADIATORS FROM JPL, BOEING AND RAYTHEON MANUFACTURE ARE SHOWN. RATHER NARROW BANDWIDTHS ARE ACHIEVABLE, BUT THEIR PRACTICALITYCLONG TERM STABILITY, REPEATIBILITY AND ACCURACY OF MANUFACTURE AND POWER HANDLING CAPABILITY) REMAINS TO BE DEMONSTRATED FOR USE AS ADDITIONAL FILTERING OF THE SPS TRANSMITTERS AT THE ISM BAND EDGE. IT SHOULD BE NOTED THAT A DIFFERENT IMPEDANCE-MATCH TUNING OF THE 8 x 8 ARRAY YIELDS A LESS THAN 1.5:1 VSWR (RETURN LOSS OF -14 dB) OVER THE ENTIRE 100 MHz WIDE ISM BANDWIDTH (0.98 TO 1.02 IN NORMALIZED FREQUENCY).
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