Spectrum analyzer employing velocity modulation
阅读：842发布：2022-01-14
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1. MICROWAVE SPECTRUM ANALYZER APPARATUS COMPRISING A CATHODE RAY TUBE ENVELOPE, AN ELECTRON BEAM GUN IN SAID ENVELOPE, A VELOCITY MODULATION STRUCTURE ARRANGED TO VELOCITY MODULATE THE BEAM FROM SAID GUN IN ACCORDANCE WITH AN INPUT SIGNAL, MEANS FOR LIMITING THE FREQUENCY BANDWIDTH OF THE SIGNAL MODULATING SAID BEAM TO A RELATIVELY NARROW BAND OF FREQUENCIES SELECTED FROM THE RELATIVELY WIDER RANGE OF OPERATING FREQUENCIES OF SAID APPARATUS, MEANS FOR PRODUCING A SUBSTANTIALLY UNIDIRECTIONAL ELECTRIC FIELD IN A FIRST DIRECTION ACROSS SAID VELOCITY MODULATABLE BEAM, MEANS FOR PRODUCING A SUBSTANTIALLY UNIDIRECTIONAL MAGNETIC FIELD ACROSS SAID VELOCITY MODULATABLE BEAM SUBSTANTIALLY PERPENDICULAR TO SAID ELECTRIC FIELD, THE MAGNITUDES OF SAID ELECTRIC AND MAGNETIC FIELDS BEING RELATED TO PRODUCE SUBSTANTIALLY EQUAL AND OPPOSTIE DEFLECTING FORCES ON SAID BEAM AT ITS NON-MODULATED VELOCITY BUT TO PRODUCE SUBSTANTIAL UNBALANCED DEFLECTION FORCES FOR VELOCITIES DEPARTING FROM SAID NON-MODULATED VELOCITY, MEANS FOR INDEPENDENTLY DEFLECTING SAID BEAM IN RESPONSE TO A DEFLECTION SIGNAL IN A DIRECTION PERPENDICULAR TO SAID ELECTRIC FIELD FORCES, MEANS FOR SUPPLYING A RADIO FREQUENCY SIGNAL TO BE ANALYZED TO SAID VELOCITY MODULATION STRUCTURE, MEANS FOR TUNING SAID BANDWIDTH LIMITED MEANS THROUGH A RANGE OF FREQUENCIES WITH RESPECT TO WHICH SAID RADIO FREQUENCY SIGNAL IS TO BE ANALYZED, AND MEANS FOR PROVIDING A DEFLECTING SIGNAL TO THE LAST DEFLECTING MEANS.
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