QUARTERLY PROGRESS REPORT NO. 3 FOR BASIC RESEARCH IN MICROWAVE DEVICES AND QUANTUM ELECTRONICS this report covers the period November 1, 1963 to February 1, 1964

摘要

An experimental low-frequency model of the frequency multiplier has been designed. A scheme of feedback to enhance the transfer effi¬ciency is included. The tube is in the final stage of assembly and alignment.nDifficulties in loading a helix designed to operate at 30 Gc into a BeO tube have not been fully resolved. Experimental data indicaues that a material having a higher resiliency than tungsten should be used for the helix.nThe analysis of the operation of the TWA with a multi-frequency input has been extended to account for the multivalued nature of the electron velocity in the beam. Boltzmann's transport equation is used to describe the kinematics of the electron beam.nA comprehensive study of the coupling mechanism between the various modes of operation of a d-c pumped transverse wave device has been made by means of the coupled-mode theory. Equations for the gain for the various modes and different pump fields are computed and compared.