LASER AMPLIFICATION BY ELECTRON BEAMS. A. H. Beck >:< and Po Chung. + ABSTRACT. This paper describes a klystron amplifier designed to operate at optical frequencies. The theory of the interaction between light waves constrained by thin, rectangular light guides and transverse electron beams is considered. The electron beams are shown to be velocity modulated at emergence from the intense

COMPUTER OPTIMIZATION OF BROAD-BAND TUNABLE LOADS Mart Altmae and Lars Sander ABSTRACT ' Numerical optimization is used to design broad-band tunable circuits, with a given reflection coefficient. The design of a varactor tuned Gunn oscillator serves as an example of this approach. Constraints on the variables are given as bounds for realizability, specifications on the tuning variable an

SIMPLIFIED BY USE OF APPROACH TO SENSITIVITY PARAMETERS OPTIMIZATION SCATTERING G. Epprecht C. Rauscher, ABSTRACT The optimal immunization of a microwave network against parameter tolerances can be achieved more simply than by a "worst case" approach if certain sacrifices in final conclusiveness are accepted. The paper describes such a simplified procedure and discusses some practical aspec

COMPUTER SIMULATION OF SWITCHING IN MICROWAVE PIN DIODES M.D. ProfiresGu* Abstract Computer simulations have been carried out of switching behaviour and design optimization of microwave PIN structures used in millimetre-wave communications. The simulation operates in the time domain and uses an implicit iterative method to obtain the internal distributions and terminal response of PIN diodes

SIMULTANEOUS INPUT POWEH MATCH AND NOISE OPTIMIZATION USING FEEDBACK. Jakob Engberg. AllSTRACT: A method is presented for the design of an input stage such that the input admittance is the optimum for minimum noise conditions. Furthermore, this condition can be obtained for almost any chosen passive load. This has been achieved by means of 2 lossless feedback elements in a shunt and series c

COMPUTER DESIGN OF EFFICIENT J.B.DAVIES, O.J. DAVIES, TEOl CIRCULAR WAVEGUIDE TRANSDUCERS and S.S.SAAD Abstract Various new techniques are described for the analysis and design optimization of gradually tapered waveguide mode transducers. Some of these are applicable to a broad range of transducers, couplers, etc., but the work describes particular application to a mode transducer for use in T



A TECHNIQUE LINES WITH FOR COMPUTING THE APPLICATION R. MITTRA DISPERSION CHARACTERISTICS PROBLEMS OF SHIELDED MICROS TRIP TO THE JUNCTION T. ITOH AND ABSTRACT The problem of computing the dispersion characteristics of shielded micros trip lines is studied using Galerkin's method employed in the Fourier transform domain. Numerical results are compared with other available data and experime

COMPARISON BETWEEN GEOMETRICAL THEORY OF DIFFRACTION AND ELECTROMAGNETIC THEORY FOR THE STUDY OF THE NEAR FIELD Paul Fran~o1s . OF A CIRCULAR APERTURE COMBES + ABSTRACT: You will find in the theoretical part (& II) of this paper, the formulas obtained by the geometrical theory of diffraction (G.T.D.) which allow to calculate the electric field in the near zone of a circular aperture. The numer

MONOPULSE AERIALS FOR AIRBORNE RADARS R. Graham. M. F. Doyle. S. J. Alexander. ABSTRACT The paper begins by summarising the characteristics of a number of monopulse aerials applicable to airborne radar. For such a use, it is often important that the aerial has low side lobes. Good sidelobe performance may be obtained with a flat plate array which can have an accurately controlled aperture d