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

MONOPULSE ANTENNAS WITH DOUBLY CURVED REFLECTORS Anton Brunner and Erwin Kress ABSTRACT Doubly curved reflector antennas produce different crosspolarization components in the different directions of elevation because of the reflector's curvature. In an one-plane monopulse system often used in the secondary radar case the cross-polarized components fill up the central null in the difference pat

ONE-HYBRID-MODE FEED WITH HIGH APERTURE EFFICIENCY AND LOW SPILL-OVER V.J. Vokurka A new class of one-hybrid-mode primary focus feed with high aperture efficiency and low spill-over is described. These antennas are suitable for use in deep parabolic reflectors (F/D<0.35). The propagation characteristics in the horn and far field radiation pattern are derived. The antenna efficiency and spill-o

OPTIMIZATION OF RELEVANT PARAMETERS OF ANTENNAS WITH SURFACE AND FIELD IRREGULARITIES Giovanni d'Auria, Stefano Marini, and Domenico Solimini ABSTRACT The paper parameters and tenna cess kind the the and of the incoming is considered. involved. of study ratio latter /n The are presents field The antenna discussed. a numerical the random into procedure account. to optimize A circular

ON THE EVALUATION ANTENNAS OF IMAGE REGION FIELDS FOR DUAL REFLECTOR SCANNING B. Claydon and G.L. James ABSTRACT Evaluation of the field from dual reflector scanning antennas using the physical optics approximation is impractical when the main reflector is large. Asymptotically evaluating the physical optics integral yields the geometrical optics field as the first term in the solution.