AN ELECI'ROMAGNETICALL Y COUPLED ACTIVE FLAT PANEL ANTENNA FOR DBS RECEPTION Takao Murata. and Masaru Fujita. ABSTRACf An active flat panel antenna offers a number of advantages for DBS reception. In this paper, a newly developed electromagnetically coupled active flat panel antenna which provides electronic beam-tracking is presented.The features of the antenna are: l)series-parallel fed micros

ANNULAR FERRITE CIRCULATOR IN STRIPLINE TECHNOLOGY A J F Orlando, RHO Stumpf ABSTRACT A new type of ferrite circulator, with annular nucleus, in stripline technology, and operating under the saturating level of magnetization has been developed by means of a suitable model that makes use of Green's functions for generalized planar structures and ensures continuity of the boundary conditions

AN IMPROVED MULTI-LAYER QUADRATURE COUPLER FOR MMICs S Lucyszyn, I D Robertson * ABSTRACT A novel technique for significantly reducing the insertion loss of multi-layer quadrature couplers is presented. With previous broadside multi-layer couplers, realized on GaAs MMICs, the upper conducting layer track is overlayed exactly onto the much thinner lower conducting layer track resulting in a hi

A NEW IMPEDANCE TRANSFORMING INPHASE/ ANTIPHASE TRANSMISSION LINE FILTER AND ITS APPLICATION TO SOME MTCROWAVE COMPONENTS B. Mayer, ABSTRACT A new impedance transforming inphase/antiphase presented. The new filter is used to build a dual mixer, an image rejection mixer and a frequency results are given for the image rejection mixer frequency quadrupler at 2.25 GHz to 9 GHz. A achieved for both cir

BROADBAND INSET DIELECTRIC GUIDE COUPLER S. R. Pennock* O. Bo8kovic* T. Rozzit* ABSTRACT The inset dielectric guide (lOG) represents an easy-to-fabricate alternative to image line that is also less sensitive to loss by radiation at discontinuities. A multihole coupler has been realised showing a very flat coupling characteristic over a waveguide bandwidth. The frequency dependence of the p

Calcula~ioD of coupliDg co.ffici.D~. b8~"'D cylindrical di.l.c~ric r..OD8~or. u.ing fiDi~.-.l888D~ ..~ K. Noha8aad-~ah.ri * ABS!rRAC'J! A first degree one-dimensional finite-element analysis is used for the calculation of coupling coefficients between two dielectric resonator. placed axisymmetrically in a cylindrical tube. The method is veri simple. and can be applied for the design of diel

THE SCATTERING BEHAVIOUR OF AIR BRIDGES IN COPLANAR MMIC'S K. Beilenhoff. , W. Heinrich. , and H.L. Hartnagel . ABSTRACT The scattering behaviour of air bridges for coplanar monolithic microwave integrated circuits (MMIC's) is investigated using a three-dimensional Finite-Difference method (FDM). Results on the reflection parameters of the coplanar mode and the transmission parameters of the

A NEW MONOPlJLSE FOR INCREASED TRACKING FEED SYSTEM ACCURACY OF RADARS SUBIR GHOSH COM DEV. 155 Sheldon Drive. Cambridge. Ontario. NIR 7H6. Canada ABSTRACT This paper describes a new monopulse feed system that enhances the tracking accuracy and operating bandwidth of a space-fed radar. The feed comprises a compact 'mode triplexer' and a multimode corrugated horn. Signal strength of the two high

A NOVEL DISTANCE MAXIMUM-LIKELIHOOD CHANNELS AND MEASUREMENT ESTIMATOR WITH VERY HIGH IN RESOLUTION FOR MULTIPATH ITS APPLICATION ELECTROOPTICAL T. Zimmermann. ABSTRACT In order to determine the impulse response of a multi path channel one can probe the channel with an electromagnetic wave modulated by a spread spectrum signal. A novel maximum-likelihood estimator is presented which esti

Microwave reconstruction techniques based on numerical inversion of scattered e.m.field data by the method of moments s. Caorsi, G. L. Gragnani, and M. Pastorino. ABS1RACT A class of algorithms based on a space-domain integral-equation formulation is examined for the purpose of developing microwave imaging systems. Implications of the use of a complete inverse-scattering formulation are discusse