ERROR ANALYSIS IN FAST NEAR FIELD PROBING BY THE MODULATEDSCATTERING TECHNIQUE. X J.Ch. BOLOMEY, D. PICARD ABSTRACT This paper is devoted to the discussion of available measurement accuracies of linear arrays operating according to the modulated scattering technique. The combination of a fast electronic scanning on a line with a rotation of the antenna under test provides a substantial reductio

A CYLINDRICAL NEAR-FIELD TEST FACILITY FOR LARGE SATELLITE ANTENNAS C.-P. Fischer* ABSTRACT Due to severe environmental field measurement distances utilize in-door testing for a cylindrical near field test plemented. The principle of characteristics of the facility for the tests of the antenna constraints and the requirement for farup to several kilometres it is a necessity to modern spacec

CURRENT ANTENNA NEAR-FIELD INSTITUTE OF TECHNOLOGY MEASUREMENT RESEARCH AT THE GEORGIA Virginia V. Jory+, Edward B. Joy*, w. Marshall Leach, Jr.ll ABSTRACT Current progress in antenna near-field measurement techniques is presented. Emphasis is given to probe compensation for the spherical measurement system and to correction for probe position error in the planar measurement system. Also discus

ON THE RESEARCH OF NON RECIPROCAL FIN-LINE DEVICES S. TEDJINI* E. PIC* P. SAGUET* ABSTRACT In this paper, a semiconductor based fin-line isolator is analyzed. This device is based on field displacement effect phenomenon arising in a gyroelectric semiconductor (a theoretical method is presented). It is mainly an extension of the well known spectral domain approach. For this purpose, the semi

NONRECIPROCAL PROPAGATION CHARACTERISTICS OF SLOT LINES WITH DIELECTRIC-FERRITE G. DOUBLE LAYER SUBSTRATE Bock ABSTRACT The nonreciprocal propagation behaviour of slot lines with dielectric-ferrite double layer substrate with finite or infinite thin metal coating is analysed using the mode matching technique. The method is exact apart from numerical evaluation, where the infinite series have t

A UNIFIED EQUIVALENT CIRCUIT REPRESENTATION FOR H- AND E-PLANE CIRCULATORS JUNCTION U. Goebel, Ch. Schieblich * ABSTRACT A general equivalent circuit representation of symmetrical junction circulators in E- and H-plane configuration is presented. Assuming single-resonant circuits for the eigen-immittances, the frequency response of conventional circulators is calculated. Design rules are give

CORRECTION DUE TO FINITE PERMITTIVITY FOR A DIELECTRIC RESONATOR Ronald De 8medt * ABSTRACT To determine the resonant fields of a dielectric resonator with high permittivity e~ the asymptotic theory with 1/iS; as a small parameter, is extended with a correction term to yield accurate results even for relatively low values of ~~. Data are shown for the lowest f-independent, "non-confined"

NOVEL TECHNIQUES FOR ELECTRONIC TUNING OF DIELECTRIC RESONATORS A.N. FARR G.N. BLACKIE D. WILLIAMS ABSTRACT Two techniques for electronically tuning the TEOI mode resonant frequency of a dielectric resonator are presented and compared. A compact tunable dielectric resonator assembly is described which offers greater than .75% tuning range and an unloaded where Q maintained low noise at

DESIGN AND CONSTRUCTION OF MONOMODE AND MULTIMODE MICROWAVE FILTERS DIELECTRIC RESONATOR. WITH J. Perez, G. Gonzalez, V. Ortega* ABSTRACT Several X and Ku-band filters using dielectric resonators in microstrip-line circuit configuration have been designed and measured obtaining good results. A monomodefilter in the TE010 centered in 11,6 GHzwith a 150 MHzband has been realized. Then, a theory

ELECTROMAGNETIC SCATTERING BY AN INFINITE BURIED IN A DIELECTRIC J G Gallagher SHEET ARRAY OF PERIODIC BROKEN WIRES and D J Brammer ABSTRACT A general formulation of the scattering of a plane wave from a periodic broken-wire grid buried in a dielectric sheet is described for a general incidence angle and for arbitrary linear polarisation. The approach is applicable for grids in an infinite di