Q-BAND SHORT P.S. BACKFIRE ANTENNA Leong ARRAYS Kooi and M.S. ABSTRACT This paper presents experimental results at Q-band for a waveguide-excited short backfire antenna. Two examples of the application of such a highly efficient radiator as elements in antenna arrays are given. It is shown that the use of quarter wavelength slots on the common main reflector rim of the array leads to substa



ARRAY ANTENNA ON A DIELECTRIC LAYER W~DYSLAW KOLOSOWSKI ABSTRACT: Antennas of this type constitute a significant progress in the construction of complex linear antenna arrays used in micro-wave range because of their specific production technology. However, no theoretical characteristics of those antennas on a dielectric layer exist. The paper presents results of an analysis of radiation chara

THE PRISMATIC ARRAY A NON DISPERSIVE ANTENNA TRAVELLING WAVE ARRAY ANTENNA S. DRABOWITCH , M. DUDOME ABSTRACT The prismatic array antenna is a new array antenna, the maximum gain direction of which is almost stationnary in the frequency band. A first scattering array acts as a feed for a second array tilted relative to the first one at some specific angle. Between the two arrays, propaga

ANALYS IS AND TOLERANCE STUDY OF AN ARRAY ANTENNA FOR A NEW GENERA TION OF SECONDARY RADARS. Massimo Di Fausto>'< - Giorgio Pelosi>'o~ - Antonio Saitto'~ Abstract. An open array antenna is analyzed considering performance and tolerances with respect to the specifications given by Eurocontrol and F .A.A. Computed results and parametric charts are presented. The analytical methods used briefly d

PHASED ARRAY MATCHING WITH GRATING LOBE REDUCTION J.M.J. Tokarski* ABSTRACT An analysis is given of a method of phased array grating lobe suppression and matching in the inifinite array approximation. The method is suited to limited scan operation but not restricted to it. The theoretical approach is also applicable almost unchanged, to the design of strip polarizers and a class of waveguide

RADIATION SHORTED iROffi A GAP CUT ACROSS RESONATOR THE CONDUCTING STRIP OF A DOUBLE MICROSTRIP Kemal Ozmehmet ABSTRACT A double shorted linear micros trip resonator symmetrically loaded with a gap is used to investigate the radiation from the gap. Gap will only radiate in odd modes and its radiation can be predicted using far field approach. Measured properties of the gap using pdd and ev

APPROXIMATE STRIP COUPLING FORMULAS FOR THE COUPLING BETWEEN MICRO- RESONATOR ANTENNAS. E. Van Lil, A. Van de Capelle. ABSTRACT Generally the best-known methods for computing mutual impedances are based on a direct integration of the E and H fields, as given in Jordan summations [~ ro . Other methods involve approximations valid for large, in theory infinite arrays, reducing any inte

DESIGN CONSIDERATIONS IN MICROSTRIP ANTENNA FABRICATION I.J. Bahl and P. Bhartia ABSTRACT Deviations in effective electrical dimensions caused by slight variations in finished micros trip antenna length, variations in the relative permittivity of the substrate material or nonuniformity in the substrate thickness lead to discrepancies between the designed and actual resonant frequencies. This

CURRENT DISTRIBUTION IN MICROSTRIP PLANAR ANTENNAS Juan R. MOSIG and Fred E. GARDIOL ABSTRACT The accurate determination of surface currents in microstrip planar antennas requires the solution of a two-dimensional singular integral equation. The first problem encountered when solving this equation numerically, is the obtention of a fast and accurate algorithm for evaluating its kernel, w