HIGH PASS FILTER DESIGN Peter LaTourrette* ABS TRAC T Microwave high pass filters are typically designed with the lengths of the series capacitive branches regarded as undesirable parasitics. It is shown that it is more reasonable to incorporate these lengths in the original designs. Several equivalences are presented which facilitate the practical realization of the filters, particularly in th

SOME DIFFRACTION COEFFICIENTS CURVED REFLECTORS RELATED TO DIFFRACTIONS AT THE EDGES OF M. Idemen * and G. Uzgoren * ABSTRACT To analyse the diffraction of high frequency waves one recourses often to the Geometrical Theory of Diffraction whose aim is to describe this phenomenon in terms of rays and certain factors. These latters involve several diffraction coefficients showing the modificat

GTD PARAMETRIC ANTENNA STUDY OF THE HYPERBOLOID SCATTERING IN A CASSEGRAINIAN K. SUDHAKARRAO* ABSTRACT The near-field principal plane patterns of a hyperboloid in a conventional Cassegrainian antenna are analyzed using The incident fields over the main reflector surface in the have subreflector the uniform GTD. principal planes been calculated using the analysis presented. 

NEW ANTENNA PATTERN SYNTHESIS IN APERTURE ANTENNA Ikuro SATO. and Mitsuhiro KUSANO. ABSTRUCT ,~~ ~ ' This paper describes a new antenna pattern synthesis using a composite parabolic reflector. The new method not only enables one to synthesize a desired beam shape but also to evaluate the gain within the coverage area without performing complex double integration. The effectiveness of the n



THE CHOt CE OF SWREFliECitGASUPRORT GEO~IRYfOR EARTH STATION ANTENNAS B Claydon ABSTRACT and N D Dang The side lobe radiation associated with earth station antennas for satellite communication is rapidly becoming a critical design parameter. The efficiency of both frequency and orbit utilisation can be improved by control of the sidelobe response of the earth station antenna and, consequentl

S-BAND SECOND HARMONIC YCO WITH AUXILIARY FUNDAMENTAL FREQUENCY OUTPUT FOR PLL STABILIZATION G. Lutteke, A.J. Bock, K. Stips* ABSTRACT A second harmonic push-push YCOwith auxiliary fundamental frequency output is presented. The fundamental frequency is extracted directly from the base of the transistor using only a small coupling capacitor. By this method a simple means is provided to extend th



TEMPERATURE USING STABILIZATION RESONATORS OF GaAs FET OsCILLATORS DIELECTRIC C. TSIRONIS, P. LESARTRE * ABSTRACT A model of frequency drift with temperature of GaAs FET oscillators, stabilized using dielectric resonators is presented. Conditions for output power, oscillation frequency and frequency stability have been derived. A stacked resonator with linear resonance frequencytemperature

20GHz GaAs FET OSCILLATOR USING A DIELECTRIC RESONATOR Motoo Mizumura, Kenzo Wada, Shigenobu Aihara, Isao Haga ABSTRACT A new type of highly stabilized 20 GHz GaAs FET oscillator using a dielectric resonator has been developed. Not using any frequency multiplying device, it features compactness, simple configuration and high reliability. A frequency stability of within :t15ppm (0°C~+5