MICROSTRIP QUADRUPLEXER USING -3 dB HYBRIDS S. Uysal*, A. H. Aghvami* and S. A. Mohamed** ABSTRACT A periodic branching microstrip filter using -3 dB directional couplers and short lengths of microstriplines with improved frequency characteristics is described in this paper. The designed filter separates the 2-18 GHz input signal into four 4 GHz contiguous channels. The design of the periodi

A 64 CHANNEL MULTIPLEXER WITH FREQUENCY CHARACTERISTICS DISCRIMINATION J. K. Hunton * ABSTRACT This paper describes a new class of multiplexing filter structure that has both the properties of channelized filtering and channelized linear frequency discrimination. The channelized filter-discriminator is intended for use as part of a microwave receiving system possessing a high probability of inte

FRON ftICROVAVE FILTER TO DIGITAL FILTER AND BACK AGAIK. Arne B. Dalby * ABSTRACT. A new very simple state variable flow graph representation for interdigital transmission line bandpass filters is presented, ,wich has led to two important results: 1) A new type of digital filter with properties, that surpass the properties of most other (all pole) digital filtertypes. 2) The study of the n

4GHz BAND BAND-PASS FILTER MODE DIELECTRIC RESONATOR Toshio Yoshio ABSTRACT Nishikawat. Kobayashitt Youhei USING AN ORTHOGONAL ARRAY COUPLING TM110 DUAL Ishikawat. Jun Hattorit. Kikuo Wakinot and A novel TM110 dual mode resonator using a monoblock ceramic was developed. The coupling principle of the resonator is explained by even and odd mode, and the design procedure is expressed. Th

A 6-POLE, SELF-EQUALIZED TRIPLE-MODE SINGLE CROSS-COUPLING FILTER WITH A R. R. Bonetti and A. COMSAT Laboratories, Clarksburg, E. Williams Md. 20811, U.S.A. ABSTRACT A six-pole, triple-mode filter with a self-equalized group delay response has been realized with only one cross-coupling. This simple coupling geometry achieves an unloaded Q efficiency of 90 percent and permits a cavity des

THE FOR PERFORMANCE SPACECRAFT OF A PROTOTYPE RECONFIGURABLE MESH REFLECTOR ANTENNA APPLICATIONS. CLARRICOATS AND Z HAI R C BROWN, PJB ABSTRACT Preliminary measurements are reported on a novel reconfigurable mesh reflector antenna. Reconfiguration from a spot-beam to an elliptical-beam is demonstrated with the antenna surface adjusted while mounted on the Antenna Range. The replacement

HYBRID SYNTHESIS OF CONTOURED BEAMS Pier Giuseppe MANTICA(*) ABSTRACT The paper reports on a synthesis algorithm shape of the reflector surfaces of an antenna coverage. The method of the elliptic paraboloid routine. An application example is reported. using computer optimization techniques to find the system that allows the better reproduction of a given is applied to obtain a good initial cond

SINGLE AND DOUBLE LAYER FSS OF TRIP OLE ARRAYS J. C. Vardaxoglou and A. H. Hossainzadeh* ABSTRACT The influence of the lattice geometry to the band spacings and crosspolarisation of single layer tripole arrays is investigated. A modal method of analysing cascaded FSS with arbitrary element and lattice geometries has been developed and the performance of double 1ayer arrays is described. 

THE INTERPANEL GAP SCATTERING EFFECT IN A COMPACT RANGE R. Shavit*, A. P. Smolski and C. J. Cook I. ABSTRACT The compact range has become a popular measurement tool in the evaluation of microwave antennas in recent years and accordingly larger reflectors over larger frequency bands are required. Those reflectors can be built to the required accuracies. but they have to be assembled from many

EVALUATION OF THE INTERMODULATION ANTENNAS AND RELATED STRUCTURES P L Aspden, A P Anderson and J C Bennett * PRODUCT PERFORMANCE BY MICROWAVE IMAGING OF REFLECTOR ABSTRACT This paper describes new developments that have been made in the adaptation of microwave imaging to locate sources of intermodulation product (IMP) generation upon microwave reflectors and related structures, and to predict t