An effective technique for the synthesis of an equiripple low pass prototype filter with asymmetric frequency response and arbitrary transfer function zeros Giuseppe Macchlarella Abstract A simple numerical technique (based on polynomial fitting) is presented which allows to determine the poles of a generallow-pass, frequency asymmetric, prototype filter (both of even or odd order) with equiripp

Rectangular disk directional couplers with a relatively tight coupling Tadashi Kawai, Yoshihiro Kokubo and Isao Ohta Department of Electronics, Faculty of Engineering, Himeji Institute of Technology 2167 Shosha, Himeji, 671-22, Japan Abstract This paper investigates a quadrature directional coupler designed on the basis of two-dimensional electromagnetic field of a rectangular disk configuration,

On the properties of microstrip directional couplers on magnetized ferrimagnetic layers M. R. M. L. Albuquerque*, A.G. d'Assunqio* and A. -Iii Giarola** * UFRN, Departamento de Engenharia Eletrica, 59072-970 - Natal, RN, Brazil **UNICAMP,Faculdade de Engenharia Eletrica, 13081-970 - Campinas, SP, Brazil Abstract The aim of this work is to present a study of microstrip directional couplers on magn

Coupling between two microstrip lines through an aperture in a thick ground plane Marat Davldovitz*, Fraasch** Steven *Rome Laboratory,RLlERAA, 31 Grenier St., Hanscom AFB, Ma 01731, USA, Tel.(617) 377-2897, Fax. (617) 377-5040, e-mail: marat-nomad.rl.plh.af.mil. **Alliant Techsystems, Tel. (612) 931-5631 Minneapolis, MN, Abstract Coupling between two microstrip lines through rectangular and circ

A wideband semi re-entrant microstrip coupler .I.c. Coetzee and .I.A.G. Malher. Department of Electrical and Electronic Engineering University of Pretoria. Pretoria 0002, South Africa Abstract The semi re-entrant microstrip (SREM) section is a useful structure for the realization of high levels of coupling between two microstrip lines. A full-wave spectral domain method is used to calculate the di

A novel type of low-cost high performance coaxial cable coupler Hongmlng An*, Osv81do Montl**, Ke Wu*, and Renato G. Boslslo* *Ecole Polytechnique de Montreal, PolyGrames Montreal, Quebec, Canada H3C 3A7 **Canadian Marconi Company, RF Group, 600 Dr. Frederik Philips Boulevard Ville StLaurent, Quebec, Canada H4m 289 Abstract Anewtype of extremely Iow-cost, high-performance couplers is presented in

New consistent model of coupled transmission lines and its verification by the FD. TD method Adam Abramowlcz*, Malgorzata Celuch.Marcysia Wojciech K Gwarek** and Warsaw University of Technology, .Institute of Electronics Fundamentals, ..Institute of Radioelectronics, Nowowiejska 15/19, 00-665 Warsaw, Poland Abstract The paper presents a new universal model of coupled transmission lines based tru

New mini'aturized cavity microwave S Gendraud*, S Moraud*, S Verdeyme*, P ~ulllon* S Vlgneron**, 8 Theron** *IRCOM Faculte des Sciences URA CNRS n0356 123 Avenue Albert Thomas 87060 Limoges, C8dex, France **ALCATEL ESPACE 26 Avenue JF Champollion 31037 Toulouse, C8dex, France Abstract Two original dielectric resonator topologies are presented: the first one is proposed to reduce the resonator size

Whispering gallery resonator temperature coefficient of frequency dependencies on temperature, disk configuration and resonant modes Dmitry P Tsarapkin Radio Engineering faculty, Moscow Power Engineering Institute (Technical University), Krasnokazarmennaya 14, Moscow, 111250, Russia Tel: (7-095) 362-7795; Fax:(7-095) 361-1620; E-mail: rpdu-mpei-rt.msk.su Abstract This paper deals with some basic p

Microwave dielectric resonant structures with electrically controlled frequency Y.M.PoplaYko, Y.V.Prokopenko, V.I.Molchanov and S. V.Pjatchanln Kiev Polytechnic Institute, 37, Peremogi Ave. Kiev, 252056, Ukraine Abstract Functional possibilities of UHF and microwave devices based on dielectric resonators could be essentially extended if their resonant frequency fo could be controlled. Some dielect