NEW TYPES OF VERY COMPACT 90° ACPS BRANCHLINE COUPLERS USING CPW SHUNT STUBS Khelifa Hettak, Cornelius J. Verver, Malcolm G. Stubbs and Gilbert Morin* Communications Research Centre Canada kheliffa.hettak-crc.ca kees.verver-crc.ca malcolm.stubbs-crc.ca *Defence Research Establishment Ottawa (DREO) gilbert.morin-dreo.dnd.ca 3701 Carling Ave., Box 11490, Station H, Ottawa, Canada, K2H 8S2 ABSTRACT

IMPROVED NARROW-WALL SHORT SLOT COUPLER DESIGN EXHIBITING SIGNIFICANT INCREASED BANDWIDTH AND LOW COST PRODUCTION Uwe Rosenberg and Konstantinos Beis Marconi Communications GmbH, Gerberstrasse 33, 71522 Backnang, Germany, e-mail:uwe.rosenberg-ieee.org ABSTRACT A novel `short-slot' coupler design variant is introduced to provide high performance over a substantial increased operating bandwidth comp

Concentric Ring Model of Monolithically Integrated Circular Spiral Transformers B. Rejaei, N. Ormando, and J.N. Burghartz Microwave Component Group, Laboratory of Electronic Components, Technology, and Materials (ECTM), DIMES, Faculty of Information Technology and Systems, Delft University of Technology, Feldmannweg 17, 2628 CT Delft, The Netherlands Email: b.rejaei-its.tudelft.nl, Phone: +31-15-2

A Programmable Phase Shifter for a Dielectric Waveguide Multistate Reflectometer B.M. Altrabsheh1 and R.J. Collier2 1 Microwave and System Research Group, School of Electronics, Computing and Maths, University of Surrey, Guildford, Surrey, GU2 7XH. Telephone: +44 (0) 1483 300800 Ext 2212. Fax: +44 (0) 1483 686081. Email: eep2ba-surrey.ac.uk 2 The Microelectronics Research Centre, Cavendish Labor

DESIGN AND INVESTIGATION OF FERROELECTRIC DIGITAL PHASE SHIFTER Vladimir Sherman*, Konstantin Astafiev*, Alexander Tagantsev*, Nava Setter*, Irina Vendik**, Orest Vendik** * Ceramics Laboratory, EPFL, Swiss Federal Institute of Technology, Lausanne, 1015, Switzerland, Phone: +41(21)6935805, Fax: +41(21)6935810, EMail: vladimir.cherman-epfl.ch ** Electrotechnical University, St. Petersburg, 197376,

E-PLANE MANIFOLD MULTIPLEXERS WITH IMPROVED BANDWIDTH G. Goussetis and D. Budimir Wireless Communications Research Group, Department of Electronic Systems, Westminster University, London W1W 6UW, UK, Tel: +44 20 79115139; Fax: +44 20 75804319 Email: gousseg-wmin.ac.uk, budimid-wmin.ac.uk ABSTRACT This paper demonstrates the bandwidth limitation of a multiplexer imposed by the poor stopband perfor

E-PLANE DOUBLE RIDGE WAVEGUIDE FILTERS AND DIPLEXERS FOR COMMUNICATION SYSTEMS G. Goussetis and D. Budimir Wireless Communications Research Group, Department of Electronic Systems, Westminster University, London W1W 6UW, UK, Tel: +44 20 79115139; Fax: +44 20 75804319 Email: gousseg-wmin.ac.uk, budimid-wmin.ac.uk ABSTRACT Modeling, design and experimental verification of E-plane ridge waveguide fil

A HIGH-ISOLATION S-BAND RING HYBRID COMBINER Pekka Eskelinen1, Harri Eskelinen2, Arvi Serkola3, Jouni Peltonen3 1 Helsinki University of Technology, Radio Laboratory, IDC 2 Lappeenranta University of Technology 3 Finnish Defence Force´s Research Institute of Technology Majborginmaki 26, 07700 Koskenkyla, FINLAND email: ari.eskelinen-pp.inet.fi ABSTRACT Through careful dimensioning, avoidance of

A TUNABLE MULTI-CHANNEL POWER COMBINER Patent Pending Chi Wang and Williams D. Blair Radio Frequency System Inc., Marlboro, NJ 07746, USA PH: 1-732-462-1880, FAX: 1-732-462-2540 Email: chi.wang-rfsworld.com; bill.blair-rfsworld.com ABSTRACT A novel type of filter power combiner, consisting of a plurality of tunable dielectric loaded resonator channel filters and using a multiple half-wavelength c

Asymmetric Three-Port 45° Power Dividers Composed of Small-Sized Impedance Transformers Hee-Ran Ahn and Ingo Wolff Dept. of Electrical Engineering Gerhard-Mercator University, Duisburg D-47048 Germany e-mail : ahn-ate.uni-duisburg.de Abstract--It has been demonstrated that two types of small-sized impedance transformers, constant VSWR-type transmission-line impedance transformers (CVTs) and cons