Global Patent Index - EP 0398419 A3

EP 0398419 A3 19920108 - ONE-OCTAVE 90 DEGREES 3DB DIRECTIONAL COUPLER EMBODIED IN MICROSTRIP AND SLOTLINE

Title (en)

ONE-OCTAVE 90 DEGREES 3DB DIRECTIONAL COUPLER EMBODIED IN MICROSTRIP AND SLOTLINE

Publication

EP 0398419 A3 19920108 (EN)

Application

EP 90201164 A 19900508

Priority

IT 2050889 A 19890515

Abstract (en)

[origin: EP0398419A2] A 3dB 90 degrees directional coupler having a one-octave band extension for microwave circuits is described. It consists of two coupled lines (2,3) embodied in microstrip form and a slotline loop (4,5) made in the ground plane (6) of the microstrip lines.

IPC 1-7

H01P 5/18

IPC 8 full level

H01P 5/18 (2006.01)

CPC (source: EP)

H01P 5/185 (2013.01)

Citation (search report)

  • [X] DE 2907837 A1 19790927 - ROBOTRON VEB K
  • MICROWAVE JOURNAL. vol. 29, no. 4, April 1986, DEDHAM, US, pages 197 - 201; B.PETROVIC: 'A new type of microstrip directional coupler'
  • ELECTRONICS LETTERS. vol. 19, no. 22, 27 October 1983, STEVENAGE, GB, pages 911 - 912; K.SHIBATA ET AL.: 'Three-line microstrip directional coupler with dielectric overlay'
  • 1986 IEEE-MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM- DIGEST; June 2-4,1986, Maryland, US, IEEE, New York, US, 1986; L.DONGTIEN: "New types of 3-dB directional couplers of microstrip transmission lines" pages 265-266
  • TRANSACTIONS OF THE INSTITUTE OF ELECTRONICS ANDCOMMUNICATION vol. E60, no. 4, April 1977, TOKYO, JP, pages 206 - 207; M.AIKAWA: 'Microstrip line directional coupler with tight coupling and high directivity'
  • SIEMENS FORSCHUNGS- UND ENTWICKLUNGSBERICHTE. vol. 10, no. 5, May 1981, BERLIN, DE, pages 271 - 279; J.SIEGL ET AL.: 'Calculated and measured parameters of interdigitated microstrip couplers'
  • SOVIET INVENTIONS ILLUSTRATED, Section EI, Week 8627, 18 July 1986 Derwent Publications Ltd., London, GB; Class W, Page 13, AN 86-175479/27; & SU-A-1 195 403 (ZHURAVSKII) 30 November 1985

Designated contracting state (EPC)

CH DE ES FR GB GR IT LI SE

DOCDB simple family (publication)

EP 0398419 A2 19901122; EP 0398419 A3 19920108; AU 5498690 A 19901115; IT 1229726 B 19910907; IT 8920508 A0 19890515; NO 902108 D0 19900511; NO 902108 L 19901116; ZA 903701 B 19910227

DOCDB simple family (application)

EP 90201164 A 19900508; AU 5498690 A 19900511; IT 2050889 A 19890515; NO 902108 A 19900511; ZA 903701 A 19900515