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You can use Global Patent Index (GPI) to carry out detailed searches in the EPO's worldwide bibliographic (DOCDB), legal event (INPADOC) and full-text data sets, and download or visualise the search results for statistical analysis.

Current content: 157 636 699 patent documents

This week's update (09/08/2024 12:00 CET):

43 606 new documents added

1 129 815 documents amended

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EP 0020196 B1 19860611 - RINGPLATE-TYPE MICROWAVE ARRAY ANTENNA WITH FEEDING SYSTEM AND ITS APPLICATION IN RADARS

Title (en)

RINGPLATE-TYPE MICROWAVE ARRAY ANTENNA WITH FEEDING SYSTEM AND ITS APPLICATION IN RADARS

Publication

EP 0020196 B1 19860611 (FR)

Application

EP 80400537 A 19800421

Priority

FR 7911629 A 19790508

Abstract (en)

[origin: US4322731A] A disk-type antenna array is described with its supply device. The antenna is supplied with an electromagnetic wave having circular polarization in the TE11 mode delivered through a particular coupling means.

IPC 1-7

H01Q 25/02; H01Q 21/20

IPC 8 full level

H01Q 21/00 (2006.01); H01Q 21/20 (2006.01); H01Q 25/02 (2006.01)

CPC (source: EP US)

H01Q 21/0012 (2013.01 - EP US); H01Q 21/20 (2013.01 - EP US); H01Q 25/02 (2013.01 - EP US)

Designated contracting state (EPC)

CH DE GB IT LI NL SE

DOCDB simple family (publication)

EP 0020196 A1 19801210; EP 0020196 B1 19860611; DE 3071638 D1 19860717; FR 2456399 A1 19801205; FR 2456399 B1 19830718; US 4322731 A 19820330

DOCDB simple family (application)

EP 80400537 A 19800421; DE 3071638 T 19800421; FR 7911629 A 19790508; US 14637080 A 19800502