GPI coverage and content

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: 159 679 824 patent documents

This week's update (08/11/2024 12:00 CET):

164 112 new documents added

576 445 documents amended

GPI key values

Run regular monitoring (e.g. monthly or quarterly) of technical areas or companies

Use built-in charts to visualise technical trends and patenting activity of companies

Choose the data you want to see and download to focus on what you are interested in

Run data quality assessments to measure the risk of incomplete search results

EP 0320553 B1 19930120 - ADAPTIVE ANTENNA SYSTEMS

Title (en)

ADAPTIVE ANTENNA SYSTEMS

Publication

EP 0320553 B1 19930120 (EN)

Application

EP 87311217 A 19871218

Priority

EP 87311217 A 19871218

Abstract (en)

[origin: EP0320553A1] In the or each steered adaptive control processor loop with weight update gain of an adaptive antenna system is included a weight limiting network (11), which serves to put variable, but equal, bounding limits to each individual inphase and quadrature component of each adaptive weight, whereby to limit the growth of output noise in the presence of a misaligned signal whilst maintaining sidelobe jammer suppression capability.

IPC 1-7

H01Q 3/26

IPC 8 full level

H01Q 3/26 (2006.01)

CPC (source: EP)

H01Q 3/2617 (2013.01)

Designated contracting state (EPC)

BE DE FR IT NL SE

DOCDB simple family (publication)

EP 0320553 A1 19890621; EP 0320553 B1 19930120; DE 3783771 D1 19930304; DE 3783771 T2 19930506

DOCDB simple family (application)

EP 87311217 A 19871218; DE 3783771 T 19871218