EP 1559170 B1 20171129 - READER OR TRANSMITTER AND/OR RECEIVER COMPRISING A SHROUDED ANTENNA
Title (en)
READER OR TRANSMITTER AND/OR RECEIVER COMPRISING A SHROUDED ANTENNA
Title (de)
ABGESCHIRMTE ANTENNE FÜR LESER ODER SENDER/EMPFÄNGER
Title (fr)
LECTEUR OU EMETTEUR ET/OU RECEPTEUR EQUIPE D'UNE ANTENNE BLINDEE
Publication
Application
Priority
EP 0212195 W 20021031
Abstract (en)
[origin: WO2004040698A1] The invention relates to a reader or transmitter and/or receiver (22) comprising a shrouded antenna which is formed by two groups of turns or coils (6, 8, 9; 16, 17). The first group of turns or coils forms a shrouded antenna. The second group comprises two coils (16, 17) which are disposed between the central coil (6) and respectively the two end coils (8, 9) of the first group. The second group of coils is powered in phase quadrature with respect to the first group of coils, the set of coils being arranged such as to obtain a magnetic field (H) having an amplitude (A) which is essentially constant along the length of the central axis (24) of the antenna inside the total internal volume of said antenna.
IPC 8 full level
CPC (source: EP US)
H01Q 1/22 (2013.01 - EP US); H01Q 1/2208 (2013.01 - EP US); H01Q 1/2216 (2013.01 - EP); H01Q 7/04 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
WO 2004040698 A1 20040513; AU 2002351813 A1 20040525; EP 1559170 A1 20050803; EP 1559170 B1 20171129; US 2006044208 A1 20060302; US 7098866 B2 20060829
DOCDB simple family (application)
EP 0212195 W 20021031; AU 2002351813 A 20021031; EP 02787538 A 20021031; US 53344405 A 20050502