EP 2731192 A1 20140514 - Bandstop filter for interferring signals
Title (en)
Bandstop filter for interferring signals
Title (de)
Bandstoppfilter für Störsignale
Title (fr)
Filtre coupe-bande pour interférence de signaux
Publication
Application
Priority
EP 12382438 A 20121108
Abstract (en)
A bandstop filter comprising: a signal input (10, 20); a signal output (11, 21); connecting means (12, 22) for connecting said signal input (10, 20) and said signal output (11, 21); at least one resonator (13 1 , 23 1 ) connected to said connecting means (12, 22), said at least one resonator (13 1 , 23 1 ) having a resonant frequency with a corresponding wavelength, said at least one resonator (13 1 , 23 1 ) comprising a helical transmission line (17 1 , 27 1 ). The helical transmission line (17 1 , 27 1 ) of said at least one resonator (13 1 , 23 1 ) has an electrical length of n times one-quarter wavelength of the resonant frequency, n being an odd number different from 1.
IPC 8 full level
H01P 1/205 (2006.01)
CPC (source: EP)
H01P 1/2053 (2013.01)
Citation (applicant)
US 5932522 A 19990803 - BELL H CLARK [US], et al
Citation (search report)
- [XYI] US 3763447 A 19731002 - TAKAHASHI A, et al
- [YD] US 5932522 A 19990803 - BELL H CLARK [US], et al
- [YA] EP 0673077 A1 19950920 - LK PRODUCTS OY [FI]
- [Y] JP S52125253 A 19771020 - ALPS ELECTRIC CO LTD
- [Y] EP 0660435 A2 19950628 - LK PRODUCTS OY [FI]
- [A] EP 0741431 A1 19961106 - LK PRODUCTS OY [FI]
- [A] US 4459571 A 19840710 - FRASER ROBERT J [CA]
- [A] US 3876963 A 19750408 - GRAHAM GERALD
- [XYI] MING YU ET AL: "High performance helical resonator filters", MICROWAVE CONFERENCE, 2004. 34TH EUROPEAN AMSTERDAM, THE NETHERLANDS 13 OCT. 2004, PISCATAWAY, NJ, USA,IEEE, 14 October 2004 (2004-10-14), pages 989 - 992, XP031996385, ISBN: 978-1-58053-992-0
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 12382438 A 20121108