EP 0350256 A3 19901128 - BAND ELIMINATION FILTER
Title (en)
BAND ELIMINATION FILTER
Publication
Application
Priority
JP 16658088 A 19880704
Abstract (en)
[origin: EP0350256A2] A band elimination filter includes a filter circuit (10) which is formed by a dielectric resonator (11) exhibiting inductiveness at a frequency f2 and a capacitor (12) connected in series with the dielectric resonator, and an input/output transmission line (13) which has an inductor (14) connected to the capacitor (12) of the filter circuit (10). Only the aforementioned filter circuit (10) is connected between an end portion of the inductor (14) and earthing means (15). In the band elimination filter having such structure, a signal attenuation amount is abruptly changed around the trap frequency f2, to improve the passing characteristic.
IPC 1-7
IPC 8 full level
H01P 1/205 (2006.01)
CPC (source: EP)
H01P 1/2056 (2013.01)
Citation (search report)
- [X] US 4703291 A 19871027 - NISHIKAWA TOSHIO [JP], et al
- [X] US 1568141 A 19260105 - ELSASSER HENRY W
- [A] US 4730173 A 19880308 - TSUNODA KIKUO [JP]
- [XPL] EP 0312011 A2 19890419 - MURATA MANUFACTURING CO [JP]
- [AD] PATENT ABSTRACTS OF JAPAN vol. 11, no. 23 (E-473)(2470) 22 January 1987; & JP-A-61 193 501 (MURATA MFG CO LTD) 28 August 1986,
- [A] PATENT ABSTRACTS OF JAPAN vol. 10, no. 285 (E-441)(2341) 27 September 1986; & JP-A-61 105 901 (SUMITOMO ELECTRIC IND LTD) 24 May 1986,
- [A] PATENT ABSTRACTS OF JAPAN vol. 11, no. 20 (E-472)(2467) 20 January 1987; & JP-A-61 191 101 (MURATA MFG CO LTD) 25 August 1986,
Designated contracting state (EPC)
DE FR SE
DOCDB simple family (publication)
EP 0350256 A2 19900110; EP 0350256 A3 19901128; FI 893231 A0 19890703; FI 893231 A 19900105; JP H0216802 A 19900119; NO 892754 D0 19890703; NO 892754 L 19900105
DOCDB simple family (application)
EP 89306771 A 19890704; FI 893231 A 19890703; JP 16658088 A 19880704; NO 892754 A 19890703