Global Patent Index - EP 0197653 A3

EP 0197653 A3 19880622 - MICROWAVE BANDPASS FILTER INCLUDING DIELECTRIC RESONATORS

Title (en)

MICROWAVE BANDPASS FILTER INCLUDING DIELECTRIC RESONATORS

Publication

EP 0197653 A3 19880622 (EN)

Application

EP 86301617 A 19860306

Priority

CA 478332 A 19850403

Abstract (en)

[origin: EP0197653A2] A dielectric resonator microwave bandpass filter includes a printed circuit board (40) supported within a cut-off waveguide (10, 12), with dielectric resonators (44) and coupling loops on an upper surface of the board and a well (42) beneath the board so that the resonators are well spaced from ground planes. Tuning screws (66) beneath the resonators, and coupling adjustment screws above the board adjacent to the coupling loops and between adjacent resonators, provide for adjustments to provide desired filter characteristics within a wide range. Isolators (30) within the waveguide have ports coupled to the resonators via micro-strip transmission lines comprising conductive tracks on the board and ports coupled to coaxial connectors (28) in end walls of the waveguide. The waveguide is formed from a cast body (10) and a flat lid (12).

IPC 1-7

H01P 1/208; H01P 1/219

IPC 8 full level

H01P 1/20 (2006.01); H01P 1/00 (2006.01); H01P 1/208 (2006.01); H01P 1/212 (2006.01); H01P 1/219 (2006.01); H01P 7/10 (2006.01)

CPC (source: EP)

H01P 1/2084 (2013.01); H01P 1/219 (2013.01)

Citation (search report)

  • [Y] US 3798578 A 19740319 - KONISHI Y, et al
  • [A] US 4477785 A 19841016 - ATIA ALI E [US]
  • [E] US 4686496 A 19870811 - SYRETT BARRY A [CA], et al
  • [Y] 1977 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, San Diego, 21st-23rd June 1977, pages 290-293, IEEE, Piscataway, US; J.K. PLOURDE et al.: "Microwave dielectric resonator filters utilizing Ba2Ti9O20 ceramics"
  • [A] PATENT ABSTRACTS OF JAPAN, vol. 2, no. 106, 31st August 1978, page 5659 E 78; & JP-A-53 72 438 (TOKYO SHIBAURA DENKI K.K.) 27-06-1978
  • [A] PATENT ABSTRACTS OF JAPAN, vol. 1, no. 42, 25th April 1977, page 2624 E 76; & JP-A-51 139 745 (OKI DENKI KOHGYO K.K.) 02-12-1976
  • [A] 1982 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, Dallas, 15th-17th June 1982, pages 389-391, IEEE, Piscataway, US; C.L. REN: "Mode suppressor for dielectric resonator filters"
  • [A] 1982 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, Dallas, 15th-17th June 1982, pages 416-418, IEEE, Piscataway, US; M.L. MAJEWSKI et al.: "MIC directional filters using dielectric resonators"
  • [A] PATENT ABSTRACTS OF JAPAN, vol. 8, no. 66 (E-234)[1503], 28th March 1984; & JP-A-58 215 101 (TDK K.K.) 14-12-1983

Designated contracting state (EPC)

AT CH DE FR GB LI NL SE

DOCDB simple family (publication)

EP 0197653 A2 19861015; EP 0197653 A3 19880622; EP 0197653 B1 19911121; AT E69671 T1 19911215; AU 5484886 A 19861009; AU 575469 B2 19880728; CA 1229389 A 19871117; DE 3682523 D1 19920102; JP H0733001 U 19950616; JP S61230501 A 19861014

DOCDB simple family (application)

EP 86301617 A 19860306; AT 86301617 T 19860306; AU 5484886 A 19860314; CA 478332 A 19850403; DE 3682523 T 19860306; JP 652794 U 19940516; JP 7262886 A 19860401