(19)
(11) EP 1 513 219 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION

(48) Corrigendum issued on:
20.07.2005 Bulletin 2005/29

(43) Date of publication:
09.03.2005 Bulletin 2005/10

(21) Application number: 04021106.2

(22) Date of filing: 06.09.2004
(51) International Patent Classification (IPC)7: H01P 7/08
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL HR LT LV MK

(30) Priority: 05.09.2003 JP 2003314396

(71) Applicant: NTT DoCoMo, Inc.
Tokyo 100-6150 (JP)

(72) Inventors:
  • Satoh, Kei, c/o NTT DoCoMo, Inc.
    Chiyoda-ku, Tokyo 100-6150 (JP)
  • Narahashi, Shoichi, c/o NTT DoCoMo, Inc.
    Chiyoda-ku, Tokyo 100-6150 (JP)
  • Koizumi, Daisuke, c/o NTT DoCoMo, Inc.
    Chiyoda-ku, Tokyo 100-6150 (JP)
  • Yamao, Yasushi, c/o NTT DoCoMo, Inc.
    Chiyoda-ku, Tokyo 100-6150 (JP)

(74) Representative: Hoffmann, Eckart, Dipl.-Ing. 
Patentanwalt, Bahnhofstrasse 103
82166 Gräfelfing
82166 Gräfelfing (DE)

   


(54) Coplanar waveguide resonator


(57) Formed on a dielectric substrate 11 are a center conductor 12 having a length L1 which is equivalent in electrical length to one quarter wavelength and ground conductors 13 disposed on the opposite sides of the center conductor with a gap portion therebetween in coplanar manner. The center conductor 12 and the ground conductors 13 located on the opposite sides thereof are connected together by shorting ends 14 resulting in forming corner areas, respectively whereby obtaining a coplanar waveguide resonator, whereinthe edge line of the shorting end 14 is recessed to have an arcuate curve configuration so that each corner area has an angle of greater than 90° to reduce power current concentration at the corner points in the respective corner areas.