Title:
CIRCUIT BOARD FOR WAVE SEPARATOR DEVICE, WAVE SEPARATOR, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2008/029641
Kind Code:
A1
Abstract:
It is an object to improve an isolation characteristic in the inside of a circuit
board and an isolation characteristic between the circuit board and its outside.
In order to achieve the object, the circuit board is comprised of a plurality
of mutually stacked dielectric layers (Lb, Ld, Lf), a matching circuit line (6)
surrounded with a plurality of the dielectric layers for adjusting an impedance
between first and second filter elements provided with mutually different passing
frequency bands, a first signal transmitting line (7) formed on a plurality of
the dielectric layers ranging from the top to the bottom for electrically connecting
the first filter elements with a first signal transmitting terminal, a second
signal transmitting line (8) for electrically connecting the second filter
elements with a second signal transmitting terminal, and first grounding conductors
(30, 44) arranged between the first signal transmitting line and the matching
circuit line, also arranged between the first and second signal transmitting
lines and further arranged to surround the first signal transmitting line.
Inventors:
TAKENOSHITA, Takeshi (R & D CenterKeihanna 3-5-3 Hikaridai, Seika-ch, Soraku-gun Kyoto 37, 6190237, JP)
竹之下 健 (〒37 京都府相楽郡精華町光台３丁目５番地３号 京セラ株式会社中央研究所内 Kyoto, 6190237, JP)
IKUTA, Takanori (R & D CenterKeihanna 3-5-3 Hikaridai, Seika-ch, Soraku-gun Kyoto 37, 6190237, JP)
竹之下 健 (〒37 京都府相楽郡精華町光台３丁目５番地３号 京セラ株式会社中央研究所内 Kyoto, 6190237, JP)
IKUTA, Takanori (R & D CenterKeihanna 3-5-3 Hikaridai, Seika-ch, Soraku-gun Kyoto 37, 6190237, JP)
Application Number:
JP2007/066451
Publication Date:
March 13, 2008
Filing Date:
August 24, 2007
Export Citation:
Assignee:
KYOCERA CORPORATION (6 Takeda Tobadono-cho, Fushimi-kuKyoto-shi, Kyoto 01, 6128501, JP)
京セラ株式会社 (〒01 京都府京都市伏見区竹田鳥羽殿町６番地 Kyoto, 6128501, JP)
TAKENOSHITA, Takeshi (R & D CenterKeihanna 3-5-3 Hikaridai, Seika-ch, Soraku-gun Kyoto 37, 6190237, JP)
竹之下 健 (〒37 京都府相楽郡精華町光台３丁目５番地３号 京セラ株式会社中央研究所内 Kyoto, 6190237, JP)
京セラ株式会社 (〒01 京都府京都市伏見区竹田鳥羽殿町６番地 Kyoto, 6128501, JP)
TAKENOSHITA, Takeshi (R & D CenterKeihanna 3-5-3 Hikaridai, Seika-ch, Soraku-gun Kyoto 37, 6190237, JP)
竹之下 健 (〒37 京都府相楽郡精華町光台３丁目５番地３号 京セラ株式会社中央研究所内 Kyoto, 6190237, JP)
International Classes:
H03H9/72; H04B1/40; H03H9/25; H03H9/70
Attorney, Agent or Firm:
YOSHITAKE, Hidetoshi et al. (10th floor, Sumitomo-seimei OBP Plaza Bldg.4-70, Shiromi 1-chome, Chuo-k, Osaka-shi Osaka 01, 5400001, JP)