Title:
RESONATOR AND FILTER
Document Type and Number:
WIPO Patent Application WO/2003/075392
Kind Code:
A1
Abstract:
A resonator fabricated by forming a microstrip line having an electrical length corresponding to &lgr &sol 2 wavelength on a dielectric substrate. The microstrip line is formed spirally from the central part to the opposite side parts thereof while reversing the spiralling directions. The microstrip line is formed linearly, as a whole, at the outside parts of both spirals including the central part of the microstrip line and also formed linearly within a specified range from the end part of each spiral.
Inventors:
KAI MANABU (JP)
YAMANAKA KAZUNORI (JP)
NAKANISHI TERU (JP)
AKASEGAWA AKIHIKO (JP)
YAMANAKA KAZUNORI (JP)
NAKANISHI TERU (JP)
AKASEGAWA AKIHIKO (JP)
Application Number:
PCT/JP2002/001974
Publication Date:
September 12, 2003
Filing Date:
March 05, 2002
Export Citation:
Assignee:
FUJITSU LTD (JP)
KAI MANABU (JP)
YAMANAKA KAZUNORI (JP)
NAKANISHI TERU (JP)
AKASEGAWA AKIHIKO (JP)
KAI MANABU (JP)
YAMANAKA KAZUNORI (JP)
NAKANISHI TERU (JP)
AKASEGAWA AKIHIKO (JP)
International Classes:
H01P1/203; H01P7/08; (IPC1-7): H01P1/203; H01P7/08
Foreign References:
| US6108569A | 2000-08-22 | |||
| JP2001077609A | 2001-03-23 |
Other References:
C. K. Ong, Linfeng Chen, "High-Temperature Superconducting Band pass Spiral Filter", IEEE Microwave And Guided Wave Letters, 1999, Vol. 9, pages 407 - 409.
Attorney, Agent or Firm:
Saito, Chimoto (Koei-Palace 202 14-10, Makuharihongo 1-chome, Hanamigawa-k, Chiba-shi Chiba, JP)
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