Title:
ANTENNA DEVICE, RADIO RECEPTION DEVICE, AND RADIO TRANSMISSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2005/062424
Kind Code:
A1
Abstract:
There are provided an antenna deice, a signal reception device, and a signal transmission device utilizing an antenna element having a microstrip structure and coplanar structure and using a superconductive material. The antenna device, the signal reception device, and the signal transmission device realize improvement of a directivity gain, reduction of size, and reduction of power consumption. The antenna device includes: a planar antenna element; an adiabatic vessel having a radio window for transmitting electric waves, containing the planar antenna element, and insulating heat from outside; a waveguide arranged in the adiabatic vessel between the radio window and the antenna pattern formation plane of the planar antenna element; and cooling means for cooling the planar antenna element. The waveguide has a shape and dimensions which intensify the directivity of the planar antenna element and a superconductive film is used for the antenna pattern of the planar antenna element.
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Inventors:
YAMANAKA KAZUNORI (JP)
SHIGAKI MASAFUMI (JP)
NAKAZAWA ISAO (JP)
SHIGAKI MASAFUMI (JP)
NAKAZAWA ISAO (JP)
Application Number:
PCT/JP2003/016235
Publication Date:
July 07, 2005
Filing Date:
December 18, 2003
Export Citation:
Assignee:
FUJITSU LTD (JP)
YAMANAKA KAZUNORI (JP)
SHIGAKI MASAFUMI (JP)
NAKAZAWA ISAO (JP)
YAMANAKA KAZUNORI (JP)
SHIGAKI MASAFUMI (JP)
NAKAZAWA ISAO (JP)
International Classes:
H01Q9/04; H01Q13/02; H01Q13/08; H01Q21/06; (IPC1-7): H01Q13/08; H01Q13/02
Domestic Patent References:
| WO2001061785A2 | 2001-08-23 | |||
| WO1997017706A2 | 1997-05-15 |
Foreign References:
| JP2003046325A | 2003-02-14 | |||
| JPH05129823A | 1993-05-25 | |||
| JPH10242745A | 1998-09-11 | |||
| JP2000251819A | 2000-09-14 | |||
| JP2001016027A | 2001-01-19 | |||
| JPH057027A | 1993-01-14 | |||
| EP1014480A2 | 2000-06-28 | |||
| JP2002999997A |
Other References:
"Thin Film at Microwave Frequencies", 1999, SPRINGER, pages: 93
"High-Temperature-superconductor Thin Film at Microwave Frequencies", 1999, SPRINGER, pages: 93
KAI: "Development of Superconducting Filter System for IMT-2000", ELECTRONICS SOCIETY CONFERENCE, PROCEEDING SCS-3, 2002
See also references of EP 1696509A4
"High-Temperature-superconductor Thin Film at Microwave Frequencies", 1999, SPRINGER, pages: 93
KAI: "Development of Superconducting Filter System for IMT-2000", ELECTRONICS SOCIETY CONFERENCE, PROCEEDING SCS-3, 2002
See also references of EP 1696509A4
Attorney, Agent or Firm:
Yokoyama, Junichi c/o FUJITSU LIMITED (1-1 Kamikodanaka 4-chome, Nakahara-k, Kawasaki-shi Kanagawa, JP)
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