Title:
ANTENNA EVALUATING APPARATUS AND ANTENNA EVALUATION METHOD
Document Type and Number:
WIPO Patent Application WO/2010/131423
Kind Code:
A1
Abstract:
An antenna evaluating apparatus is provided with receiving antennas (22a, 22b) to be evaluated, scatter antennas (21a-1 to 21a-N, 21b-1 to 21b-N) provided in the vicinity of the receiving antennas, signal generators (11a, 11b), delay circuits (12a, 12b), dividers (13a, 13b), phase shifting circuits (14a, 14b), and attenuation circuits (15a, 15b). A computer (10) controls the delay circuits (12a, 12b) so that delay time is added to radio frequency signals, and controls the phase shifting circuits (14a, 14b) and attenuation circuits (15a, 15b) so that the phase and amplitude of the radio frequency signals are changed and predetermined fading is generated. By emitting the radio frequency signals from the scatter antennas, multiple waves which include delay and fading are generated in the vicinity of the receiving antennas.
Inventors:
SAKATA TSUTOMU
YAMAMOTO ATSUSHI
AMARI SATORU
YAMAMOTO ATSUSHI
AMARI SATORU
Application Number:
PCT/JP2010/002882
Publication Date:
November 18, 2010
Filing Date:
April 21, 2010
Export Citation:
Assignee:
PANASONIC CORP (JP)
SAKATA TSUTOMU
YAMAMOTO ATSUSHI
AMARI SATORU
SAKATA TSUTOMU
YAMAMOTO ATSUSHI
AMARI SATORU
International Classes:
H01Q1/00; G01R29/10; G01S7/02; G01S7/40; H01Q3/26
Foreign References:
| JP2009049966A | 2009-03-05 | |||
| JP2000324063A | 2000-11-24 | |||
| JP2005227213A | 2005-08-25 | |||
| JP2000209166A | 2000-07-28 | |||
| JPH11266212A | 1999-09-28 | |||
| JP2005227213A | 2005-08-25 |
Other References:
YOSHIO KARASAWA: "Radiowave Propagation Fundamentals for Digital Mobile Communications", March 2003, CORONA PUBLISHING CO., LTD., pages: 5 - 8
TSUTOMU SAKATA ET AL.: "Evaluation of Mobile Terminal Antennas using Spatial Fading Emulator", MATSUSHITA TECHNICAL JOURNAL, vol. 52, no. 5, October 2006 (2006-10-01), pages 70 - 75
TSUTOMU SAKATA ET AL.: "Channel Capacity Measurements of a MIMO Antenna under a Rayleigh-fading Channel by a Spatial Fading Emulator", PROCEEDINGS OF THE 2007 IEICE SOCIETY CONFERENCE, September 2007 (2007-09-01), pages 1 - 9
TSUTOMU SAKATA ET AL.: "A Multipath Measurement System with a Variable Power Angular Spectrum for Handset MIMO Antennas", IEICE TECHNICAL REPORT, vol. 108, no. 5, April 2008 (2008-04-01), pages 13 - 18
TSUTOMU SAKATA ET AL.: "An Evaluation of the MIMO Transmission Characteristics in a Cluster Propagation Environment Using a Spatial Fading Emulator", IEICE TECHNICAL REPORT, vol. 108, no. 429, April 2009 (2009-04-01), pages 121 - 126
See also references of EP 2432073A4
TSUTOMU SAKATA ET AL.: "Evaluation of Mobile Terminal Antennas using Spatial Fading Emulator", MATSUSHITA TECHNICAL JOURNAL, vol. 52, no. 5, October 2006 (2006-10-01), pages 70 - 75
TSUTOMU SAKATA ET AL.: "Channel Capacity Measurements of a MIMO Antenna under a Rayleigh-fading Channel by a Spatial Fading Emulator", PROCEEDINGS OF THE 2007 IEICE SOCIETY CONFERENCE, September 2007 (2007-09-01), pages 1 - 9
TSUTOMU SAKATA ET AL.: "A Multipath Measurement System with a Variable Power Angular Spectrum for Handset MIMO Antennas", IEICE TECHNICAL REPORT, vol. 108, no. 5, April 2008 (2008-04-01), pages 13 - 18
TSUTOMU SAKATA ET AL.: "An Evaluation of the MIMO Transmission Characteristics in a Cluster Propagation Environment Using a Spatial Fading Emulator", IEICE TECHNICAL REPORT, vol. 108, no. 429, April 2009 (2009-04-01), pages 121 - 126
See also references of EP 2432073A4
Attorney, Agent or Firm:
TANAKA, Mitsuo et al. (JP)
Mitsuo Tanaka (JP)
Mitsuo Tanaka (JP)
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Claims: