Title:
MIMOアンテナ装置及びそれを備えた無線通信装置
Document Type and Number:
Japanese Patent JP5073517
Kind Code:
B2
Abstract:
A controller of a MIMO antenna apparatus calculates a current transmission capacity based on signal levels detected by a signal level detector circuit. The controller calculates an estimated transmission capacity assuming that at least one of antenna elements currently connected to a MIMO modulator and demodulator circuit is changed to a further antenna element not connected to the MIMO modulator and demodulator circuit, based on the detected signal levels and degrees of electromagnetic coupling stored in a degree-of-coupling memory. The controller controls a switch circuit to connect the further antenna element to the MIMO modulator and demodulator circuit when the current transmission capacity becomes lower than the estimated transmission capacity.
Inventors:
Atsushi Yamamoto
Hiroshi Iwai
Tsutomu Sakata
Yoshio Koyanagi
Toshimitsu Hayashi
Hiroshi Iwai
Tsutomu Sakata
Yoshio Koyanagi
Toshimitsu Hayashi
Application Number:
JP2008017538A
Publication Date:
November 14, 2012
Filing Date:
January 29, 2008
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
H04J99/00; H04B7/04
Domestic Patent References:
| JP2009177732A | ||||
| JP2004328666A | ||||
| JP11261474A | ||||
| JP2008211586A | ||||
| JP2007142878A |
Foreign References:
| WO2006046714A1 |
Attorney, Agent or Firm:
Takuji Yamada
Mitsuo Tanaka
Kawabata Junichi
Mitsuo Tanaka
Kawabata Junichi