Title:
POWER DETECTION CIRCUIT, TRANSMITTER, AND POWER DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2010/070985
Kind Code:
A1
Abstract:
The transmission power of a transmission signal output to an antenna for transmitting a wireless signal from the antenna, that is provided in a transmitter which transmits a wireless signal, is detected, the reflected power of a reflected signal that is reflected from the antenna is detected, the difference between the transmission power and the reflected power is integrated at the timing at which a preamble signal for the wireless signal is transmitted, the integrated difference and a prescribed threshold value are compared, and an alarm is issued when the comparison result indicates that the value of the integrated difference is smaller than the threshold value.
Inventors:
KIRISAWA AKIHIRO (JP)
Application Number:
PCT/JP2009/068766
Publication Date:
June 24, 2010
Filing Date:
November 02, 2009
Export Citation:
Assignee:
NEC CORP (JP)
KIRISAWA AKIHIRO (JP)
KIRISAWA AKIHIRO (JP)
International Classes:
H04B1/04
Domestic Patent References:
| WO2005117309A1 | 2005-12-08 |
Foreign References:
| JP2007251333A | 2007-09-27 | |||
| JPH10224314A | 1998-08-21 | |||
| JP2008193719A | 2008-08-21 | |||
| JP2008085849A | 2008-04-10 |
Attorney, Agent or Firm:
MIYAZAKI, Teruo et al. (JP)
Akio Miyazaki (JP)
Akio Miyazaki (JP)
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