Title:
ELECTRIC FIELD MEASURING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/132904
Kind Code:
A1
Abstract:
The purpose of the invention is to provide an electric field measuring device in which a power supply line led into an area where a measurement is performed is eliminated and the accuracy and reliability of an electric field measurement performed in a facility such as an anechoic chamber or the like are improved.
In the electric field measuring device, a DC bias circuit for applying a DC bias voltage to an optical intensity modulator is disposed within the area and a DC bias control unit for controlling the DC bias voltage is disposed outside the area. The electric field measuring device is characterized in that: an electrical signal output from the DC bias control unit and involved in the DC bias voltage is converted to a light signal by an electrical-optical converter (E/O) and led into the area by an optical fiber; the light signal is converted to an electrical signal by an optical-electrical converter (O/E) disposed within the area; and the electrical signal is input to the DC bias circuit.
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Inventors:
SAKAI TAKESHI (JP)
MURE MASAHITO (JP)
MURE MASAHITO (JP)
Application Number:
PCT/JP2012/056561
Publication Date:
October 04, 2012
Filing Date:
March 14, 2012
Export Citation:
Assignee:
SUMITOMO OSAKA CEMENT CO LTD (JP)
SAKAI TAKESHI (JP)
MURE MASAHITO (JP)
SAKAI TAKESHI (JP)
MURE MASAHITO (JP)
International Classes:
G01R29/10; G01R29/08
Foreign References:
| JP2010127777A | 2010-06-10 | |||
| JP2002122622A | 2002-04-26 | |||
| JP2005127897A | 2005-05-19 | |||
| JP2002340953A | 2002-11-27 | |||
| JPH11205240A | 1999-07-30 | |||
| JP2006313071A | 2006-11-16 | |||
| JPH04328433A | 1992-11-17 |
Attorney, Agent or Firm:
TAMURA Chikashi et al. (JP)
Tamura 爾 (JP)
Tamura 爾 (JP)
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Claims: