Title:
ELECTROSTATIC CAPACITANCE TYPE TRANSDUCER
Document Type and Number:
WIPO Patent Application WO/2016/059762
Kind Code:
A1
Abstract:
An electrostatic capacitance type transducer includes one or more elements 2. The one or more elements each include a plurality of cell groups 14 each including a cell 1 including a first electrode 4 and a second electrode 5 arranged with a gap therebetween, the second electrode being electrically connected to a shared signal extraction electrode 15. In the cell group, each of the cells has an equal wiring length from the shared signal extraction electrode 15. The electrostatic capacitance of the plurality of cell groups, the wiring resistance between two adjacent cell groups, the number of cell groups in the element, and the central frequency of the element satisfy a predetermined relationship to increase transmission efficiency or reception sensitivity.
Inventors:
TORASHIMA KAZUTOSHI (JP)
AKIYAMA TAKAHIRO (JP)
AKIYAMA TAKAHIRO (JP)
Application Number:
PCT/JP2015/005006
Publication Date:
April 21, 2016
Filing Date:
October 01, 2015
Export Citation:
Assignee:
CANON KK (JP)
International Classes:
B06B1/02; G01N29/24; H04R19/00
Foreign References:
| EP1908529A2 | 2008-04-09 | |||
| US20120256519A1 | 2012-10-11 | |||
| US20110316383A1 | 2011-12-29 | |||
| US20120123268A1 | 2012-05-17 | |||
| US20140010052A1 | 2014-01-09 | |||
| US20090313809A1 | 2009-12-24 | |||
| JP2012222514A | 2012-11-12 |
Attorney, Agent or Firm:
ABE, Takuma et al. (30-2Shimomaruko 3-chome, Ohta-k, Tokyo 01, JP)
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