Title:
Multiplex frequency super-broadband width converter
Document Type and Number:
Japanese Patent JP6190450
Kind Code:
B2
Abstract:
Piezoelectric micromachined ultrasonic transducer (pMUT) arrays and techniques for frequency shaping in pMUT arrays are described, for example to achieve both high frequency and low frequency operation in a same device. The ability to operate at both high and low frequencies may be tuned during use of the device to adaptively adjust for optimal resolution at a particular penetration depth of interest. In embodiments, various sizes of piezoelectric membranes are fabricated for tuning resonance frequency across the membranes. The variously sized piezoelectric membranes are lumped together by two or more separate electrode rails, enabling independent addressing between the two or more subgroups of sized transducer elements. Signal processing of the drive and/or response signals generated and/or received from each of the two or more electrode rails may achieve a variety of operative modes for the device, such as a near field mode, a far field mode, and an ultra wide bandwidth mode.
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Inventors:
Hajati Armand
Application Number:
JP2015510309A
Publication Date:
August 30, 2017
Filing Date:
April 19, 2013
Export Citation:
Assignee:
Fujifilm Dimatics, Inc.
International Classes:
H04R17/00; A61B8/00; G01N29/24
Domestic Patent References:
| JP63106553A | ||||
| JP2006075425A | ||||
| JP2008020429A |
Foreign References:
| WO2007046180A1 | ||||
| US20080013405 | ||||
| US20090301200 |
Attorney, Agent or Firm:
Koichi Tsujii
Sadao Kumakura
Fumiaki Otsuka
Takaki Nishijima
Hiroyuki Suda
Hiroshi Uesugi
Naoki Kondo
Sadao Kumakura
Fumiaki Otsuka
Takaki Nishijima
Hiroyuki Suda
Hiroshi Uesugi
Naoki Kondo
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