Title:
SURFACE-ACOUSTIC WAVE RESONATOR TYPE IMPEDANCE SENSOR AND IMPEDANCE DETECTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2016/019754
Kind Code:
A1
Abstract:
A surface-acoustic wave resonator type impedance sensor, comprising a first antenna (101), a matching network (102), a reflecting grating (103) and an interdigital transducer (104), wherein at least the reflecting grating (103) and the interdigital transducer (104) are arranged on a piezoelectric substrate, the matching network (102) comprises an optimum matching network composed of at least one capacitor (C1) and at least one inductor (L1), and the optimum matching network is further connected in parallel with an external sensor, and the external sensor is a capacitive or an inductive sensor. Accessing the matching network via the external sensor does not change the structure and arrangement of the piezoelectric substrate, and thus the sensing performance of the sensor is not affected, and the addition of processing steps and complexity caused by setting pins, etc. would not be brought about. The external sensor can be integrated into the matching network, so as to reduce the integral volume of the sensor. Also provided is an impedance detection system, comprising a reader, a signal processing module and an impedance sensor.
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Inventors:
DONG LANFEI (CN)
TENG XUEZHI (CN)
CHEN HAIJUN (CN)
WEI JIANGBO (CN)
JIAO QINGGUO (CN)
TENG XUEZHI (CN)
CHEN HAIJUN (CN)
WEI JIANGBO (CN)
JIAO QINGGUO (CN)
Application Number:
PCT/CN2015/081116
Publication Date:
February 11, 2016
Filing Date:
June 10, 2015
Export Citation:
Assignee:
MESNAC CO LTD (CN)
International Classes:
G01D5/56; H03H7/38; H03H9/25
Foreign References:
| US20030164713A1 | 2003-09-04 | |||
| CN103414006A | 2013-11-27 | |||
| CN103630233A | 2014-03-12 | |||
| CN103324238A | 2013-09-25 | |||
| CN102052986A | 2011-05-11 |
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