Maryland's Defense Patent Database

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Ferroelectric radiation detector employing frequency modulated readout

Patent image
CCDC ARL

A detector for electromagnetic radiation such as millimeter wave and infrared employs a ring-shaped ferroelectric element having a temperature affected by an absorber for the radiation. The dielectric constant of the ferroelectric material is a strong function of the temperature near its Curie temperature. The resonant frequency of the ferroelectric element is detected by applying a swept-frequency signal to the circuit and detecting the frequency which enhances the energy of the pulse. A two-dimensional camera for the radiation employs a two-dimensional array of these ferroelectric resonant circuits and a system for rapidly interrogating their resonant frequencies on a sequential basis.

Inventors: 
Tidrow, Steven C.; Crowne, Frank; Potrepka, Daniel; Rod, Bernard J.
Patent Number: 
Technical domain: 
Materials and Coatings
FIle Date: 
2009-04-21
Grant Date: 
2012-03-27
Grant time: 
1,071 days
Grant time percentile rank: 
19
Claim count percentile rank: 
2
Citations percentile rank: 
2
'Cited by' percentile rank: 
1
Assignee: 
US ARMY