Focal plane antenna to sensor interface for an...

Details Focal plane antenna to sensor interface for an... Focal plane antenna to sensor interface for an...

2007-08-07

2007-08-07

Porta, David (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

Reexamination Certificate

active

11239275

ABSTRACT:
An electrical interface between a scene to be imaged and a bolometer type sensor is disclosed. Efficiency is improved by means of a thermal energy concentrator including a lens and an antenna. Where a plurality of bolometer pixels are located in an array, a microantenna is provided for each pixel in the array with a common lens being provided to focus and channel incoming radiation to each microantenna. Radiation from a scene is further coupled by means of a lens and microantenna to the absorbing element of each bolometer through an AC coupling circuit including an electronic chopper implemented by means of a PIN diode, the conductivity of which is varied so as to affect the reflection coefficient of the input signal supplied through the microantenna.

REFERENCES:
patent: 5432374 (1995-07-01), Norton
patent: 6329649 (2001-12-01), Jack et al.
patent: 6441368 (2002-08-01), Grinberg et al.
patent: 6489615 (2002-12-01), Bluzer
patent: 2002/0117622 (2002-08-01), Bluzer
patent: WO-WO 00/75688 (2000-12-01), None

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