Pyroelectric demodulating detector
| DWPI Title: Pyroelectric demodulator for use in amplitude-modulated radio receiver, has pyroelectric element receiving amplitude-modulated heating signal and generating output signal containing amplitude-modulated information |
| Abstract: A pyroelectric demodulating detector (also termed a pyroelectric demodulator) is disclosed which utilizes an electrical resistor stacked upon a pyroelectric element to demodulate an rf or microwave electrical input signal which is amplitude-modulated (AM). The pyroelectric demodulator, which can be formed as a hybrid or a monolithic device, has applications for use in AM radio receivers. Demodulation is performed by feeding the AM input signal into the resistor and converting the AM input signal into an AM heat signal which is conducted through the pyroelectric element and used to generate an electrical output signal containing AM information from the AM input signal. |
| Use: Pyroelectric demodulator for use in amplitude-modulated radio receiver for demodulating an amplitude-modulated electrical signal. |
| Advantage: The demodulator demodulates signals over a wide frequency range up to multiple gigahertz or more. The demodulator operates passively to demodulate the amplitude-modulated electrical signal to remove modulation at the carrier frequency and recover the amplitude-modulated information. |
| Novelty: The demodulator (10) has an electrical resistor (18) receiving an amplitude-modulated electrical signal, and generating an amplitude-modulated heating signal which is substantially free from a signal at a carrier frequency. A pyroelectric element (12) is in thermal communication with the electrical resistor to receive the amplitude-modulated heating signal and to generate an electrical output signal containing amplitude-modulated information. One side of the pyroelectric element is attached to a substrate made of a material e.g. silicon, silicon carbide, diamond, sapphire, ceramic and metal. |
| Filed: 5/10/2006 |
| Application Number: US2006431776A |
| Tech ID: SD 7872.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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