Radio frequency particulate sensing system

Details Radio frequency particulate sensing system Radio frequency particulate sensing system

2007-08-07

2007-08-07

Benson, Walter (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

C324S641000

Reexamination Certificate

active

11477860

ABSTRACT:
A particulate sensing system for a particulate trap including a radio frequency transmit circuit and a radio frequency receive circuit is disclosed. The transmit circuit may include a wideband signal generator configured to produce a wideband radio frequency signal and a wideband radio frequency amplifier, coupled to the wideband signal generator. The transmit circuit may include a transmit antenna coupled to the wideband radio frequency amplifier and configured to propagate the wideband radio frequency signal through a filter medium. The receive circuit may include a receive antenna configured to receive the wideband radio frequency signal that has been propagated through the filter medium, and a bandpass filter coupled to the receive antenna and configured to limit a frequency range of the received wideband radio frequency signal. The receive circuit may include a radio frequency power sensing device coupled to the bandpass filter and configured to sense a power level of the received wideband radio frequency signal and configured to output a direct current voltage proportional to the total power received across an operating frequency range of the radio frequency power sensing device.

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