Antenna system for soot detecting
First Claim
1. In an apparatus for detecting the accumulation of particulate material on a filter medium, the filter medium formed of dielectric material and disposed in a chamber, said apparatus having means for generating and transmitting an RF signal through said filter medium and for monitoring the transmission loss of said signal through at least a portion of said filter medium so as to provide an indication of the content of particulate material accumulated on said filter medium, the improvement comprising:
- an input antenna for transmitting said signal and having at least a first antenna element extending longitudinally within said chamber and disposed within said filter medium; and
an output antenna for receiving the signal transmitted by said input antenna and having at least a second antenna element extending longitudinally within said chamber and disposed within said medium in parallel, spaced apart, axially overlapping relation with respect to said first antenna element.
3 Assignments
0 Petitions
Accused Products
Abstract
An apparatus for detecting the accumulation of particulate material on a filter medium formed of dielectric material and disposed in a chamber is provided. The apparatus is operable for generating and transmitting an RF signal through the filter medium and for monitoring the transmission loss of the signal through at least a portion of the filter medium so as to provide an indication of the content of particulate material accumulated on the filter medium. The apparatus includes an input antenna for transmitting the signal and having at least one antenna element extending longitudinally of the chamber and disposed within the filter medium; and an output antenna for receiving the signal transmitted by the input antenna and having at least one antenna element extending longitudinally of the chamber and disposed within the medium in parallel, spaced apart, axially overlapping relation with respect to the input antenna element.
126 Citations
7 Claims
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1. In an apparatus for detecting the accumulation of particulate material on a filter medium, the filter medium formed of dielectric material and disposed in a chamber, said apparatus having means for generating and transmitting an RF signal through said filter medium and for monitoring the transmission loss of said signal through at least a portion of said filter medium so as to provide an indication of the content of particulate material accumulated on said filter medium, the improvement comprising:
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an input antenna for transmitting said signal and having at least a first antenna element extending longitudinally within said chamber and disposed within said filter medium; and an output antenna for receiving the signal transmitted by said input antenna and having at least a second antenna element extending longitudinally within said chamber and disposed within said medium in parallel, spaced apart, axially overlapping relation with respect to said first antenna element. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification