Microwave detection apparatus
First Claim
1. Microwave detection apparatus comprisingan intravascular catheter containing an inner conductor and an outer conductor, each conductor having proximal and distal ends, the distal ends of said conductors forming an antenna at a distal end of the catheter;
- means defining a gap in the inner conductor relatively near the antenna thereby forming spaced-apart opposing distal and proximal inner conductor segments, andan electrical circuit in said catheter and connected electrically between said conductor segments, said circuit includinga temperature reference, anda Dicke-switch switchable in response to a switching signal between a first condition wherein the switch connects the proximal inner conductor segment to the temperature reference thereby delivering a temperature reference signal from the temperature reference to the proximal ends of the conductors and a second condition wherein the switch connects the proximal inner conductor segment to the distal inner conductor segment thereby delivering an antenna signal from the antenna to the proximal ends of the conductors, and a detector responsive to the antenna signal for providing an indication of microwave emissions picked up at the antenna.
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Accused Products
Abstract
Microwave detection apparatus includes an intravascular catheter containing inner and outer conductors, the distal ends of the conductors forming an antenna at a distal end of the catheter. A gap is provided in the inner conductor near the antenna thereby forming spaced-apart opposing proximal and distal inner conductor segments between which is connected an electrical circuit. That circuit includes a temperature reference and a Dicke-switch switchable in response to a switching signal between a first condition wherein the switch connects the proximal inner conductor segment to the temperature reference thereby delivering a temperature reference signal from the temperature reference to the proximal ends of the conductors and a second condition wherein the switch connects the proximal inner conductor segment to the distal inner conductor segment thereby delivering an antenna signal from the antenna to the proximal ends of the conductors.
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Citations
11 Claims
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1. Microwave detection apparatus comprising
an intravascular catheter containing an inner conductor and an outer conductor, each conductor having proximal and distal ends, the distal ends of said conductors forming an antenna at a distal end of the catheter; -
means defining a gap in the inner conductor relatively near the antenna thereby forming spaced-apart opposing distal and proximal inner conductor segments, and an electrical circuit in said catheter and connected electrically between said conductor segments, said circuit including a temperature reference, and a Dicke-switch switchable in response to a switching signal between a first condition wherein the switch connects the proximal inner conductor segment to the temperature reference thereby delivering a temperature reference signal from the temperature reference to the proximal ends of the conductors and a second condition wherein the switch connects the proximal inner conductor segment to the distal inner conductor segment thereby delivering an antenna signal from the antenna to the proximal ends of the conductors, and a detector responsive to the antenna signal for providing an indication of microwave emissions picked up at the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification