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Microwave apparatus for controlled tissue ablation

  • US 7,699,841 B2
  • Filed: 03/16/2006
  • Issued: 04/20/2010
  • Est. Priority Date: 03/16/2006
  • Status: Active Grant
First Claim
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1. Apparatus for tissue ablation, said apparatus comprisingan elongated catheter terminated by a relatively flat antenna having opposite faces and includinga first, linear, conductor having opposite faces and proximal and distal ends,an electrically insulating spacer covering one face of the first conductor, anda second, serpentine, conductor composed of a series of similar segments positioned flush against said spacer and being coextensive lengthwise with the first conductor, said second conductor having a distal end connected to the distal end of the first conductor and a proximal end, andan electrically insulating enclosure surrounding the conductors, said enclosure including a body of low dielectric material adjacent the first conductor at one face of said antenna so that the antenna has a characteristic radiation pattern that is directed preferentially away from the other face of the antenna.

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