Ultrasonic rod waveguide-radiator

  • US 20060090956A1
  • Filed: 11/04/2004
  • Published: 05/04/2006
  • Est. Priority Date: 11/04/2004
  • Status: Active Grant
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First Claim
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1. An ultrasonic resonant rod waveguide-radiator having a defined length, an entrance surface and an exit surface, comprising:

  • at least three cylindrical sections, including a first cylindrical section comprising the radiator'"'"'s entrance surface and a second cylindrical section comprising the radiator'"'"'s exit surface;

    at least two sections of variable cross-section;

    wherein said cylindrical sections and said sections of variable cross-section arrayed in alternating positions and acoustically rigidly connected together;

    wherein the ratio of the cross-sectional areas of the exit surface and the entrance surface is approximately 1;

    1;

    wherein the waveguide-radiator'"'"'s total length is equal to a multiple of half the length of an acoustic wave in the waveguide-radiator material, taking into account a geometrical dispersion;

    wherein the total length of the sections of variable cross-section is equal to or greater than the value of Log(N)/k;

    wherein the sum of the length of the second cylindrical section and the length of the section of variable cross-section adjacent to said second cylindrical section is at least 30% of the total length of the waveguide-radiator.

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