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Apparatus including bifrequency electromagnetic wave generation means for sympathetic excitation of detached conductive structures

  • US 4,118,662 A
  • Filed: 06/24/1977
  • Issued: 10/03/1978
  • Est. Priority Date: 06/24/1977
  • Status: Expired due to Term
First Claim
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1. Apparatus for bifrequency electromagnetic excitation of a conductive structure in a manner so as to produce nearly equal signal magnitudes throughout the structure at each of several inherently stable frequencies, wherein said apparatus includes in operative combination;

  • a. Generating means for generating a first radio frequency signal;

    b. Generating means for generating a second radio frequency signal the frequency of which is higher than, but somewhat less than twice, the said first frequency;

    c. Generating means for generating a fourth frequency signal the frequency of which is substantially lower than the said first frequency;

    d. circuit coupling means having an output terminal means;

    e. Switching means cooperatively connected to said circuit coupling means and said first, second, and fourth signal generating means wherein said switch is responsive to said fourth signal so as to cause the said switching means to alternatively select, in a repetative manner, between the said first and the said second signal generating means thereby producing a third signal comprising either said first or said second signal at the output terminal means of said circuit coupling means;

    f. Radio frequency amplifying means the signal input means of which is operatively connected to said third signal output terminal means so as to amplify the said alternative first and second radio frequency signals produced by said switching means;

    g. Generating means for generating a fifth frequency signal operatively connected so as to modulate in amplitude the said radio frequency amplifier output;

    h. Inducer means operatively connected to said radio frequency amplifier means so as to provide an effective amplified third signal output coupling means wherein said inducer means is, at least, operative for emanating electromagnetic field lines at both said first and said second frequencies; and

    ,i. Portable direct current source of power operatively connected to the plural generating and amplifying means comprising the excitation apparatus.

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