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System for the measurement of rotation and translation for modal analysis

  • US 5,915,278 A
  • Filed: 02/27/1995
  • Issued: 06/22/1999
  • Est. Priority Date: 02/27/1995
  • Status: Expired due to Term
First Claim
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1. A system comprising:

  • a signal transmission component adapted to be positioned on a structure-under-test, said transmission component including;

    a planar substrate;

    a first microwave oscillator, monolithically formed on the substrate, having a first output, and operable to generate at the first output a first signal having a first frequency;

    a second microwave oscillator, monolithically formed on the substrate, having a second output, and operable to generate at the second output a second signal having a second frequency;

    a third microwave oscillator, monolithically formed on the substrate, having a third output, and operable to generate at the third output a third signal having a third frequency;

    a first microstrip antenna, coupled to the output of the first microwave oscillator and responsive to the first microwave oscillator, and operable to transmit the first signal as a symmetrical directional signal having a first cross-section;

    a second microstrip antenna, coupled to the output of the second microwave oscillator and responsive to the second microwave oscillator, and operable to transmit the second signal as a symmetrical directional signal having a second cross-section;

    a third microstrip antenna, coupled to the output of the third microwave oscillator and responsive to the third microwave oscillator, and operable to transmit the third signal as a symmetrical directional signal having a third cross-section;

    wherein the first, second, and third microstrip antennas are positioned on the substrate generally symmetrically about a reference point on the substrate, to transmit the first, second, and third signals in a generally common direction normal to the substrate at the reference point;

    wherein the first, second, and third frequencies are different one from the other; and

    wherein the first, second, and third cross-sections are different one from the other; and

    a receiver component adapted to be positioned remote from the transmission component in a line-of-sight relation with the transmission component, said receiver component including;

    a base;

    a first receiver mounted on said base, and operable to detect the first signal, to determine a signal strength for the first signal, and to generate a first signal strength indication signal indicative of the signal strength for the first signal;

    a second receiver mounted on said base, and operable to detect the second signal, to determine a signal strength for the second signal, and to generate a second signal strength indication signal indicative of the signal strength for the second signal; and

    a third receiver mounted on said base, and operable to detect the third signal, to determine a signal strength for the third signal, and to generate a third signal strength indication signal indicative of the signal strength for the third signal.

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