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Recent content by BOMBOVA

  1. BOMBOVA

    868MHz propagation question

    Denis : If you were in a screen room, with both modules, you would be in a controlled environment. You would be powering with a common power source and antenna link. Recriprocity would be exact and the laws of physics would be secure. (and,you would have a smile on your face.) Now, as you say...
  2. BOMBOVA

    Measuring Distance via Radio Waves

    Ihave seen this done in 1966 by Cubic Corp. withmicrowave eqipment. http://cubic.com/cts/ takes me back to my youth. fun stuff. i have pictures of the artic from then also... lots of ice... GerwingRhttp://cubic.com/cts/
  3. BOMBOVA

    Calculating the distance between 2 points

    chirp ultrasonic goes for 30 meters or so depending on frequency / power / sensor size. sync up a few from a sensor and track them. GerwingR
  4. BOMBOVA

    Communicaing through steel

    Shifting from radiation to conduction may lead to an answer. Coupling the antennas to the steel shell and by a copper conductor cable from outside steel to monitoring/transcieve location point may work beyond your expectations... ralph g. GerwingR Vancouver Metro BC.Ca
  5. BOMBOVA

    Wave propagation

    Xf is frequency of 1 km/1 wavelength Zf is frequency of mesh that is equal to the square ribbing in the wall, it is one wavelength of the square grid. It is apature coupled and passes through the grid. The grid metal as mesh is most effective in shielding, attenuating the rf signal at...
  6. BOMBOVA

    Carrier frequency selection and bandwidth

    Two Part Question. Carrier Frequency and bandwidth. selection of carrier frequency to application of bandwidth is very important. But for specific work. A simple question, and a simple generalized awnser. the higher the carrier frequency, the higher the bandwidth . RTG. Burnaby B.C.
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