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  • Users: searsjames
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  1. searsjames

    Propagation characteristics of horizontally polarized RF

    My cow antenna my be easiest to configure if it radiates with horizontal polarization. I am interested in the 433 Mhz band as well as 900 Mhz meaning that blocking vertical polarized interference is a Plus. My Questions: Compared with vertical, 1) How well does horizontal propagate over...
  2. searsjames

    Countries allowing 433 MHz telemetry

    Merry Christmas! This relates to the cow questions. What countries allow 433 Mhz telemetry with low duty cycle? I already 433 usage is harmonized in Europe and the US. How about Canada, Austrailia, Brazil, Japan, and Argentina? Much thanks jim
  3. searsjames

    Loop antenna glued to the back of a cow - Gain Question

    Gentlemen, I have also submitted this in antennas forun. I am developing a tracking system operating at 433 MHz that utilizes a loop antenna glued in the horizontal plane to the back side of a cow. The diameter is 1/4 wave and it will be spaced 1/4 inch from the skin. The height above...
  4. searsjames

    Loop antenna glued on back of cow-Gain question

    Gentlemen, I am developing a tracking system operating at 433 MHz that utilizes a loop antenna glued in the horizontal plane to the back side of a cow. The diameter is 1/4 wave and it will be spaced 1/4 inch from the skin. The height above ground will be 4.5 feet. According to...

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