broadcast antennas

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broadcast antennas

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Antennas : Theory : Impedance matching
  • The Gamma Match - The gamma match was originally invented as a means of feeding vertical monopole antennas for medium wave broadcasts, which were earthed at the base for lightning protection- Hams are more likely to use a gamma match to feed a dipole or loop element, but the basic theory is easier to understand for the case of a quarter wave monopole.
    [ Hits: 462 | Votes: 1 | Rating: 8.00 ]
Propagation : NVIS Propagation
  • NVIS Propagation  new - Near Vertical Incidence Skywave propagation is a form of radio wave propagation used on the MF and HF bands to provide radio communications and broadcasting coverage over short distances, especially where the terrain contains obstacles.
    [ Hits: 105 | Votes: 0 | Rating: 0.00 ]
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