22 radio antennas

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22 radio antennas

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Antennas : Horn

  • What is Horn Antenna - Horn Antenna - The energy of the beam when slowly transform into radiation, the losses are reduced and the focussing of the beam improves. A Horn antenna may be considered as a flared out wave guide, by which the directivity is improved and the diffraction is reduced. One of the first horn antennas was constructed in 1897 by Bengali-Indian radio researcher Jagadish Chandra Bose in his pioneering experiments with microwaves. The modern horn antenna was invented independently in 1938 by Wilmer Barrow and G. C. Southworth. This Horn model antenna is suitable employed in the UHF or SHF radio bands. Making this horn model antenna it will be easy for a beginner to make if it works in the 10GHz frequency, because small dimensions so it is not so difficult and also offers gain up to 25dBi.
    [ Hits: 74 | Votes: 0 | Rating: 0 ]
Antennas : J-Pole
  • 3 band J-Pole Antenna - Pictures of a 2 meter, 220, 440 copper J-Pole antennas
    [ Hits: 2607 | Votes: 12 | Rating: 6.08 ]
Antennas : Shortwave
  • Antennas for MF and LF - Long Waves, Short Antennas, designing antennas for MF and LF communications
    [ Hits: 2376 | Votes: 2 | Rating: 6 ]
Antennas : Stealth
  • HF antenna for high rise dwellers - If you have ever tried transmitting on HF from a tall block of apartments, where it's just not possible to erect a substantial aerial system, then this article is for you
    [ Hits: 5014 | Votes: 5 | Rating: 7.92 ]
Antennas : Vertical Radio Equipment : HF Vertical Antenna
  • Comet CHA250B Review - An interesting article by K3DAV comparing the COMET CHA250B to other HF multiband vertical antennas
    [ Hits: 1630 | Votes: 2 | Rating: 8.5 ]
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