omni 2m

omni 2m

Antennas : 2M

• Slim Jim Antenna - Slim Jim 2 meter omni directional vertical antenna
  [ Hits: 1447 | Votes: 5 | Rating: 5.4 ]
• 2m Big Wheel Antenna - A Useful Horizontally Polarised Omni-directional Antenna with Gain for 144 MHz
  [ Hits: 1323 | Votes: 4 | Rating: 7.75 ]
• Squarooka Antenna - squared bazooka for 2 meters band - Sort of similar to the one of the 6m omni. Instead of using twin-lead, this design makes use of a more or less regular double bazooka antenna (coaxial dipole). Your attention shall be drawn to the available standart literature, such as Rothammel. In order to "compute" the dimension, Karl Rothammel mentioned that the total length of the dipole shall be 95% of the free-space wavelength. The short-circuit bridges (closing the folded dipole) are to be placed at a distance-fraction being equal to the velocity factor of the coax cable used, which will be 66% using RG-58 or RG174.
  [ Hits: 356 | Votes: 0 | Rating: 0 ]

• 2m Halo Antenna - Construction and analysis of a low cost omnidirectional horizontally polarized antenna for 144 MHz, including notes on halo antenna stacking
  [ Hits: 1013 | Votes: 9 | Rating: 5.34 ]

• Construction of a J-Pole antenna for 2 meter - If you like building good antennas, this one is for you. The J-pole is a slim, omnidirectional, half-wave antenna fed at the end through a quarter-wave shorted transmission line. Its predecessor is the famous Zepp antenna developed for the Zeppelin airship.
  [ Hits: 386 | Votes: 2 | Rating: 10 ]

• Magnetic Loop for the 2m band - Such kind of omnidirectional antenna gives the possibility to be QRV with horizontal polarisation, as commonly used for the CW and SSB section of the 2m band. This actual design shows a 1.3:1 bandwidth of about 150kHz, centered to 144.200MHz.
  [ Hits: 573 | Votes: 1 | Rating: 10 ]