EAntenna J-Pole vertical antennas, 11m-70cm

J-pole antennas have made a name for themselves due to their relatively high gain and comparatively small size. This type of antenna was invented at the beginning of the last century and was used in a zeppelin during the Second World War and was therefore called the Zepp antenna.

The electrical principle of the wire antenna for shortwave is the same as for this J-antenna or J-pole: a radiator with half-wavelength fed by a line with lambda/quarter length. The antenna has an earthed radiator and is therefore immune to static charges and the possible resulting interference during reception.

As this type of antenna takes up very little space for installation and operation, it can usually be used on the roof of a narrow townhouse without any problems. Unlike vertical ground planes, the design also means that no radials are required, which also take up a certain amount of space.

The EAntenna J-pole antennas are available in 6 versions:

• 11m (CB, monoband), height approx. 8.4 m, connection: PL (female)
  
• 8m (monoband), height approx. 5.7 m, connection : N (female)
  
• 6m (monoband), height approx. 5.0 m, connection : N (female)
  
• 4m (monoband), height approx. 4.0 m, connection : N (female)
  
• 2m /70 cm (dual band), height approx. 1.5 m, connection: PL (female)

Even with the dual-band antenna for 2 m and 70 cm, the feed only requires a common coaxial cable for both bands; a duplexer or switch is not required.

The radiators of the dual-band J-Pole consist of 10 mm aluminum tubes, the 4, 6 and 8 m antennas use 25 to 35 mm tubes, the variant for the 11 m CB band is constructed from tubes with diameters of 16 to 35 mm. Thanks to their robust construction, these space-saving antennas guarantee years of reliable radio operation.