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An NVIS antenna configuration is a horizontally polarized (parallel with the surface of the earth) radiating element that is from 1 / 20 th wavelength to 1 / 4 wave above the ground. The optimum height of such an antenna is about 1 / 4 wavelength, and high angle radiation declines only slightly for heights up to about ...
On October 10, the Third National Radio Conference made three shortwave bands available to U.S. amateurs [8] at 80 meters (3.75 MHz), 40 meters (7 MHz) and 20 meters (14 MHz). These were allocated worldwide, while the 10-meter band (28 MHz) was created by the Washington International Radiotelegraph Conference [ 9 ] on 25 November 1927.
A HB9XBG Full Size Vertical Antenna for the 40m-band on Simplon Pass with view to Mount Fletschhorn. The 40-meter or 7-MHz band is an amateur radio frequency band, spanning 7.000-7.300 MHz in ITU Region 2, and 7.000-7.200 MHz in Regions 1 & 3. It is allocated to radio amateurs worldwide on a primary basis; however, only 7.000-7.200 MHz is ...
The 60-meter band or 5MHz band is a ... and 40 m (7 MHz), the 60-meter ... configured for high-angle radiation as an NVIS 'fountain' type antenna at a height above ...
3 comments Toggle Antenna configuration or propogation method, not necessarily antenna type subsection 2.1 NVIS refers more to a comprehensive communication paradigm, not merely antenna 3 Additional external links added on April 2nd, 2008
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Inverted vee antennas are horizontally polarized and have a similar pattern compared to a traditional horizontal dipole. Typical amateur radio inverted vee installed on roof. This multiband antenna allows transmissions on the 40/20/15/10 meter bands. Center point is held up with masting and ends are secured to roof. Two VHF verticals are also ...