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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 ...
Buy: RCA Outdoor Yagi Satellite HD TV Antenna $54.04 (orig. $79.99) 32% OFF . 3. Best Buy Essentials Amplified Ultra-Thin Film Indoor HDTV Antenna
Outdoor antennas provide up to a 15 dB gain in signal strength and 15-20 dB greater rejection of ghost signals in analog TV. [6] Combined with a signal increase of 14 dB due to height and 11 dB due to lack of attenuating building walls, an outdoor antenna can result in a signal strength increase of up to 40 dB at the TV receiver.
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
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 ...
If a small loop antenna's loss is 50 dB (as if the antenna included a 50 dB attenuator), then the electrical inefficiency of that antenna will have little influence on the receiving system's signal-to-noise ratio. In contrast, at quieter frequencies at about 20 MHz and above, an antenna with a 50 dB loss could degrade the received signal-to ...