enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Whip antenna - Wikipedia

   en.wikipedia.org/wiki/Whip_antenna

   If it was infinitely thin the antenna would have an infinite input impedance, but the finite width gives typical, practical half wave whips an impedance of 800–1,500 ohms. These are usually fed through an impedance matching transformer or a quarter wave stub matching section (e.g. the J-pole antenna). An advantage is that because it acts as a ...

3. Radio masts and towers - Wikipedia

   en.wikipedia.org/wiki/Radio_masts_and_towers

   A mast radiator or mast antenna is a radio tower or mast in which the whole structure is an antenna. Mast antennas are the transmitting antennas typical for long or medium wave broadcasting. Structurally, the only difference is that some mast radiators require the mast base to be insulated from the ground.

4. Mast radiator - Wikipedia

   en.wikipedia.org/wiki/Mast_radiator

   An ideal monopole antenna radiates maximum power in horizontal directions at a height of 225 electrical degrees, about ⁠ 5 / 8 ⁠ or 0.625 of a wavelength (this is an approximation valid for a typical finite thickness mast; for an infinitely thin mast the maximum occurs at / = 0.637 [6]) As shown in the diagram, at heights below a half ...

5. Antenna types - Wikipedia

   en.wikipedia.org/wiki/Antenna_types

   A discone is exceptionally wideband, offering a frequency range ratio of up to approximately 10:1 , over three octaves above the antenna's lowest frequency, but otherwise only functions just as well as other quarter-wave monopoles: It is omnidirectional, vertically polarized, equally efficient as a monopole, and has gain similar to a ground ...

6. Television antenna - Wikipedia

   en.wikipedia.org/wiki/Television_antenna

   A short antenna pole next to a house Multiple Yagi TV aerials. Antennas are commonly placed on rooftops and sometimes in attics. Placing an antenna indoors significantly attenuates the level of the available signal. [19] [20] Directional antennas must be pointed at the transmitter they are receiving; in most cases great accuracy is not needed ...

7. Louisiana often holds inmates past their release date, DOJ ...

   www.aol.com/louisiana-often-holds-inmates-past...

   Louisiana’s prison system routinely holds people weeks and months after they have completed their sentences, the U.S. Department of Justice alleged in a lawsuit filed Friday. The suit against ...