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In broadcast engineering, directional array refers to an antenna array arranged such that the superposition of the electromagnetic waves produce a predictable electromagnetic field. By spacing 2 or more antenna elements apart, changing the length of the transmission line from the transmitter, varying the power output, and shifting the phase, radio broadcasters can "shape" the area of signal coverage.

Geographically close co-channel or adjacent channel stations employ directional arrays (or a single directional antenna) so that other broadcasters may utilize the same or adjacent frequency. In the United States, the Federal Communications Commission offers a first-come, first-served approach, meaning licenses granted on co-channel or adjacent channels must protect the service contour of the previously licensed facility, thus, a directional array may be used to "shape" the station around existing facilities.



Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Directional_array — Please support Wikipedia.
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30539 videos foundNext > 

https://youtube.com/devicesupport

Shared Apex Loop Array - Wideband Directional Receiving Antenna

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5.8g FPV Gatling- 16db Antenna Array

Hi folks, here's how to phase four 5.8g directional antennas to make your own long range antenna array for FPV video.

Phased array, 15 antennas, matlab

Author: http://simulations.narod.ru/ Directional diagram of phased array consist of 15 antennas with delay lines. Delay lines make beamforming.

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This small amateur radio antenna array consists of a 4 element 2 meter yagi antenna and a 5 element 70 cm yagi antenna. The antennas can be mounted on a 4' boom and used as a small satellite...

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VOR VHF Omni directional Radio Range -- PILOT TRAINING

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30539 videos foundNext > 

46 news items

 
PR Newswire (press release)
Thu, 02 Apr 2015 14:30:43 -0700

Andrea Electronics Corporation designs, develops and manufactures audio technologies and equipment for enhancing applications requiring high performance quality voice input. The company's patented Digital Super Directional Array (DSDA™), patented ...
 
Radio magazine (press release)
Mon, 31 Oct 2011 15:16:30 -0700

This month we will look at some of the basics of AM directional antennas, and in subsequent months delve deeper into the directional array. The first thing to remember about antennas is that every one is, in some way or another, directional. The only ...
 
Radio World
Fri, 05 Dec 2014 10:45:00 -0800

He was brought in as a consultant to assist WFLA in maintaining its nighttime coverage, and he designed and implemented the first directional array at that station. It should be noted that the move from conventional horizontally oriented “flattop” and ...
 
Radio World
Mon, 23 Feb 2015 10:40:18 -0800

Let's suppose you have a tower near your directional array that's just within coordination distance, it's not detuned and it's 36.1 electrical degrees tall. This tower has never really been a problem to you, but you've known about it for years. Now the ...
 
Live Design
Fri, 30 Jan 2015 11:51:28 -0800

Twenty-four 1100-LFC low-frequency control elements were arranged in a directional array, with seven MILO® line array loudspeakers per side for out fill and two-each LYON-W and MICA® line array loudspeakers for front fill. Onstage foldback was supplied ...
 
Live Design
Wed, 18 Mar 2015 20:22:30 -0700

For amplified performances, the venue features dual hangs of 12-each MICA® line array loudspeakers and a flown directional array of six 1100-LFC low-frequency control elements. A UPQ-2P loudspeaker supplies center fill, six UPM-1XP loudspeakers ...
 
Radio World
Mon, 23 Feb 2015 09:26:15 -0800

On the morning of Sept. 8, an unprecedented storm ravaged much of the Palm Springs, Calif., area, and in particular the top of a small desert spot near Palm Springs known as Edom Hill. At that location is a five-tower diplex array that transmits CRC ...
 
InAVate
Wed, 28 Mar 2012 07:03:45 -0700

The Bosch Vari-directional Array is reviewed by A. Mohammed Rafeeq, from Alpha Data, an IT company that operates in the UAE and has offices in Abu Dhabi and Dubai. The product covers a range up to 50m and generates an evenly distributed sound ...
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