Antenna projects

  

Typically an antenna consists of an arrangement of metallic conductors (or "elements") with an electrical connection (often through a transmission line) to the receiver or transmitter. A current forced through such a conductor by a radio transmitter will create an alternating magnetic field according to Ampère's law.

Or the alternating magnetic field due to a distant radio transmitter will induce a voltage at the antenna terminals, according to Faraday's law, which is connected to the input of a receiver.  But it is only through antennas that those radio frequency electrical signals are converted to (and from) propagating radio waves.
 
Depending on the design of the antenna, radio waves can be sent toward and received from all directions ("omnidirectional"), whereas a directional or beam antenna is designed to operate in a particular direction. In the so-called far field, at a considerable distance away from the antenna, the oscillating magnetic field is coupled with a similarly oscillating electric field; together these define an electromagnetic wave which is capable of propagating great distances.
 
 Light is one example of electromagnetic radiation, along with infrared and x-rays, while radio waves differ only in their much lower frequency (and much longer wavelength). Electronic circuits can operate at these lower frequencies, processing radio signals conducted through wires.
 

 

 

News

Cell antenna bill would give local say

Cell antenna bill would give local say CT Post HARTFORD — A bill that would give towns and cities a say in where cell phone companies can place antennas is moving to the state Senate for a vote. Sponsored by state Sen....

Mar 26, 2017

On The NAB Exhibit Floor: Dielectric

On The NAB Exhibit Floor: Dielectric TV News Check Dielectric, a provider of purpose-engineered antennas and RF systems for TV and radio broadcasters, will exhibit its, now-shipping TFU-WB UHF antenna to simplify...

Mar 27, 2017

Marin emergency radio update calls for new antenna sites

Marin Independent Journal Marin emergency radio update calls for new antenna sites Marin Independent Journal Plans for the county's new public safety radio system are calling for five new antenna sites while...

Mar 26, 2017

Mohu's Cord-Cutting Antenna Now Just $14.99

Mohu's Cord-Cutting Antenna Now Just $14.99 - Tom's Guide Tom's Guide This Editors' Choice indoor antenna is now on sale for 40 percent off. and more »

Mar 24, 2017

Greek Broadcaster Antenna Names Chief Creative Officer to Focus ...

Hollywood Reporter Greek Broadcaster Antenna Names Chief Creative Officer to Focus ... Hollywood Reporter The appointment of George Pofantis "further cements our commitment to and investment in original digital...

Mar 13, 2017

Dielectric Lands $3.9 Million Antenna Order | TVNewsCheck.com

TV Technology Dielectric Lands $3.9 Million Antenna Order | TVNewsCheck.com TV News Check In preparation for the upcoming spectrum repack, American Tower orders TFU-WB broadband, side-mount antennas plus transmission...

Mar 23, 2017

Sabattus: Town's antenna bill jumps from $1 to $11000

Sabattus: Town's antenna bill jumps from $1 to $11000 Lewiston Sun Journal The agreement in 2002 didn't specify the cost of additional antenna , Ward said. The town kept paying the $1 and was never billed for...

Mar 22, 2017

Fractus Antennas Pitches New “Antenna-less” Smartphone Technology

IEEE Spectrum Fractus Antennas Pitches New “ Antenna -less” Smartphone Technology IEEE Spectrum A smartphone antenna rests on a platform in the middle of a chamber lined with large Photo: Amy Nordrum Employees at...

Mar 14, 2017

Kymeta expects to ship its first flat-panel antennas in May

SpaceNews Kymeta expects to ship its first flat-panel antennas in May SpaceNews WASHINGTON — Kymeta will finally start shipping its first flat-panel antennas this spring, some five years after Microsoft co-founder...

Mar 20, 2017

Antenna Design Grows Up

SemiEngineering Antenna Design Grows Up SemiEngineering Apple's iPhone 4 antenna issue represents a classic example of what can go wrong in modern antenna design. Put one in the wrong place, and a seemingly...

Mar 9, 2017

Units & Modules