Antenna - How One Works

Terk FM Only Stereo Antenna FM+

By Michael Russell
It's probably not something many people are interested in unless they're some kind of an electrical engineer or just bored, but understanding how an antenna works can be useful when the one on your TV or radio goes south on you and the reason is beyond your comprehension.
Trying to explain how an antenna works in simple English is not an easy task as there are a lot of technical specifications that need to be explained. But a general understanding is possible without getting into tech speak that would make Einstein cringe.


In order for an antenna to work it has to radiate. Your antenna, whether TV or radio has what is called free electrons running through it. It is these free electrons that vibrate. The question becomes, how do these free electrons vibrate and what causes them to vibrate?
Well, in real life it takes an electric field to move an electron. If you take an isolated straight dipole, the power comes from the combined fields of all the charged particles, both positive and negative, in the antenna. We'll call this field the antenna's coulomb field.


In addition to this field, the antenna exhibits a magnetic field that is the sum of the magnetic fields of all the free moving electrons. The antenna also has a dynamic electric field that is the vector sum of the dynamic electric fields of all the free electrons. What we can do is separate the electric field of the antenna at any point in space into two components. One of the components will be in phase with the total magnetic field and the other will be 90 degrees out of phase. The in-phase component is the radiation field of the antenna and the out of phase component is the induction field. At the antenna, both fields are parallel to the metal surface.


What happens is that the coulomb field and the induction field fall off much more quickly than the radiation field as the distance increases from the antenna. When you reach distances greater than a few wavelengths from the antenna, you have what is called the antenna's far field. This field is pure radiation. As you get closer to the antenna you have what is called the antenna's near field. This field is a mixture of radiation, coulomb, and induction fields. Still with us? Great, we're getting to the good part.


What ultimately happens with all these fields that makes it so that your TV or radio picks up signals through your antenna is this. The free electrons moving through your antenna are moving at their maximum speed. The right hand half of your antenna accumulates electrons. The left hand half of your antenna is where the electrons depart and leave an excess of charged ions. The coulomb field produces an imbalance and opposes the electrons' rightward motion.


 The electrons then stop, coast for a bit and then head back towards the left. After they reach maximum speed they then stop and process is repeated, now heading back to the right. The result is a vibration of free electrons that heats the metal and in turn generates electromagnetic waves.
And that, in as simple English as possible, is how your antenna works.


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Better than Sirius low profile

Directed Electronics 14105 Car Antenna 

Mr. Traveler99I have had Sirius radio for years now and owned many items including multiple antennas. This one wins hands down- either for your car or your home. This is the 2nd antenna of this kind I own, this one is used with my home docking kit, the other on the car of course. 


The wire is quite thin, so it's easily put into window/door seals and also can be put just about anywhere and will pick up a signal, ie: on the ground, the roof, placed on the edge of your deck,ect. It's also much smaller than all the other "home antennas" which for the most part never work anyway. This small antenna will pick up strong signals anywhere even near a building/structure.

Ronnie Greer was in a bind. I had the original antenna go out on me. I called Sirius and thankfully they were not in stock with what came with my S50. So i got on Amazon and read reviews. It looks like everyone has issues with their original antenna. The 14105 Antenna was a cheap way to go to get what i needed. I needed an antenna quick because i was traveling on vacation and needed it ASAP. I took a chance on this antenna (was a little nervous, I thought it looked generic) I hooked the antenna up the same way as the other and it worked great and continues to work smoothly. I would recommend buying the 14105 Antenna before trying to look for a more expensive model

 Gary A. Willehad gone through two " Radio Antennas  " antennas and they only last 6 months to a year before they start to lose signal and eventually quit working. This antenna has a stronger signal from the start and a slightly "beefier" design. Hopefully it will last a long long time. I hope this helps someone pick this over the low profile design.

Improving Reception With a Sirius Radio Antenna

Terk Technology AM/FM+ Radio Antenna

By Hugo T Reyes

With a Sirius radio antenna, you will never again experience poor radio reception. You will always have a smile on your face as you listen to your favorite radio programs, jazz music, or your favorite newscaster and commentators deliver their news and comments.

You will no longer suffer the inconvenience of constantly repositioning and repairing your twisted or damaged radio antennas. Once installed, it will provide you with uninterrupted radio service that no common antenna can provide you. This radio reception service will not only benefit you but your loved ones as well.

With one of these antennas you are assured that you have a better radio service, improved radio reception, and absolutely no more headaches.

There are also roof magnetic mounds that ensure excellent reception. With a Sirius radio antenna you are assured that you get products that are made using advanced technology and ensure better performance.

How can you maximize the benefits you can get from your Sirius radio antenna? First, know what you need. Do you need an antenna for your home? Or is it for your office, car, or boat? Then shop for models that are most appropriate for each location or use.

Study product manuals and installation manuals and make sure you follow the manufacturer's instruction carefully installing your antenna.

There are antenna screens provided (depending on the model), so place them in locations where they are not blocked by buildings, trees, and screens. Avoid placing your antenna screens where there are objects that would deflect radio receptions, so you are always assured of excellent radio service.

For satellite radio reception, position your antenna screens towards the sky facing the south, as most satellites are located here.

When installing the antenna on your car, the best place to position it is on the trunk or on the roof of the car. This will ensure good radio reception.

Sirius radio antennas are safe and easy to install. When installed as instructed by the manufacturers it could give optimum radio service.

The Sirius radio antenna includes a variety of products that are practical, easy to install and use.

For information regarding Sirius radio antenna products and pricing visit their website. You can also search the Internet for local distributors.

Hugo Reyes is a full time Spanish teacher who enjoys informing people about great products on the Internet.

I hope you found this article informative and helpful.

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