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Very Short FM Antennas - RF Cafe Forums

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maxwell
 Post subject: Very Short FM Antennas
Posted: Tue Nov 29, 2005 10:12 am 
 
Captain
User avatar

Joined: Mon Sep 01, 2003 6:59 pm

Posts: 13

Location: Boston

Hi folks.

I'm looking for information about very short FM radio antennas. My application is a commercial product that is wearable by the user, or that can maybe be embedded in a portable device that will not require the wires from a plug-in headset to act as the antenna. Any ideas? I've searched through a lot of stuff on the web and can't find anything useful.

Your thoughts would be appreciated.

Thanks - Maxwell


 
   
 
Fred
 Post subject: Short FM Antennas
Posted: Tue Nov 29, 2005 12:36 pm 
Hey Max, I don't think you're going to find anything really useful. If you take a look at what has been around for decades, the long wires work best. The quality of the antenna seems to far outweight the quality of the receiver for most case. I have a car with a $350 FM tuner that can't pull in stations my PoS Escort will with the factory radio. In fact, my Escort can get both AM and FM stations that none of my other cars or my home stereo can get (home stereo only uses 300-ohm dipole).

The headphone wires that constitute the FM antenna for iPods, Walkmans, etc., are really lousy, as anyone who has tried to use one can tell you. Forget about picking up a station in a metal/concrete building. The little stubby whip antennas built into headset with receiver built in are crappy too.

Sorry to be the bearer of bad news, but I don't think you can get there from here. :(


 
  
 
maxwell
 Post subject:
Posted: Fri Dec 02, 2005 5:07 pm 
 
Captain
User avatar

Joined: Mon Sep 01, 2003 6:59 pm

Posts: 13

Location: Boston

Thanks Fred. That's pretty much what I thought, but I know that somewhere I have read about people doing research into very effective short antennas.

If anyone else knows of anything, please let me know.


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