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Embedded Antenna design - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues - primarily having to spend time purging garbage posts from the board. At some point I might start the RF Cafe Forums again if the phpBB software gets better at filtering spam.

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Antennas4us
 Post subject: Embedded Antenna design
Posted: Tue Mar 17, 2009 7:24 pm 
 
Lieutenant

Joined: Tue Mar 17, 2009 7:20 pm
Posts: 2
If anyone is looking for help with antenna design, I am here to answer some basic questions.
Or visit www.antennas4us.com.

Thanks. James.


 
   
 
Jessica
 Post subject: Re: Embedded Antenna design
Posted: Thu May 14, 2009 11:48 am 
 
Captain
User avatar

Joined: Thu Oct 12, 2006 7:50 am
Posts: 5
Hi James. Do you know if anyone (maybe you) makes a compact FM antenna that does not require something like headphone wires to act as the antenna? I know obtainig a reasonable efficieny in a small form factor at 88-108 MHz is tough (or impossible). Any thoughts?

_________________
Thanks,
Jess


 
   
 
nubbage
 Post subject: Re: Embedded Antenna design
Posted: Fri May 15, 2009 4:39 am 
 
General
User avatar

Joined: Fri Feb 17, 2006 12:07 pm
Posts: 236
Location: London UK
Hi Jess
About 20 years ago I bought from a mail order catalogue a low profile compact receive antenna that claimed to cover VHF FM and Band IV/V TV.
I will examine the case to see if there is a clue to the manufacturer. I bought 4 at the time, and I'm still using them as indoor antennas because my apartment has no means of installing an outdoor antenna for FM.
The size is about the same as a pack of 20 ciggies (am I allowed to be non-PC here?) or a lady's powder compact (ditto). It is certainly effective, but to examine it by reverse engineering, I would have to destroy it using a hacksaw. I think it must use some kind of VHF/UHF ferrite, with a coil would over it of a few turns.

_________________
At bottom, life is all about
Sucking in and blowing out.





Posted  11/12/2012