The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: Paul Burridge
Subject: Re: RF Help
X-Newsreader: Forte Agent 1.8/32.548
Date: Fri, 03 Jan 2003 14:17:53 +0000
NNTP-Posting-Date: Fri, 03 Jan 2003 15:45:44 GMT
Organization: Virgin Net Usenet Service
On Fri, 3 Jan 2003 14:28:58 -0000, "Paddy Ryan"
>Here is what i need to do,
>I want to design a vechial taging system that will be able to give the
>to the receiver. I have no problem in doing the digital and software side of
>this but the problem is with the RF side.
>I want to use a radio matrix RX and TX modules to send the data. I am
>if i create a directional PCB antenna that directs the RF in the direction i
>want and use
>a resistive devide to bring the RF enagary down to a level that a receiver
>can pick it up
>inside a 2M area. Would it work.
>How would i build a 433Mhz PCB antenna that directs power in one direction
The legal power output limit at 433Mhz is only 10mW ERP. I think
you'll struggle like hell for range at that power with a PCB antenna.
The other question is, to the best of my knowledge, this band is for
car radio keys only so I don't see vehicle tracking as applicable to
"What is now proved was once only imagin'd"
- William Blake, 1793
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup