[RFI] Inverse Square Law and RFI

[Roger (K8RI)]

A simple answer- I hope.
All RF follows the inverse square law, BUT RF can be carried on any 
electrical conductor.  Power lines, telephone line, and fences, along 
with other conductors can act as transmission lines and/or antennas.  A 
rusty connection on a fence, or guy wire can become an RF generator
Sometimes a power line may carry a signal quite some distance, and as 
Jim said, the power transformer(s) may limit the distance the signal may 
travel on the power lone.


On 6/11/2018 5:36 PM, Tony wrote:
> All:
>
> These might be a silly questions, but given how complex this subject 
> is, I thought I'd ask anyway.
>
> 1. Does the inverse square-law apply to all devices that emit RFI 
> where the RF energy emanating from the device falls off exponentially 
> with distance?
>
> 2. Is it common for power and other utility cables to carry and 
> radiate RFI from a device located in a neighbors home over long 
> distances before being attenuated?
>
> In a case like that, I would imagine locating the source of 
> interference would be nearly impossible with all that RFI being 
> radiated by utility lines.
>
> 73, Tony -K2MO
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>

-- 
Roger (K8RI)


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus