proper antenna for energy meter monitoring (900Mhz)

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lamcro
Posts: 3
Joined: Fri May 03, 2019 1:56 pm

proper antenna for energy meter monitoring (900Mhz)

Post by lamcro » Fri May 03, 2019 2:14 pm

I got recently one of those new meters that is supposed to transmit energy consumption data through 900MHz (Landis&Gyr Focus ARX-SD), and I want to capture that data with my rtl-sd (the one that bring the two di-pole antennas).
¿Which di-pole antenna should I use and what would be the proper placement?

aurgathor
Posts: 59
Joined: Wed Apr 25, 2018 8:14 am

Re: proper antenna for energy meter monitoring (900Mhz)

Post by aurgathor » Fri May 03, 2019 3:22 pm

Why a dipole antenna? Methinks a quarter wave monopole should work just fine, too.

lamcro
Posts: 3
Joined: Fri May 03, 2019 1:56 pm

Re: proper antenna for energy meter monitoring (900Mhz)

Post by lamcro » Fri May 03, 2019 8:52 pm

That's what the rtl-sdr brought. It brought two:

https://www.amazon.com/gp/product/B011HVUEME/

rtlsdrblog
Site Admin
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Joined: Mon Nov 19, 2012 11:54 pm

Re: proper antenna for energy meter monitoring (900Mhz)

Post by rtlsdrblog » Sun May 05, 2019 3:55 am

Some info about optimal dipole lengths here on our guide

www.rtl-sdr.com/DIPOLE

So basically, use the short antennas extended very slightly. The signal is probably vertically polarized, so use the antenna vertically.

lamcro
Posts: 3
Joined: Fri May 03, 2019 1:56 pm

Re: proper antenna for energy meter monitoring (900Mhz)

Post by lamcro » Mon May 06, 2019 2:16 pm

Thank you for the information.
Unfortunately, I have recently been informed that in my area the radio functionality is still not used. Not many houses have these meters, only those with solar panels, such as mine. I imagine the infrastructure has not been put in place yet.
Hopefully the data is being transmitted, even if it is not used, but I doubt it. :(

aurgathor
Posts: 59
Joined: Wed Apr 25, 2018 8:14 am

Re: proper antenna for energy meter monitoring (900Mhz)

Post by aurgathor » Tue May 07, 2019 3:31 pm

You should be able to figure out if the transmitter is on or not. You can just use a piece of wire as an antenna and have them near the meter, and look at the spectrum. If there is a very strong signal around 900 MHz, that is probably your meter. Then move away from the meter to see if the signal level changes with distance.

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