Hi Aleksandr,
Thanks for the suggestions. But I don't quite understand the two
diagrams from the first link
(http://www.moteiv.com/products/docs/tmote-sky-datasheet.pdf), particularly,
what their headers mean:
Figure 12 : Radiated pattern of the Inverted-F antenna with horizontal
mounting (from Chipcon AS)
Figure 13 : Radiated pattern of the Inverted-F antenna with vertical
mounting (from Chipcon AS)
I have tried googling for Chipcon AS to search for more info on these 2
diagrams, but until now, I can't seem to get it. What does "horizontal
mounting" and "vertical mounting" mean? Does it refer to the way the telos
was mounted, or does it refer to the omnidirectional radiation pattern,
which, from a 3D view, is shown from a horizontal point of view and a
vertical point of view respectively? If the former, what would the
horizontal and vertical mounting look like (with the battery pack included)?
I found another link,
http://www.ece.rochester.edu/research/wcng/papers/conference/holland_secon06.pdf
which solely tests on the range and radiation pattern of tmote sky.
However, I don't quite understand the first three graphs (all three are
similar, but with different power levels). What I don't understand is that
the graph is one of Packet yield vs. distance and angle at high/medium/low
transmit power, but from the graph, I see packet yield and y(ft) vs x(ft).
Thus, if either x or y is the difference in angle, what does the -ve value
represent?
Thanks in advance for your inputs.
Regards,
Azhar
From: "Sadkov Aleksander" <[EMAIL PROTECTED]>
To: <[email protected]>
Subject: RE: [Tinyos-help] Any info on radiation pattern of telosb?
Date: Tue, 3 Apr 2007 12:11:41 +0400
Hi Azhar,
You can check Tmote Sky Datasheet
(http://www.moteiv.com/products/docs/tmote-sky-datasheet.pdf) and
Technical Report for MicaZ motes "An Empirical Study of Radio Signal
Strength in Sensor Networks Using MICA2 Nodes" Jian Ma, Qianbin Chen,
Dian Zhang and Lionel M. Ni
Regards, Aleksandr.
> Hi all,
>
> How can I find out more info about the radiation patterns of
telosb?
> 'Coz when I placed the motes "normally" (i.e. with the battery pack
> touching the "ground") versus placing the motes 90 degrees up (i.e.
> with the long edge of the battery pack touching the "ground" through
> the help of blu-tacks), I get somewhat different results, although
> I've used the same program. Also, I'm wondering if the radiation is
> affected by the presence of metal casings in the building?
> Thanks.
>
> Regards,
> Azhar
>
>
> _______________________________________________
> Tinyos-help mailing list
> [email protected]
> https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-h
> elp
_______________________________________________
Tinyos-help mailing list
[email protected]
https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
_______________________________________________
Tinyos-help mailing list
[email protected]
https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
