Hi,
Any help on this?
Thanks.
From: "Muhammad Azhar" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED], [email protected]
Subject: RE: [Tinyos-help] Any info on radiation pattern of telosb?
Date: Wed, 04 Apr 2007 02:01:47 +0000
>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
>
>
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>
>
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