[Tinyos-help] external antenna

[André Miguel de Almeida Marrão Rodrigues]

Hi



In fact I was using a node that already had a 3 or 4 dbi external antenna 
connected,

and I just changed it.



It worked, but the range didn't get any interesting increase, that's the 
reason why I suggest using a mote with a power amplifier to get the 200m 
(because I think he is testing in an indoor scenario).



Regards,



André Rodrigues


----- Original Message ----- 
From: "David Moss" <dmm at rincon.com>
To: <schip at santafe.edu>; "'André Miguel de Almeida Marrão Rodrigues'" 
<andremiguelrodrigues at gmail.com>
Cc: <tinyos-help at Millennium.Berkeley.EDU>
Sent: Thursday, September 13, 2007 6:35 PM
Subject: RE: [Tinyos-help] external antenna


You guys are moving the C73 capacitor over to connect the external antenna,
right?


-----Original Message-----
From: tinyos-help-bounces at Millennium.Berkeley.EDU
[mailto:tinyos-help-bounces at Millennium.Berkeley.EDU] On Behalf Of Michael
Schippling
Sent: Thursday, September 13, 2007 10:25 AM
To: André Miguel de Almeida Marrão Rodrigues
Cc: tinyos-help at Millennium.Berkeley.EDU
Subject: Re: [Tinyos-help] external antenna

Are we sure that the antennas are for the right wavelength?
By "linksys" I guess you mean a dongle from an 802.11b,g
router? Do they have the same connector as your Tmote?
And are the connectors seated well?

Also, you're sure you disabled the internal antenna?
I think there's a capacitor that needs to be removed
on the standard Tmotes.

...I guess I should try this sometime...

MS


André Miguel de Almeida Marrão Rodrigues wrote:
> Hello
>
> I have tried these kind of antennas and it also did not work
> in an indoor scenario with 2 walls.
>
> For 200mts in your scenario perhaps you should use TMoteMiniPro or other
> nodes with a power amplifier.
>
> André
>
> ----- Original Message ----- From: "subhash nemani"
> <subhashnemani at gmail.com>
> To: <tinyos-help at Millennium.Berkeley.EDU>
> Sent: Thursday, September 13, 2007 11:41 AM
> Subject: [Tinyos-help] external antenna
>
>
>> we have tmotes without internal antenna and provision for external i.e
>> SMA connector .i have connected linksys 7dBi antennas
>> but it is not covering even a distance of 20 mts
>> what might be the problem???
>> please help me in this regard
>> i have tired the power settings using commands at the cygwin prompt
>> also but no result
>> atleast i need to transmit the signal for 200mts
>> plzzzzzzz help me ....
>> thank u in advance
>> _______________________________________________
>> Tinyos-help mailing list
>> Tinyos-help at Millennium.Berkeley.EDU
>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
>
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-- 
Platform: WinXP/Cygwin
TinyOS version: 1.x, Boomerang
Programmer: MIB510
Device(s): Mica2, MicaZ, Tmote
Sensor board: homebrew

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