[Tinyos-help] Antenna gain on tmote

[Joe Polastre]

We achieve a total radiated output power of +3dBm with the antenna.
This data is from the indpendent RF lab that filed the FCC
certification report.

-Joe

On 7/20/06, Terence Joseph <tjormor at hotmail.com> wrote:
> Hi Joe,
>
> The radiation patterns given in the data sheet appear to be taken from
> http://www.chipcon.com/files/CC2420DBK_User_Manual_1_3.pdf.  However, in
> this document they claim a gain of -5dBi for the antenna.  Can you explain
> the discrepancy please?  Has it something to do with a difference in
> impedance matching?
>
> Best Regards,
> Terence
>
>
> >From: "Joe Polastre" <joe at polastre.com>
> >To: "Matt Thompson" <matt.thompson at lochisle.com>
> >CC: tinyos-help at Millennium.Berkeley.EDU
> >Subject: Re: [Tinyos-help] Antenna gain on tmote
> >Date: Tue, 18 Jul 2006 11:03:04 -0700
> >
> >Tmote Sky's antenna has about a 1-3dBi gain.  Impedance matching is
> >tough, and it took a few tries for us to get the right match.
> >
> >-Joe
> >
> >On 7/18/06, Matt Thompson <matt.thompson at lochisle.com> wrote:
> >>Hi,
> >>
> >>Does anyone know the dBi gain of the PCB antenna on the tmote sky
> >>modules??  We have layed out a board with fractus 1dBi gain antennas,
> >>and we're not getting close to the range of the tmote antennas.  Trying
> >>to figure out if this is due to lack of gain, or other
> >>design/manufacturing issues (unmatched impedance).
> >>
> >>Cheers,
> >>Matt
> >>_______________________________________________
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