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" <[EMAIL PROTECTED]>
To: "Matt Thompson" <[EMAIL PROTECTED]>
CC: tinyos-help@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 <[EMAIL PROTECTED]> 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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