HopeRF - some related material
werner at openmoko.org
Tue Jul 6 22:55:03 EDT 2010
I searched around a little more for information related to the
Silabs EZRadioPRO chips used in the HopeRF modules, and came
across the Si4420/4421. This predecessor (EZRadio) is less
sophisticated than the EZRadioPRO family and also comes only
in a larger package.
There are two things I found noteworthy about it:
1) The Silabs Si4421  and the Microchip MRF49XA  appear
to be identical.
2) Linked from that chip's page, there are two Application Notes
that discuss various antenna designs in quite some detail:
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