XCVR in the 2.2Ghz range

How easily can the RFX1800 or RFX2400 be modified to operate around
2.2Ghz? This is for a potential S-band satellite
project operating near that frequency.


Marcus L.
Principal Investigator, Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

On Sun, Nov 16, 2008 at 8:42 PM, Marcus D. Leech [email protected]
wrote:

How easily can the RFX1800 or RFX2400 be modified to operate around
2.2Ghz? This is for a potential S-band satellite
project operating near that frequency.

It looks like it uses an ADF4360 as the RX synthesizer. The RFX2400
looks like it has a lower bound at 2400MHz. Others in the family
could probably be used:

http://www.analog.com/en/rfif-components/pll-synthesizersvcos/adf4360-0/products/product.html

Though it’s all just handwaving as I haven’t done a complete analysis,
but it seems like changing that part and some of the db software would
do the trick.

Brian

On Sun, 2008-11-16 at 20:42 -0500, Marcus D. Leech wrote:

How easily can the RFX1800 or RFX2400 be modified to operate around
2.2Ghz? This is for a potential S-band satellite
project operating near that frequency.

This is straightforward; I did an S-band satellite groundstation
transceiver this way earlier this year. It’s a matter of replacing the
ADF4360 with a different rev. of the same chip that operates a lower
frequency, and removing the 2.4G ISM filter.

-Johnathan

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