[hpsdr] VHF-millimeter up/down converters?

[Joe Martin]

Hi Glenn, 

FYI, I am routinely using the ANAN-100D (it contains the Angelia transceiver board) to do pulsar radio astronomy at 424-436 MHz and hydrogen-line work at 1420.2 MHz by using the ANAN-100D as an IF stage in the radio telescope.  To access the UHF/Microwave frequencies with the ANAN-100D I use the appropriate LNAs for the band of interest (out on  the dish) and a MiniCircuits mixer and 50 MHz low pass filter in the shack that feeds the ANAN-100D, typically using a 28 MHz IF from the mixer but I also use 40 MHz IF occasionally; the ANAN-100D receives those IF frequencies fine.  

Using down converters appears to work much better in terms of weak signal sensitivity than does striving to make the Angelia operate at frequencies higher than 60 MHz directly.  

73, Joe K5SO


On Apr 18, 2015, at 3:50 PM, Glenn Elmore wrote:

> ***** High Performance Software Defined Radio Discussion List *****
> 
> I'm a total newbie on this list. I hope this is an appropriate posting.
> 
> I'm wondering who might have worked on, or be working on, frequency extensions for OpenHPSDR.  Specifically, it seems to me that an effort to extend the range of OpenHPSDR to include 50 MHz - 6 GHz or higher must have been considered if not attempted or accomplished by someone by this time.  Who has done this or might be interested in discussing it?
> 
> I'm asking because, although new to OpenHPSDR with an Angelia just freshly boxed up and working, I already see the desirability of having coverage of 144,220,432,900,1296 and 2304. It seems to me that it would be a shame to limit this to a conventional banded transverter approach and that doing a conversion to a higher fixed IF followed by a down conversion to cover,say 50 MHz to 6 GHz with a clean LO up/down converter is an obvious choice.  Allow this is a "radio" project, continuous coverage would allow extension of signal analyzer and vector network analysis throughout this range and should be a pretty useful capability.
> 
> Is this already being done by someone?
> 
> Glenn Elmore
> n6gn
> 
> 
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