[hpsdr] Include VNA capability in the Pheonix?

[Rob Frohne]

Interesting idea Ignacio!

Rob

EB4APL wrote:
> Rob Frohne wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>>   
>>
>> ------------------------------------------------------------------------
>>
>> Hi Everyone,
>>
>> It seems to me that we can include without much overhead at all 
>> vector network analyzer capabilities in the Pheonix board.  While 
>> there are other stand alone VNA options available (N2PK and IW3HEV), 
>> I think the large dynamic range, and other good specs of the Pheonix 
>> will yield a better VNA than those options.  The block diagram for a 
>> narrow band VNA that fits our architecture is shown in a sketch I put 
>> on the web at:  Vector Network Analyzer Block Diagram 
>> <http://frohro-g5.wwc.edu/%7Efrohro/VNA.jpg>
>>
>> Have a look at it, and share your thoughts with us!
>>
>> Tnx & 73,
>>
>> Rob, KL7NA
> I have another use for this VNA. The  idea is as follows:
> It is possible to design a new type of ATU which uses de VNA impedance 
> readings to directly calculate the combinations of L and C in order to 
> match the load.
> This can be done almost instantaneously so it can avoid the delays 
> asociated to the try and error method of minimizing the SWR of common 
> ATUs. Maybe I´m reinventing the wheel and this technique is already 
> used but anyway I think this kind of ATU is a good candidate for a 
> future HPSDR module.
> -- 
> 73 de Ignacio, EB4APL
>   

-- 
Rob Frohne, Ph.D., P.E.
E.F. Cross School of Engineering
Walla Walla College
100 SW 4th Street
College Place, WA 99324
(509) 527-2075			 http://www.wwc.edu/~frohro

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