This SDR-Kits 2 port VNA measures from 0.1 upto 1300MHz. It uses an internal directional bridge and many functions besides being a darn good VNA. It has the following functions:
– Spectrum analyser (with tracking generator that can use an offset)
– LCR meter
– You can use it as counter and powermeter (max 0 dBm)
– very stable signal generator
– Radar plots
I bought my first one as a kit but today they are only sold assembled and tested. I also have a later version with all options like two sound devices. My homebuild is in my lab with a testset build in a 19″ cabinet. The other one is for portable use
Here: http://www.pa4tim.nl/?p=1594 you find my VNA tutorials. Some are translated by other users to French and German.
update jan 2014: I use a very small laptop that has a rather small battery and to much accesoires so I made a power supply, placed it in a cabinet from a telecom amp and everything including the laptop fits in a smal suitcase.
The vnwa has sma connectors , I use connector savers to extend that so they stick out . This way I can use bnc and SMA. But I also use it with GR connectors. The foam is there to keep it extra supported. Old holes are closed with metal shieldsheet and a cheap RF foam made out of steelwool/hotglue,
This is the vnwa testkit as designed by Kurt Poulsen, a very nice danish Ham and made for a workshop. It is for sale at SDR-kits. It is easy to build and hase parts included to do the experiments yourself. At SDR-kits (www.sdr-kits.net ) you can download the tutorial this kit is made for. A nice way to do experiments and besides that it is a very handy fixture.
A friend gave me 3 of these very nice and calibrated cables:
After a lot of DIY cal kits and a cheap Amphenol kit, I now have the Rosenberger kit made for SDR kits. This is a major improvement at the high frequency end. It comes with cal kit specs and that is a real plus. I now get a good calibration upto 1500MHz