Re: VNA questions
AL0117 said:
Hello fellows,
Could you suggest some good quality N male-N male VNA cables up to 8 GHz ?
The price is also an importand issue.
Also, I am looking for some calibration kitt for 75 ohm F connectors (open/load/short/thru). Could you suggest a vendor for these (other then @gilent)?
10x in advance.
Al
Cables assemblies:
What does it means "good quality" ?
For VNA use, "good quality" means extremally low phase change and loss variation. Also connectors shoul'd be "precision type". Precision type N connectors are rated up to 18 Ghz while the usual N type is rated to 12.4 GHz.
So, in order to get a cable assembly with precision type N connectors i suggest to look at to 18 GHz cables.
Times, Harbour, Huber+Suhner produce and sell lower cost alternative to the most expensive GoreTex calbes.
It's important that the cable assemby be rated "for VNA".
CalKit:
Rosemberger sell an european alternative to US made CalKit.
Maury Microwave can sell "economical" and customer tilored CalKit, you may buy a plastic suitcase instead expensive wood made one. Also, you may buy exactly (and only) the standards you need. Remember that often CalKit suitcases contains some expensive standard/adapters never used.
For usual measurements, up to moderate uncertainty, up to 8 GHz, and used by 1 or max 2 technically educated peoples, your cheapest need may be the following:
1) 1 Short male
2) 1 short female
3) 1 open male
4) 1 open female
5) 1 load male broadband
6) 1 load female broadband
7) 1 male-female transition of electrical lenght L
8) 1 male-male transition of electrical lenght L
9) 1 female-female transition of electrical lenght L
Note: electrical Lenght must be the same!
That configuration allow SOLT and SOLT/adapter swapping Calibration techniques.
No need for slidings loads, TRL kits, Gages, adapter to 7mm, air lines and other exoctic standards.