Tried the RF DEMO KIT evailable from www.sysjoint.com on eBay.
Tested with miniVNA tiny @ vna/J 3.3.4
The Board
Top layout
Bottom layout
(c) images http://deepelec.com/rf-demo-kit/
Reflection measurements
The measurements are done with full range 1MHz to 3GHz of the miniVNA tiny.
Transmission measurements