The VNA is one of the more useful pieces of test equipment for designers and experimenters. It can measure the forward and reverse gain and phase response of a circuit, and the input and output reflection properties (complex impedance). The VNA is used to measure and adjust filters, coaxial cables, amplifiers, antenna input impedance vs. frequency, just to name a few.
The July/August 2004 QEX article discusses the design of the measurement hardware, control processor software on the instrument itself, and the software on a personal computer that controls and displays the measurements.
AvailabilityTAPR has entered into a manufacturing and marketing agreement with Ten-Tec to make the VNA available as an assembled product. See Ten-Tec's web site for further details.
Because the VNA uses several fine-pitch surface mount ICs, it is not practical for most users to build the unit themselves. For that reason, we will not be offering a kit version.
Bare PCB Ordering InformationYou may purchase a bare PCB. However, please bear in mind that these boards have been opitimized for automated production. Also there is no support provided by either Ten-Tec or TAPR for purchasers of the bare PCB.
PLEASE NOTESome of the parts for the VNA have been discontinued. Please check that you can find all the parts before ordering the PCB. TAPR is not able to provide parts!
Sorry, VNA PCB is no longer available
Documentation and SoftwareThe documentation and software can be found online.
PresentationsA presentation on the TAPR VNA was given at the 23rd Annual ARRL and TAPR Digital Communications Conference in Des Moines, Iowa, September 10-12, 2004. Read 2004 Digital Communications Conference page.
AcknowledgmentsThe TAPR VNA was made possible by the efforts of:
Tom McDermott, N5EG