How to Test an Active GPS Antenna | VNA Measurements & S-Parameter MATLAB Analysis

How to Test an Active GPS Antenna Using a VNA | S21, S22 & MATLAB RF Characterization Tool Purchase link: https://payhip.com/b/Yfu6C How do you know if your active GPS antenna is working properly? In this hands-on Practical RF tutorial, I'll show you step by step how to evaluate an active GPS antenna using the Keysight/Agilent E5071B Vector Network Analyzer (VNA). We'll set up a transmitting antenna on Port 1 and connect the active GPS antenna to Port 2 through a Bias-T, allowing us to supply DC power safely while measuring its RF performance. *What you'll learn:* How to connect and power an active GPS antenna using a Bias-T How to measure S21 and examine the received frequency response How to measure S22 output return loss and VSWR How to evaluate output impedance using a Smith chart How to examine S12, phase, and group delay How to import S2P files into MATLAB for analysis How to add frequency markers and compare measurements How to export results to Excel and PowerPoint How antenna positioning and reflections affect measurements *Equipment used:* Keysight/Agilent E5071B VNA Active multiband GNSS/GPS antenna Wideband transmitting antenna Mini-Circuits Bias-T DC power supply MATLAB S-parameter analysis script *Important:* This is a practical antenna evaluation demonstration, not a calibrated antenna gain measurement. The S21 results include antenna coupling, free-space path loss, polarization mismatch, and the active antenna's internal amplifier response. *MATLAB RF Analysis Script* Interested in using the MATLAB script demonstrated in this video for your own RF measurements? Purchase link: https://payhip.com/b/Yfu6C If you found this video helpful, please LIKE, SUBSCRIBE, and leave a COMMENT with your questions or suggestions. Thanks for watching Practical RF! #PracticalRF #GPSAntenna #ActiveAntenna #VNA #Keysight #MATLAB #RFEngineering #GNSS #SParameters #S21 #S22 #VSWR