Скачать или смотреть Understanding VNAs - Antenna Measurements

This video provides a short technical introduction to antenna impedance measurements using a vector network analyzer.

Understanding the Smith Chart:    • Understanding the Smith Chart  
Understanding S Parameters:    • Understanding S Parameters  
Understanding VSWR and Return Loss:    • Understanding VSWR and Return Loss  

Download a Rohde & Schwarz VNA Fundamentals primer: http://rsna.us/6050l9AgC

Learn more about Network Analyzers from Rohde & Schwarz: http://rsna.us/6051l9Agh

Timeline:
00:00 Introduction
00:13 Suggested viewing
00:31 About antennas
01:28 About antenna measurements
02:31 Vector network analyzers (VNA)
03:36 Connecting to the antenna
04:31 Configuring the analyzer
05:40 Performing calibration
06:43 Connecting calibration standards for antenna measurements
07:09 Antenna impedance measurement formats
07:28 Standing wave ratio (SWR)
08:18 Measurement example: SWR
08:47 Measurement example: antenna bandwidth from SWR
09:24 Return loss
10:12 Measurement example: return loss
10:45 Complex impedance
11:26 Smith Chart
12:17 Measurement example: Smith chart
12:59 Summary