Characterizing PCB Insertion Loss with Automatic Fixture Removal
Publication Number: 5992-0656EN
Publication Date: 2015.03.26
Language: English
Application Notes

Characterizing PCB Insertion Loss with Automatic Fixture Removal

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There are several existing techniques like Direct Loss Subtraction, THRU-Reliction-Line (TRL) calibration and Automatic Fixture Removal (AFR) with 2X THRU fixtures for characterizing PCB unit length insertion loss. In this application note, two methods will be discussed.

  1. A new method for characterizing PCB loss by using AFR with 1X Open fixtures is proposed. This new method has been proven to have similar accuracy with TRL and AFR with 2X THRUs, but can save much more PCB area and measurement time;
  2. based on measurements and simulations of transmission lines with different reference impedance, the measurement bandwidth, accuracy, efficiency and cost of these techniques are compared.