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METHOD AND APPARATUS FOR CALIBRATING A TEST SYSTEM FOR MEASURING A DEVICE UNDER TEST

  • US 20120109566A1
  • Filed: 11/02/2011
  • Published: 05/03/2012
  • Est. Priority Date: 11/02/2010
  • Status: Abandoned Application
First Claim
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1. A method of calibrating a measurement path in a vector network analyzer having two reference receivers and first and second measurement ports, the method comprising:

  • presenting a high reflection calibration standard and measuring a reflection characteristic for each of the first and second measurement ports to provide high reflection data;

    converting the high reflection data into the time domain and calculating a location of the high reflection calibration standard at each of a first device reference plane at the first measurement port and a second device reference plane at the second measurement port;

    presenting a load calibration standard and measuring the reflection characteristic for each of the first and second measurement ports to provide load data;

    converting the load data to the time domain to provide time domain impulse response load data;

    gating the time domain impulse response load data based on the locations of the high reflection calibration standard at each of the first and second device reference planes to provide gated time domain data;

    reconstructing frequency domain load data from the gated time domain data to provided reconstructed frequency domain data;

    connecting the first and second measurement ports together and measuring forward and reverse transmission characteristics; and

    calculating systematic error coefficients for the vector network analyzer based on the reconstructed frequency domain data and the forward and reverse transmission characteristics.

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