This directory addresses the problem of measuring S21 and S12
parameters of a two port circiut (for example, a filter) using
a single port device such as an antenna analizer.

In essence, you measure the circuit and then use the 'sprmWriter'
to convert these measurements int an SPRM file.

The major reference is here: https://arxiv.org/pdf/1606.02446.pdf




The files are:

videoWorkspace.ssx
    A circuit used to demonstrate how single port VNA calibration
    is done.  The 'errors.ssce' block is inserted.  Then, an S
    block is added with the values 1,2,2,1 which 'negates' the
    errors block.  Any impedance set in the L block is replicated
    in the S1 output.
    
CircuitUnderTest.ssx
    A simple low pass filter.  This circuit is used to write the
    example load,open,short files.

measureThru.ssx
    This demonstrates the basic computation done.  It uses the
    measurement files, computes the S parameters, and applies the
    S parameters directly to an S block.  No files are written.
    Compare the output of S1 with the exampleloads.s1p file... they
    will match.

sprmWriterTest.ssx
    The Daemon block is used to write the s2p file.  The S block reads
    this s2p file.  Works the same as 'measureThru' except the file
    must be manually written by clicking on the 'go' button.