Line-reflect-reflect match calibration

Abstract

A method of compensating a calibration for a vector network analyzer includes performing calibrations on at least a pair of ports to determine error terms associated with each port wherein at least one of the error terms is based upon selecting the reactance of the load standard from a set of potential values in a manner such that the reference reactance errors are reduced.

1 . A method of compensating a calibration for a vector network analyzer comprising:
 (a) performing calibrations on at least a pair of ports to determine error terms associated with each port;   (b) wherein at least one of said error terms is based upon selecting the reactance of the load standard from a set of potential values in a manner such that the reference reactance errors are reduced.   
     
     
         2 . The method of  claim 1  wherein said method accounts for differences between the load measured at a probe-tip reference plane and measured at a center-of-thru reference plane. 
     
     
         3 . The method of  claim 1  wherein said set of potential value is based upon said reactance of said load. 
     
     
         4 . The method of  claim 1  wherein for each of said potential values computing a load impedance at the probe tip. 
     
     
         5 . The method of  claim 4  wherein for each said computed load impedance at said probe tip translating to the thru-center reference place. 
     
     
         6 . The method of  claim 5  wherein at least one error term is renormalized based upon said translated computed load impedance.