TRL (Thru, Reflect, Line) remains one of the most popular alternative calibration methods for measuring non-coaxial devices to the traditional short, open, load, and thru (SOLT), two-port error correction calibration method. TRL calibration is based upon an 8-term error model and uses three standards - thru connection, high reflectivity termination, and a section of uniform line (λ/4 longer than the thru line at the center frequency). The electrical length of the line is determined during the calibration and does not need to be known. The characteristic impedance, Z0 of the delay line is the only critical parameter.
Variations of the TRL calibration method are:
- LRL = Line, Reflect, Line
- TRM = Thru, Reflect, Match
- LRM = Line, Reflect, Match
The code for our TRL calculator is based on the Agilent AN 1287-9 application note published in 2006. We hope you enjoy our calculator. Please let us know if you find it useful.