Free TRL Calculator from Electro-Photonics

RF Cafe advertiser Electro-Photonics offers a free TRL calculator. "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."

Posted 7/1/2013

Windfreak Technologies Frequency Synthesizers - RF Cafe Website

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a lady's voice announced "You've Got Mail" when a new message arrived...