1. Engineering Overview / Abstract As precision RF test and measurement systems extend into the 40 – 110 GHz range, achieving sub-degree phase accuracy and minimal insertion-loss drift becomes a primary design requirement. Taconic RF-35 PCBs—engineered with a glass-reinforced PTFE composite (Dk = 3.50 ± 0.05, Df = 0.0018 @ 10 GHz)—enable calibration-grade impedance...



