The QOT-19 from QuinStar Technology Inc is a Orthomode Transducer with Frequency 40 to 60 GHz, Insertion Loss 0.5 dB, Isolation 30 dB, Return Loss 15.56 dB, Antenna Waveguide Dimension 0.219 Inches (Diameter). More details for QOT-19 can be seen below.