LTEQ MICROWAVE

QuinStar Technology’s Series QRJ rotary joints are available in standard circular waveguide sizes to cover frequencies from 11.6 to 150 GHz. Each rotary joint consists of two circular waveguide sections mounted on ball bearings. Connections to the guides are made using standard male and female circular flanges. Precise alignment of the waveguide sections prevents spurious mode generation, and the very small gap between abutting surfaces results in only a negligible loss in the TE01 circular mode. Amplitude variation with rotation is less than 0.2 dB and phase variation is less than 2 degrees for all models. The QRJ rotary joints provide efficient energy transfer in radar antenna systems or in other applications requiring for low phase variation, low insertion loss, and low return loss. They are also useful in special laboratory test set-ups for the measurement of millimeter wave parameters including phase variation in radiated fields. These rotary joints are designed for use with (or to interface with) circular waveguides. The QRJ rotary joint can also be fitted with two Series QMT Mode Transitions and a Series QMF Mode Filter to provide a rotary joint assembly for rectangular waveguide applications.