HOLLOW, NONCONTACTING ROTARY JOINT

摘要

Disclosed is an around the mast rotary joint capable of multichannel operation. There are two hollow coaxial sections (18, 20), each of which operates in the TEM or quasi-TEM mode. Each section comprises a coaxial feed line (16, 14) connected to a microstrip corporate feed network which is cylindrical (24, 40). Coupled to the microstrip corporate feed is a low impedance cylindrical interface section (22, 40) which couples the power to the other coaxial section. In addition to evenly feeding the interface section, the microstrip network includes impedance transformers and matching means to match the relatively high impedance of the coaxial feed line to the relatively low impedance of the interface section. The two sections are coupled together with a noncontacting choke (54).