An annular wave-guide rotary joint with wave-guide feed

THERE are many engineering problems in the field of electronics which require a good method of transmitting radio frequency energy from a fixed unit to a rotating unit. For radio frequencies at which wave guides are normally employed, the rotary joint herewith described is especially suitable, particularly where there is a multiplicity of independent transmission lines involved in a relative motion; for example, in a radar or radio communications system where a combination of fixed and rotary transmission lines must be connected together.