Electrical rotary coaxial connector

Claim 1

Rotary electrical coaxial connector for high-frequency transmission of wavelength λ between a fixed coaxial conductor and a coaxial conductor capable of rotating with respect to said fixed conductor, said connector being provided with a fixed part and a rotating part, characterized in that one of said parts, fixed in a cylindrical casing (3), comprises: a circumferential conducting piece (5) seated and kept in said casing (3) and comprising a first cylindrical section (6), a second cylindrical section (7) which is thicker and of lesser inside diameter and which follows the first section, and a very short inside shoulder (9) at the end of the second section (7); an outside conducting casing connector (10) extending said shoulder; an insulating layer (11) in said casing (10); an inside connecting conductor (13) in said layer; and in that the second part comprises: a circumferential conducting piece (16) seated in rotary manner in said first cylindrical section (6) and touching along its entire length the inside cylindrical surface of said first section; an external conducting connector shell (18) of lesser diameter; an inside conducting cylindrical shell (23) solidly and rigidly connected to said rotary conducting circumferential piece (16) and extending parallel to same and on the inside towards the shoulder of the other part; an insulating layer (20) in said conducting connector shell (18); an inside connecting conductor (21) in said layer (20), the two inside conductors of the first and second parts extending by a complementary set of pin-receptacle (14,22) with interposition between the respective outside and inside surfaces of pin and receptacle of a thin insulating film (15) the length of which is essentially equal to λ/4, the cylindrical shell (23) and said rotary conducting circumferential piece (16) seating between them an insulating shell (24) with which they make contact over a length of 3λ/4, said insulating shell (24) also making contact with the second cylindrical section (7) and said shoulder (9) over a length of λ/4, an insulating layer (20) being placed between the pin-receptacle set (14,22) and the rotary, condcuting circumferential piece (16) with its shell (23).