Transition and interconnect structure for a cryocable

Details Transition and interconnect structure for a cryocable Transition and interconnect structure for a cryocable

1996-04-26

1999-01-05

Lee, Benny T.

Wave transmission lines and networks

Miscellaneous

Multipactor applications

333260, 505210, 505704, 505706, 505866, H01P 104

Patent

active

058567682

ABSTRACT:
An electrical interconnect provides a path between cryogenic or cryocooled circuitry and ambient temperatures. As a system, a cryocable 10 is combined with a trough-line contact or transition 20. In the preferred embodiment, the cryocable 10 comprises a conductor 11 disposed adjacent an insulator 12 which is in turn disposed adjacent another conductor 13. The components are sized so as to balance heat load through the cryocable 10 with the insertion loss. In the most preferred embodiment, a coaxial cryocable 10 has a center conductor 11 surrounded by a dielectric 12 (e.g. Teflon.TM.) surrounded by an outer conductor 13 which has a thickness between about 6 and 20 microns. The heat load is preferably less than one Watt, and most preferably less than one tenth of a Watt, with an insertion loss less than one decibel. In another aspect of the invention, a trough-line contact or transition 20 is provided in which the center conductor 11 is partially enveloped by dielectric 12 to form a relatively flat portion 28. The preferred overall geometry of the preferred embodiment of the cable is generally cylindrical, although other geometries are possible (e.g. stripline, microstrip, coplanar or slotline geometries).

REFERENCES:
patent: 3263193 (1966-07-01), Allen et al.
patent: 3686624 (1972-08-01), Napoli et al.
patent: 4487999 (1984-12-01), Baird et al.
patent: 4724409 (1988-02-01), Lehman
patent: 4737601 (1988-04-01), Gartzke
patent: 5120705 (1992-06-01), Davidson et al.
patent: 5508666 (1996-04-01), Nguyen

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