Differential transmission line including a conductor having brea

Details Differential transmission line including a conductor having brea Differential transmission line including a conductor having brea

1994-03-11

1996-07-23

Lee, Benny

Wave transmission lines and networks

Plural channel systems

With balanced circuits

333236, 174117FF, H01P 304

Patent

active

055393608

ABSTRACT:
A transmission line has a limited cross-section, a transmission line geometry and an improved characteristic impedance tolerance. The transmission line geometry utilizes a unique combination of broadside coupling and coplanar coupling with a reflector plate in order to improve the tolerance of the characteristic impedance. First, a larger coplanar gap is used to reduce the etching error. Second, the inner dielectric thickness sensitivities were also reduced by relying on broadside coupling and coplanar coupling to determine the characteristic impedance of the transmission line. Third, the effect of registration error in the broadside coupling is eliminated by rendering the two signal bearing conductors on the same layer.

REFERENCES:
patent: 3634808 (1972-06-01), Morrison
patent: 4707671 (1987-11-01), Suzuki et al.
patent: 4891616 (1990-01-01), Renken et al.
patent: 5084864 (1992-01-01), Turnbull et al.
patent: 5304959 (1994-04-01), Wisherd et al.

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