US4680557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Staggered ground-plane microstrip transmission line
Assignee: Tektronix Inc
•
Filing: 1985-04-22
•
Granted: 1987-07-14
•
Expires: 2005-04-22
Abstract
Abstract A microstrip transmission line comprises a plurality of signal-carrying lines disposed along a dielectric ribbon and separated by a predetermined spacing. Ground-plane conductors are disposed on the opposite side of the ribbon in staggered relation to the signal-carrying lines such that the ground-plane conductors occupy spaces corresponding to the gaps between adjacent signal-carrying lines. This arrangement lowers the capacitance and raises the impedance of the transmission line while maintaining high signal line density.
Inventors
- 👤 Peter M. Compton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:50
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/081; H05; H05K; H05K1/00; H05K1/02; H05K1/0213; H05K1/0237; H05K1/025; H05K1/0253; H05K1/0216; H05K1/0218; H05K1/0219; H05K1/03; H05K1/0393; H05K2201/00; H05K2201/07; H05K2201/0707; H05K2201/0715; H05K2201/09; H05K2201/09209; H05K2201/09654; H05K2201/09663; H05K2201/09709
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
A transmission line for an electrical signal comprising a plurality of signal-carrying conductors having parallel edges disposed on one side of a strip of dielectric material, each of said conductors being spaced apart from each other across said strip by a spacing W between adjacent edges, a plurality of ground-plane conductors having parallel edges disposed parallel to said signal-carrying conductors and arranged on the opposite side of said strip in staggered relation with respect to said signal-carrying conductors such that each of said ground-plane conductors occupies a position corresponding to a location of one of said spacings between adjacent signal-carrying conductors, wherein the edges of each of the signal-carrying conductors are substantially congruent with the respective edges of the ground-plane conductors occupying said spacings on either side of each of said signal-carrying conductors.
Claim 2
Dependent Claim
133 words
A transmission line for an electrical signal comprising a plurality of signal-carrying conductors having parallel edges disposed on one side of a strip of dielectric material, each of said conductors being spaced apart from each other across said strip by a spacing W between adjacent edges, a plurality of ground-plane conductors having parallel edges disposed parallel to said signal-carrying conductors and arranged on the opposite side of said strip in staggered relation with respect to said signal-carrying conductors such that each of said ground-plane conductors occupies a position corresponding to a location of one of said spacings between adjacent signal-carrying conductors, wherein the edges of each of the signal-carrying conductors are substantially congruent with the respective edges of the ground-plane conductors occupying said spacings on either side of each of said signal-carrying conductors.
Claim 3
Dependent Claim
29 words
The transmission line of claim 1 wherein each of said signal carrying conductors has a width W as measured between said parallel edges of each of said signal-carrying conductors.
Claim 4
Dependent Claim
28 words
The transmission line of claim 2 wherein each of said signal-carrying conductors and each of said ground-plane conductors has a square cross-sectional area equal to W 2 .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |