Patent US4893098A successfully refreshed from Google Patents.
US4893098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
90 Degree broadband MMIC hybrid
Assignee: Voice Signals LLC
•
Filing: 1988-12-05
•
Granted: 1990-01-09
•
Expires: 2008-12-05
Abstract
Abstract A 90 degree hybrid is contemplated having three parallel signal paths, one of the signal paths is a central signal path which provides direct impedence to ground. The other two signal paths are capacitively coupled to the central signal path to provide a second impedence. Each signal path incorporates at least one inductor coupled in series along each of the signal paths. The signal paths are capacitively coupled to each other at each end of the inductors. To increase the bandwidth, additional hybrids are coupled in series, with each hybrid forming a section of the broadband hybrid.
Inventors
- 👤 Warren L. Seely
- 👤 Joseph Staudinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:28
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
A four terminal broadband 0/90 degree hybrid comprising: a plurality of signal path means for transforming the impedance and phasing of an input signal; a first of said signal path means capacitively coupled to an electric ground to form a central signal path; said central signal path means for providing an impedance to said ground; a second and third of said signal path means having ends providing the terminals of the 0/90 degree hybrid coupled to said central signal path through a plurality of capacitance means; and said plurality of capacitance means for providing an impedance to said central signal path from said second and third signal path means.
Claim 2
Dependent Claim
109 words
A four terminal broadband 0/90 degree hybrid comprising: a plurality of signal path means for transforming the impedance and phasing of an input signal; a first of said signal path means capacitively coupled to an electric ground to form a central signal path; said central signal path means for providing an impedance to said ground; a second and third of said signal path means having ends providing the terminals of the 0/90 degree hybrid coupled to said central signal path through a plurality of capacitance means; and said plurality of capacitance means for providing an impedance to said central signal path from said second and third signal path means.
Claim 3
Dependent Claim
30 words
A four terminal broadband 0/90 degree hybrid according to claim 1 wherein each of said signal path means comprises: at least one inductance means coupled along said signal path means.
Claim 4
Dependent Claim
22 words
A four terminal broadband 0/90 degree hybrid according to claim 2 wherein at least one of said inductance means comprises an inductor.
Claim 5
Dependent Claim
22 words
A four terminal broadband 0/90 degree hybrid according to claim 1 wherein each of said plurality of capacitance means comprises a capacitor.
References Cited (Backward Citations)
US1211822A
Cited
US3048798A
Cited
US3555461A
Cited
US3484724A
Cited
US3539948A
Cited
US4216446A
Cited
EP0151784A2
Cited
US4556856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |