US3346861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sum-difference feed network
Assignee: RADIATION SYSTEMS Inc
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Filing: 1966-07-12
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Granted: 1967-10-10
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Expires: 1986-07-12
Abstract
No abstract record available.
Inventors
- 👤 George G Chadwick
- 👤 Shelton John Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:30
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/44; G01S13/4409
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A SUM-DIFFERENCE OF FEED NETWORK FOR A MONOPULSE SYSTEM HAVING A RADIATOR STRUCTURE WITH 2(2N+1) ARMS, WHERE N IS AN INTEGER GREATER THAN OR EQUAL TO ONE, SAID FEED NETWORK COMPRISING A PAIR OF HYBRID PHASING MATRICES EACH COUPLED TO A DIFFERENT SET OF (2N+1) ARMS OF SAID RADIATOR STRUCTURE, EACH SET CHARACTERIZED BY ARMS DISPOSED 180 DEGREES APART FROM THE ARMS OF THE OTHER SET, EACH OF SAID HYBRID PHASING MATRICES HAVING SUM AND DIFFERENCE MODE TERMINALS, AND POWER DIVIDING MENS SYMMETRICALLY COUPLED TO THE CORRESPONDING DIFFERENCE MODE TERMINALS OF EACH OF SAID MATRICES FOR EACH SENSE OF POLARIZATION.
Claim 2
Dependent Claim
100 words
A SUM-DIFFERENCE OF FEED NETWORK FOR A MONOPULSE SYSTEM HAVING A RADIATOR STRUCTURE WITH 2(2N+1) ARMS, WHERE N IS AN INTEGER GREATER THAN OR EQUAL TO ONE, SAID FEED NETWORK COMPRISING A PAIR OF HYBRID PHASING MATRICES EACH COUPLED TO A DIFFERENT SET OF (2N+1) ARMS OF SAID RADIATOR STRUCTURE, EACH SET CHARACTERIZED BY ARMS DISPOSED 180 DEGREES APART FROM THE ARMS OF THE OTHER SET, EACH OF SAID HYBRID PHASING MATRICES HAVING SUM AND DIFFERENCE MODE TERMINALS, AND POWER DIVIDING MENS SYMMETRICALLY COUPLED TO THE CORRESPONDING DIFFERENCE MODE TERMINALS OF EACH OF SAID MATRICES FOR EACH SENSE OF POLARIZATION.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |