US3191173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency diversity radar with "and" circuit signal selection
Assignee: Siemens Schweiz AG
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Filing: 1962-08-21
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Granted: 1965-06-22
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Expires: 1982-08-21
Abstract
No abstract record available.
Inventors
- 👤 Farner Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:58
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/42; G01S7/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A FREQUENCY DIVERSITY RADAR IN WHICH A PAIR OF VIDEO FREQUENCY SIGNALS, EACH CORRESPONDING TO A RESPECTIVE ONE OF A PAIR OF REFLECTED IMPULSE MODULATED HIGH FREQUENCY WAVES HAVING WIDELY SPACED RELATIVE FREQUENCIES, ARE FED TO THE INPUTS OF A CORRELATOR WHICH DERIVES, AT ITS OUTPUT, THE SIGNAL HAVING THE SMALLER AMPLITUDE; THE IMPROVEMENT COMPRISING A PAIR OF INDEPENDENT AMPLIFIER VALVES; MEANS FOR APPLYING EACH OF THE TWO VIDEO FREQUENCIES TO THE INPUT OF A RESPECTIVE VALVE, THE TWO VIDEO FREQUENCIES BEING SO APPLIED SUBSTANTIALLY SIMULTANEOUSLY; AND AN "AND" CIRCUIT CONNECTED TO THE OUTPUTS OF SAID VALVES AND TO AN OUTPUT TERMINAL, SAID "AND" CIRCUIT DERVING THE SIGNAL HAVING THE LESSER AMPLITUDE AND SUPPLYING IT TO SAID OUTPUT TERMINAL.
Claim 2
Dependent Claim
120 words
IN A FREQUENCY DIVERSITY RADAR IN WHICH A PAIR OF VIDEO FREQUENCY SIGNALS, EACH CORRESPONDING TO A RESPECTIVE ONE OF A PAIR OF REFLECTED IMPULSE MODULATED HIGH FREQUENCY WAVES HAVING WIDELY SPACED RELATIVE FREQUENCIES, ARE FED TO THE INPUTS OF A CORRELATOR WHICH DERIVES, AT ITS OUTPUT, THE SIGNAL HAVING THE SMALLER AMPLITUDE; THE IMPROVEMENT COMPRISING A PAIR OF INDEPENDENT AMPLIFIER VALVES; MEANS FOR APPLYING EACH OF THE TWO VIDEO FREQUENCIES TO THE INPUT OF A RESPECTIVE VALVE, THE TWO VIDEO FREQUENCIES BEING SO APPLIED SUBSTANTIALLY SIMULTANEOUSLY; AND AN "AND" CIRCUIT CONNECTED TO THE OUTPUTS OF SAID VALVES AND TO AN OUTPUT TERMINAL, SAID "AND" CIRCUIT DERVING THE SIGNAL HAVING THE LESSER AMPLITUDE AND SUPPLYING IT TO SAID OUTPUT TERMINAL.
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |