US3564447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for simulating intermodulation distortion created between a plurality of radio frequency signals by environmental nonlinearities
Assignee: United States Department of the Navy
•
Filing: 1966-10-24
•
Granted: 1971-02-16
•
Expires: 1986-10-24
Abstract
Abstract A PLURALITY OF RADIO FREQUENCY SOURCES PROVIDE DIFFERENT DISCRETE RADIO FREQUENCY SIGNALS THAT ARE MIXED IN A NONLINEAR MIXING DEVICE THAT IS SELECTED TO SIMULATE THE EFFECT OF NATURALLY OCCURRING NONLINEAR JUNCTIONS IN A COMMUNICATIONS SYSTEM. THE RESULTING INTERMODULATION INTERFERENCE IS SUPPLIED TO A FREQUENCY MONITORING DEVICE WHEREIN THE INTERFERENCE MAY BE OBSERVED WHEREBY INTERFERENCE-FREE RECEIVING FREQUENCIES CAN BE SELECTED IN ACCORDANCE WITH THE RESULTS OF THE SIMULATION.
Inventors
- 👤 Walter M Chase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:51
CPC Classifications
G; G01; G01R; G01R23/00; G01R23/16; G01R23/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |