US3928853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decoupling apparatus for a common-antenna receive-transmit system
Assignee: United States Department of the Navy
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Filing: 1974-11-29
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Granted: 1975-12-23
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Expires: 1994-11-29
Abstract
Abstract In communications systems, decoupling apparatus for enabling the use of a common antenna to simultaneously perform transmit and receive functions. Inductive and capacitive decoupling circuits in the apparatus provide decoupling from a common transmitting antenna in a manner substantially independent of transmittermulticoupler off-resonance impedance and further provide decoupling as a function of frequency whereby the communications system is atmospheric-noise limited over the frequency band of interest.
Inventors
- 👤 Irving C Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:16
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
Communication system apparatus comprising: reciprocal antenna means; a first multicoupler means having input means and output means; a plurality of transmitter means connected to the input means of said first multicoupler means; a second multicoupler means having input means and output means; a plurality of receiver means connected to the output means of said second multicoupler means; non-resonant means having a first port connected to the output means of said first multicoupler, a second port connected to the input means of said second multicoupler, and a third port connected to said antenna means, said non-resonant means comprising capacitive means connected between said second and third ports, first inductive means connected between said first and third ports and a second inductive means connected between said second port and ground and being magnetically coupled to said first inductive means whereby said capacitive means and said second inductive means decouple received energy from said antenna means to said second multicoupler means over a predetermined frequency range substantially independent of the impedance of said first multicoupler means and said first inductive means simultaneously couples energy from said first multicoupler means to said antenna means.
Claim 2
Dependent Claim
190 words
Communication system apparatus comprising: reciprocal antenna means; a first multicoupler means having input means and output means; a plurality of transmitter means connected to the input means of said first multicoupler means; a second multicoupler means having input means and output means; a plurality of receiver means connected to the output means of said second multicoupler means; non-resonant means having a first port connected to the output means of said first multicoupler, a second port connected to the input means of said second multicoupler, and a third port connected to said antenna means, said non-resonant means comprising capacitive means connected between said second and third ports, first inductive means connected between said first and third ports and a second inductive means connected between said second port and ground and being magnetically coupled to said first inductive means whereby said capacitive means and said second inductive means decouple received energy from said antenna means to said second multicoupler means over a predetermined frequency range substantially independent of the impedance of said first multicoupler means and said first inductive means simultaneously couples energy from said first multicoupler means to said antenna means.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |