US3781684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-antenna repeater system utilizing hybrid transformers
Assignee: United States Department of the Army
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Filing: 1970-03-24
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Granted: 1973-12-25
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Expires: 1990-03-24
Abstract
Abstract One embodiment of this repeater comprises a multicoupler comprising three hybrid transformers for coupling a pair of transceivers to a single antenna, which may be simultaneously used without interference for transmitting and receiving of different frequencies, to relay signals between stations which would otherwise be out of range of each other. A pair of the multicouplers may be interconnected with another hybrid transformer to couple four transceivers to a single antenna.
Inventors
- 👤 H Inslerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:48
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/155; H04B1/00; H04B1/38; H04B1/40; H04B1/44; H04B1/48; H04B1/54
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
361 words
An airborne repeater for relaying messages between two ground receivers, each ground transceiver being tuned to a different frequency, said repeater comprising a first transmitter and a first receiver comprising a first transceiver tunable to the frequency of one of said ground transceivers, a second transmitter and a second receiver comprising a second transceiver tunable to the frequency of the other of said ground transceivers; a single antenna; means for connecting the output of said first receiver to the input of said second transmitter; means for connecting the output of said second receiver to the input of said first transmitter; a multicoupler for connecting said first and second transceivers to said single antenna whereby one of said receivers and the other of said transmitters of said transceivers may simultaneously use said antenna, said multicoupler comprising a first, a second, and a third hybrid transformers; each of said transformers having a pair of conjugate terminals, a sum terminal, and a difference terminal; said single antenna being connected to one of the conjugate terminals Of said first hybrid transformer; a matched load connected to the other conjugate terminal of said first hybrid transformer; means connecting the sum terminal of said second hyrid transformer to the sum terminal of said first hybrid transformer; means connecting the sum terminal of said third hybrid transformer to the difference terminal of said first hybrid transformer; means connecting the inputs of both receivers to the respective conjugate terminals of said second hybrid transformer, means connecting the outputs of both transmitters to the respective conjugate terminals of the third hybrid transformer; a first relay actuated by a detected carrier signal to said first receiver for disconnecting said second receiver from its conjugate terminal and for turning on said second transmitter during the time of the actuating signal; a second relay actuated by a detected carrier signal in said second receiver for disconnecting said first receiver from its conjugate terminal and for turning on said first transmitter during the time of the actuating signal; so that the receiver of one of said transceivers and the transmitter of the other of said transceivers may simultaneously use said antenna without mutual interference.
Claim 2
Dependent Claim
361 words
An airborne repeater for relaying messages between two ground receivers, each ground transceiver being tuned to a different frequency, said repeater comprising a first transmitter and a first receiver comprising a first transceiver tunable to the frequency of one of said ground transceivers, a second transmitter and a second receiver comprising a second transceiver tunable to the frequency of the other of said ground transceivers; a single antenna; means for connecting the output of said first receiver to the input of said second transmitter; means for connecting the output of said second receiver to the input of said first transmitter; a multicoupler for connecting said first and second transceivers to said single antenna whereby one of said receivers and the other of said transmitters of said transceivers may simultaneously use said antenna, said multicoupler comprising a first, a second, and a third hybrid transformers; each of said transformers having a pair of conjugate terminals, a sum terminal, and a difference terminal; said single antenna being connected to one of the conjugate terminals Of said first hybrid transformer; a matched load connected to the other conjugate terminal of said first hybrid transformer; means connecting the sum terminal of said second hyrid transformer to the sum terminal of said first hybrid transformer; means connecting the sum terminal of said third hybrid transformer to the difference terminal of said first hybrid transformer; means connecting the inputs of both receivers to the respective conjugate terminals of said second hybrid transformer, means connecting the outputs of both transmitters to the respective conjugate terminals of the third hybrid transformer; a first relay actuated by a detected carrier signal to said first receiver for disconnecting said second receiver from its conjugate terminal and for turning on said second transmitter during the time of the actuating signal; a second relay actuated by a detected carrier signal in said second receiver for disconnecting said first receiver from its conjugate terminal and for turning on said first transmitter during the time of the actuating signal; so that the receiver of one of said transceivers and the transmitter of the other of said transceivers may simultaneously use said antenna without mutual interference.
Claim 3
Dependent Claim
44 words
The airborne repeater of claim 1 wherein the modulation output of each of said receivers is connected to the corresponding transmitter of the other of said transceivers, for modulating the carrier of each of said transmitters with the received modulation of the other transceiver.
Claim 4
Dependent Claim
118 words
A repeater comprising a multicoupler for connecting first and second transceivers to a single antenna whereby the receiver of one of said transceivers and the transmitter of the other of said transceivers may simultaneously use said antenna, said multicoupler comprising three hybrid transformers, said antenna being connected to one of the conjugate terminals of one of said hybrid transformers, both of said transmitter outputs being connected to the difference terminal of said one of said hybrid transformers via another of said hybrid transformers and wherein both of the receivers of said first and second transceivers are connected to the sum terminal of said one of said hybrid transformers via still another of said three of said hybrid transformers.
Claim 5
Dependent Claim
118 words
A repeater comprising a multicoupler for connecting first and second transceivers to a single antenna whereby the receiver of one of said transceivers and the transmitter of the other of said transceivers may simultaneously use said antenna, said multicoupler comprising three hybrid transformers, said antenna being connected to one of the conjugate terminals of one of said hybrid transformers, both of said transmitter outputs being connected to the difference terminal of said one of said hybrid transformers via another of said hybrid transformers and wherein both of the receivers of said first and second transceivers are connected to the sum terminal of said one of said hybrid transformers via still another of said three of said hybrid transformers.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |