US4015223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
HF Antenna matching device
Assignee: Thales SA
•
Filing: 1976-01-21
•
Granted: 1977-03-29
•
Expires: 1996-01-21
Abstract
Abstract An antenna matching device comprises a directional coupler and, respectively connected, in a prior art manner, to two conjugate ports of the directional coupler, one of which is a high-power port, and the other of which a low-power port, a matching circuit in series with the antenna to be matched, and a matched load. A switching device makes it possible, during the matching phase, to reverse the connections of the aforementioned ports and thus to substitute the directional coupler low-power path for the high-power path in the link between the transmitter and the antenna.
Inventors
- 👤 Rene Cheze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:11
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/38; H03H7/40
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
132 words
A HF antenna matching device comprising: a directional coupler having first and second pairs of conjugate ports, said first pair having first and second ports, said second pair having a high-power port having a given coupling coefficient with said first port and a low-power port having a lower coupling coefficient with said first port, said first and second ports being adapted for respectively coupling to signal generating means and to measuring means during a matching phase a controllable matching circuit for being controlled as a function of the indications of said measuring means during a matching phase; a matched load; and a switching device for coupling the matching circuit to the high-power port and the matched load to the low-power port during a communication phase and vice versa during a matching phase.
Claim 2
Dependent Claim
132 words
A HF antenna matching device comprising: a directional coupler having first and second pairs of conjugate ports, said first pair having first and second ports, said second pair having a high-power port having a given coupling coefficient with said first port and a low-power port having a lower coupling coefficient with said first port, said first and second ports being adapted for respectively coupling to signal generating means and to measuring means during a matching phase a controllable matching circuit for being controlled as a function of the indications of said measuring means during a matching phase; a matched load; and a switching device for coupling the matching circuit to the high-power port and the matched load to the low-power port during a communication phase and vice versa during a matching phase.
Claim 3
Dependent Claim
40 words
A HF antenna matching device as claimed in claim 1, wherein said measuring means form part of the matching device and comprise a phase comparator circuit having two inputs respectively coupled to said second port and to said low-power port.
Claim 4
Dependent Claim
67 words
A HF antenna matching device as claimed in claim 2, wherein said control means also comprise: a voltage reducer circuit having an output and an input coupled to said signal generating means and whose reduction ratio is made equal to said lower coupling coefficient; and a voltage comparator circuit having two inputs respectively coupled to the output of said voltage reducer circuit and to said low-power port.
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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |