US4881081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna orientation adjusting device for earth station
Assignee: NEC Corp
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Filing: 1989-02-17
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Granted: 1989-11-14
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Expires: 2009-02-17
Abstract
Abstract A device for adjusting the orientation of an antenna for an earth station. A received signal from the antenna is delivered from an outdoor unit to a demodulator of an indoor unit to be demodulated thereby. In the indoor unit, a converter receives an automatic gain controlled voltage signal from the demodulator and converts it into a digital signal, and a controller converts the digital signal into a predetermined control signal to feed it to the outdoor unit over the cable. In the outdoor unit, a display responsive to the control signal indicates a particular level which corresponds to the automatic gain controlled voltage. A person, therefore, can adjust the antenna to an optimum orientation unassisted, i.e., while observing the display.
Inventors
- 👤 Masashi Yoshihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:54
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/125; H01Q1/1257
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
212 words
A device comprising means for permitting a person in the vicinity of a common transmission-and-reception antenna to manually adjust the orientation of a reflecting surface of the antenna, where said antenna is included within an earth station that further includes indoor and outdoor units connected together solely by a solitary signal link used for both transmission and reception; said outdoor unit being located in the vicinity of said antenna; and said indoor unit having a demodulator for demodulating a signal that is received by said antenna and routed to said indoor unit through said solitary signal link and for applying automatic gain control to the received signal; said device further comprising; a converting means for converting an automatic gain controlled voltage signal output by said demodulator into a first signal; a control means for converting the first signal into a predetermined control signal and feeding the predetermined control signal to said outdoor unit through said solitary signal link; a display means electrically connected to the outdoor unit for viewing by the mentioned person and being responsive to the control signal for displaying a level which corresponds to the automatic gain controlled voltage; and disable means for preventing power from being radiated through said antenna when said control and display means are operating.
Claim 2
Independent Claim
212 words
A device comprising means for permitting a person in the vicinity of a common transmission-and-reception antenna to manually adjust the orientation of a reflecting surface of the antenna, where said antenna is included within an earth station that further includes indoor and outdoor units connected together solely by a solitary signal link used for both transmission and reception; said outdoor unit being located in the vicinity of said antenna; and said indoor unit having a demodulator for demodulating a signal that is received by said antenna and routed to said indoor unit through said solitary signal link and for applying automatic gain control to the received signal; said device further comprising; a converting means for converting an automatic gain controlled voltage signal output by said demodulator into a first signal; a control means for converting the first signal into a predetermined control signal and feeding the predetermined control signal to said outdoor unit through said solitary signal link; a display means electrically connected to the outdoor unit for viewing by the mentioned person and being responsive to the control signal for displaying a level which corresponds to the automatic gain controlled voltage; and disable means for preventing power from being radiated through said antenna when said control and display means are operating.
Claim 3
Dependent Claim
36 words
A device as claimed in claim 1, further comprising a first connector for detachably connecting said converting means to said indoor unit, and a second connector for detachably connecting said display means to said outdoor unit.
Claim 4
Dependent Claim
15 words
A device as claimed in claim 1, wherein said first signal is a digital signal.
Claim 5
Dependent Claim
26 words
A device as claimed in claim 3, wherein said converting means comprises an interface connected to said demodulator, and an analog-to-digital converter connected to said interface.
Claim 6
Dependent Claim
34 words
A device as claimed in claim 3, wherein said display means comprises a buffer connected to said outdoor unit, a digital-to-analog converter connected to said buffer, and a display connected to said digital-to-analog converter.
Claim 7
Dependent Claim
17 words
A device as claimed in claim 1, wherein said solitary signal link comprises a duplexer-to-cable-to duplexer arrangement.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |