Patent US5489869A successfully refreshed from Google Patents.
US5489869A
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Antenna control unit attenuator and Bi-phase modulator
Assignee: Boeing North American Inc
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Filing: 1994-05-17
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Granted: 1996-02-06
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Expires: 2014-05-17
Abstract
Abstract An apparatus and method for performing spatial nulling in antenna electronics that provides an integrated solution of signal attenuation and bi-phase modulation. One implementation is comprised of load resistors and field-effect-transistors in a gallium arsenide component configured in such fashion as to provide attenuation and bi-phase capability in response to coupled control signals.
Inventors
- 👤 Mark M. Mulbrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:18
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0837; H04B7/0842; H04B7/086; G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/2813; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/2605; H01Q3/2611
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
An apparatus for use in antenna interface circuity comprising: a first attenuating coupled to a voltage input signal and a first control signal; a second attenuator coupled to a second voltage input signal and a second control signal; and a dual current source coupled to each attenuator; means for switching coupled to the first and second control signal; wherein the first and second voltage signals are 180 degrees apart and that the by switching the signals to the attenuators the apparatus is bi-phase; and wherein the first and second attenuators are comprised of paired differential amplifiers.
Claim 2
Independent Claim
96 words
An apparatus for use in antenna interface circuity comprising: a first attenuating coupled to a voltage input signal and a first control signal; a second attenuator coupled to a second voltage input signal and a second control signal; and a dual current source coupled to each attenuator; means for switching coupled to the first and second control signal; wherein the first and second voltage signals are 180 degrees apart and that the by switching the signals to the attenuators the apparatus is bi-phase; and wherein the first and second attenuators are comprised of paired differential amplifiers.
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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) | 1999-02-05 | 1999-08-07 | 2000-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-05 | 2003-08-07 | 2004-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-05 | 2007-08-07 | 2008-02-06 | $7700.00 | Window Closed / Lapsed |