US5592177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarization-rotation modulated, spread polarization-rotation, wide-bandwidth radio-wave communications system
Assignee: Autometric Inc
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Filing: 1993-06-11
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Granted: 1997-01-07
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Expires: 2013-06-11
Abstract
Abstract A wide bandwidth radio wave communication system having a dual feed pair of cross-polarized antennas having a common axis and being at orthogonal angles to each other. A source of RF signals is coupled to the antennas and a shifter device is between at least one of the pair of cross-polarized antennas and the source of RF signals for modulating the polarization of RF signals launched by the pair of cross-polarized antennas.
Inventors
- 👤 Terence W. Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:06
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/10; H01; H01Q; H01Q21/00; H01Q21/24; H01Q21/245; H01Q21/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A radio wave communication system comprising: a source of RF signals, a dual feed pair of cross polarized antennas having a common axis and being at orthogonal angles to each other relative to said common axis, and means for coupling said source of RF signals to said pair of cross-polarized antennas including phase modulation means connected between at least one of said pair of cross-polarized antennas and said source for modulating the polarization of RF signals launched by said pair of cross-polarized antennas with an information signal.
Claim 2
Dependent Claim
87 words
A radio wave communication system comprising: a source of RF signals, a dual feed pair of cross polarized antennas having a common axis and being at orthogonal angles to each other relative to said common axis, and means for coupling said source of RF signals to said pair of cross-polarized antennas including phase modulation means connected between at least one of said pair of cross-polarized antennas and said source for modulating the polarization of RF signals launched by said pair of cross-polarized antennas with an information signal.
Claim 3
Dependent Claim
47 words
A radio wave communication system as defined in claim 1 including a receiver pair of cross-polarized antennas having a common axis for receiving radio waves launched by said first mentioned pair of cross-polarized antennas and being at said orthogonal angles to each other relative to said axis.
Claim 4
Dependent Claim
22 words
A radio wave communication system as defined in claim 1 or claim 2 in which said radio wave is a continuous wave.
Claim 5
Dependent Claim
20 words
A radio wave communication system as defined in claim 1 or claim 2 in which said radio wave is pulsed.
Claim 6
Dependent Claim
39 words
A radio wave communication system as defined in claim 1 or claim 2 wherein said phase modulation means cause the polarization of RF signals to effectively rotate the said common axis of said first mentioned pair of cross-polarized antennas.
Claim 7
Dependent Claim
22 words
A radio wave communication system as defined in claim 1 or claim 2 wherein said phase modulation means includes a phase shifter.
Claim 8
Dependent Claim
50 words
A radio wave communication system as defined in claim 1 or claim 2 wherein said means to phase modulate includes a low loss dispersionless delay in line providing phase delays of fractions of a degree over discrete intervals of time, and cross-correlation means for detecting said fractions of phase delay.
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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) | 2000-01-07 | 2000-07-08 | 2001-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-07 | 2004-07-08 | 2005-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-07 | 2008-07-08 | 2009-01-07 | $7700.00 | Window Closed / Lapsed |