US3768043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wideband hybrid system
Assignee: RCA Corp
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Filing: 1973-01-05
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Granted: 1973-10-23
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Expires: 1993-01-05
Abstract
Abstract An input diplexer separates wide frequency range signals by frequency to provide, at a plurality of outputs, signals within different narrow frequency bands. A plurality of quadrature hybrids are adapted so that each hybrid achieves equal power division and 90* relative phase shift with low distortion over one of the narrow frequency bands. A hybrid is coupled to each output of the input diplexer. Output diplexers are coupled to the two outputs of each of the hybrids to combine the power divided narrow frequency band signals into two wide frequency band signals of substantially equal power and of 90* differential phase.
Inventors
- 👤 P Foldes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:51
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
267 words
A system for providing substantially equal power splitting and 90* relative phase shift of power divided signals over a given relatively wide band of frequencies with reduced amplitude and phase error comprising: a first diplexer responsive to signals of said given wide band of frequencies at its input for separating said signals by frequency to provide at a plurality of first diplexer output terminals signals within different narrow frequency bands where the sum of said narrow frequency bands covers the frequency spectrum of said given wide band of frequencies, a plurality of quadrature hybrids, each hybrid coupled to a different one of said plurality of first diplexer output terminals and adapted to provide equal power splitting to first and second hybrid output terminals with signals at the first hybrid output terminal undergoing 90* less phase shift than the signals at the second hybrid output terminal with minimum error over the coupled relatively narrow frequency band, a second diplexer coupled to said first hybrid output terminal of each of said plurality of hybrids and being responsive to said signals within each of said narrow frequency bands for providing at the second diplexer output terminal wide frequency band signals of a given power level and phase, a third diplexer coupled to the second hybrid output terminal of each of said plurality of hybrids and being responsive to said signals within each of said narrow frequency bands for providing at the third diplexer output terminal said wide frequency band signals of a power level substantialLy equal to said given power level and at 90* relative phase to said given phase.
Claim 2
Independent Claim
267 words
A system for providing substantially equal power splitting and 90* relative phase shift of power divided signals over a given relatively wide band of frequencies with reduced amplitude and phase error comprising: a first diplexer responsive to signals of said given wide band of frequencies at its input for separating said signals by frequency to provide at a plurality of first diplexer output terminals signals within different narrow frequency bands where the sum of said narrow frequency bands covers the frequency spectrum of said given wide band of frequencies, a plurality of quadrature hybrids, each hybrid coupled to a different one of said plurality of first diplexer output terminals and adapted to provide equal power splitting to first and second hybrid output terminals with signals at the first hybrid output terminal undergoing 90* less phase shift than the signals at the second hybrid output terminal with minimum error over the coupled relatively narrow frequency band, a second diplexer coupled to said first hybrid output terminal of each of said plurality of hybrids and being responsive to said signals within each of said narrow frequency bands for providing at the second diplexer output terminal wide frequency band signals of a given power level and phase, a third diplexer coupled to the second hybrid output terminal of each of said plurality of hybrids and being responsive to said signals within each of said narrow frequency bands for providing at the third diplexer output terminal said wide frequency band signals of a power level substantialLy equal to said given power level and at 90* relative phase to said given phase.
Claim 3
Dependent Claim
329 words
A wideband polarizer for providing circularly polarized waves from linearly polarized waves over a given wide band of frequencies with low axial ratio comprising: a first diplexer responsive to the linearly polarized signals over the given wide band of frequencies at its input for separating said linearly polarized signals by frequency to provide at a plurality of first diplexer output terminals linearly polarized signals within different narrow frequency bands where the sum of said narrow frequency bands covers the frequency spectrum of said given wide band of frequencies, a plurality of quadrature hybrids, each hybrid coupled to a different one of said plurality of first diplexer output terminals and adapted to provide equal power splitting to first and second output hybrid terminals with linearly polarized signals at the first hybrid output terminal undergoing 90* less phase shift than the linearly polarized signals at the second hybrid output terminal with minimum error over the coupled relatively narrow frequency band, a second diplexer coupled to said first hybrid output terminal of each of said plurality of hybrids and being responsive to said linearly polarized signals within each of said narrow frequency bands for providing at the second diplexer output terminal wide frequency band linearly polarized signals of a given power level and phase, a third diplexer coupled to the second hybrid output terminal of each of said plurality of hybrids and being responsive to said linearly polarized signals within each of said narrow frequency bands coupled thereto for providing at the third diplexer output terminal said wide frequency band linearly polarized signals of a power level substantially equal to said given power level and at 90* relative phase to said given phase, an orthogonal coupler having a first terminal coupled to the second diplexer output terminal and an orthogonally oriented second terminal coupled to the third diplexer output terminal and responsive to linearly polarized signals for providing circularly polarized waves over said wide band of frequencies with substantially low axial ratio.
Claim 4
Dependent Claim
329 words
A wideband polarizer for providing circularly polarized waves from linearly polarized waves over a given wide band of frequencies with low axial ratio comprising: a first diplexer responsive to the linearly polarized signals over the given wide band of frequencies at its input for separating said linearly polarized signals by frequency to provide at a plurality of first diplexer output terminals linearly polarized signals within different narrow frequency bands where the sum of said narrow frequency bands covers the frequency spectrum of said given wide band of frequencies, a plurality of quadrature hybrids, each hybrid coupled to a different one of said plurality of first diplexer output terminals and adapted to provide equal power splitting to first and second output hybrid terminals with linearly polarized signals at the first hybrid output terminal undergoing 90* less phase shift than the linearly polarized signals at the second hybrid output terminal with minimum error over the coupled relatively narrow frequency band, a second diplexer coupled to said first hybrid output terminal of each of said plurality of hybrids and being responsive to said linearly polarized signals within each of said narrow frequency bands for providing at the second diplexer output terminal wide frequency band linearly polarized signals of a given power level and phase, a third diplexer coupled to the second hybrid output terminal of each of said plurality of hybrids and being responsive to said linearly polarized signals within each of said narrow frequency bands coupled thereto for providing at the third diplexer output terminal said wide frequency band linearly polarized signals of a power level substantially equal to said given power level and at 90* relative phase to said given phase, an orthogonal coupler having a first terminal coupled to the second diplexer output terminal and an orthogonally oriented second terminal coupled to the third diplexer output terminal and responsive to linearly polarized signals for providing circularly polarized waves over said wide band of frequencies with substantially low axial ratio.
Claim 5
Dependent Claim
23 words
The combination claimed in claim 2, wherein said first, second and third diplexers include band-pass filters coupled to the terminals of said hybrids.
Claim 6
Dependent Claim
23 words
The combination claimed in claim 3 wherein all of the band-pass filters coupled to a given one of said hybrids are substantially identical.
Claim 7
Dependent Claim
13 words
The combination claimed in claim 2, wherein said hybrids are short slot hybrids.
References Cited (Backward Citations)
US2727141A
Cited
US3056096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |