US3758882A
Expired / Lapsed
US
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Polarization converter for microwaves
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1971-11-11
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Granted: 1973-09-11
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Expires: 1991-11-11
Abstract
Abstract A microwave polarization converter for converting a linearly polarized wave into an elliptically, and particularly a circularly, polarized wave, the converter including a waveguide which propagates only two mutually orthogonal waves and coupling means disposed in the waveguide for coupling such orthogonal waves.
Inventors
- 👤 G Morz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:37
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/16; H01P1/161; H01P1/165; H01P1/17; H01P1/173
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
167 words
A polarization converter for microwaves in which a linearly polarized wave is fed into a waveguide, said polarization converter comprising a waveguide capable of propagating two independent mutually orthogonal waves and arranged to receive the linearly polarized wave, and a pAir of wave coupling means disposed in said waveguide along a plane oriented at an angle of 45* to the polarization directions of both such orthogonal waves, each wave coupling means of said pair extending in the direction of wave propagation for splitting a fed-in linearly polarized wave into two mutually perpendicular components lying diagonally to such polarization directions and for imparting respectively different phase shifts to such components, whereby at the end of said coupling means there are produced two orthogonal waves having the polarization directions which said waveguide is capable of propagating and differing from one another in phase, the resultant of the waves appearing at the end of said coupling means being a wave whose polarization direction rotates about the axis of said waveguide.
Claim 2
Dependent Claim
167 words
A polarization converter for microwaves in which a linearly polarized wave is fed into a waveguide, said polarization converter comprising a waveguide capable of propagating two independent mutually orthogonal waves and arranged to receive the linearly polarized wave, and a pAir of wave coupling means disposed in said waveguide along a plane oriented at an angle of 45* to the polarization directions of both such orthogonal waves, each wave coupling means of said pair extending in the direction of wave propagation for splitting a fed-in linearly polarized wave into two mutually perpendicular components lying diagonally to such polarization directions and for imparting respectively different phase shifts to such components, whereby at the end of said coupling means there are produced two orthogonal waves having the polarization directions which said waveguide is capable of propagating and differing from one another in phase, the resultant of the waves appearing at the end of said coupling means being a wave whose polarization direction rotates about the axis of said waveguide.
Claim 3
Dependent Claim
15 words
An arrangement as defined in claim 1 wherein said waveguide has a square cross section.
Claim 4
Dependent Claim
15 words
An arrangement as defined in claim 1 wherein said waveguide has a cruciform cross section.
Claim 5
Dependent Claim
24 words
An arrangement as defined in claim 1 wherein said waveguide comprises bars extending along the inner walls of said waveguide in the longitudinal direction.
Claim 6
Dependent Claim
36 words
An arrangement as defined in claim 1 wherein said waveguide has a circular cross section and comprises longitudinal bars extending along its inner wall to give the free interior of said waveguide a cruciform cross section.
Claim 7
Dependent Claim
31 words
An arrangement as defined in claim 1 wherein each said wave coupling means of said pair comprises a plurality of concentrated coupling elements spaced apart in the direction of wave propagation.
Claim 8
Dependent Claim
13 words
An arrangement as defined in claim 6 wherein said means comprise coupling pins.
Claim 9
Dependent Claim
15 words
An arrangement as defined in claim 6 wherein said means comprise lambda /4 coaxial resonators.
Claim 10
Dependent Claim
32 words
An arrangement as defined in claim 6 wherein said means comprise dielectric coupling pins which are inclined to a side of said waveguide and are perpendicular to the axis of said waveguide.
Claim 11
Dependent Claim
29 words
An arrangement as defined in claim 6 wherein said means comprise axially rotatable coupling pins which are oriented at a given angle about the longitudinal axis of the waveguide.
Claim 12
Dependent Claim
15 words
An arrangement as defined in claim 6 wherein said means comprise diagonally arranged coupling apertures.
Claim 13
Dependent Claim
28 words
An arrangement as defined in claim 1 wherein each said wave coupling means of said pair comprises a distributed coupling element extending in the direction of wave propagation.
Claim 14
Dependent Claim
24 words
An arrangement as defined in claim 12 wherein said means comrise at least one coupling bar disposed along an inner corner of said waveguide.
Claim 15
Dependent Claim
26 words
An arrangement as defined in claim 1 wherein said coupling means are constituted by said waveguide being deformed into a rhombic shape over its coupling length.
Claim 16
Dependent Claim
25 words
An arrangement as defined in claim 1 wherein said coupling means comprise a dielectric plate which is disposed in a diagonal plane of said waveguide.
Claim 17
Dependent Claim
28 words
An arrangement as defined in claim 15 wherein said plate is provided with a recess in the form of a swallowtail at least at one diagonally extending side.
Claim 18
Dependent Claim
28 words
An arrangement as defined in claim 1 wherein said wave coupling means are physically symmetrical with respect to a diagonal of the cross section of said wave guide.
Claim 19
Dependent Claim
129 words
A polarization converter for microwaves in which a linearly polarized wave is fed into a waveguide, said polarization converter comprising a waveguide which propagates only two independent mutually orthogonal waves and arranged to receive the linearly polarized wave, and wave coupling means disposed in said waveguide, said coupling means being of the distributed type and being constituted by a dielectric plate oriented at an angle of 45* to the polarization directions of both said orthogonal waves and extending in the direction of wave propagation, and longitudinal coatings of electrically conductive material disposed on said plate along the edges thereof which extend in the direction of wave propagation, said plate having a decreasing coupling attEnuation with increasing wave frequency and said coatings having increasing coupling attenuation with increasing wave frequency.
Claim 20
Dependent Claim
129 words
A polarization converter for microwaves in which a linearly polarized wave is fed into a waveguide, said polarization converter comprising a waveguide which propagates only two independent mutually orthogonal waves and arranged to receive the linearly polarized wave, and wave coupling means disposed in said waveguide, said coupling means being of the distributed type and being constituted by a dielectric plate oriented at an angle of 45* to the polarization directions of both said orthogonal waves and extending in the direction of wave propagation, and longitudinal coatings of electrically conductive material disposed on said plate along the edges thereof which extend in the direction of wave propagation, said plate having a decreasing coupling attEnuation with increasing wave frequency and said coatings having increasing coupling attenuation with increasing wave frequency.
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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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |