US3733607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-jamming apparatus
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1958-10-03
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Granted: 1973-05-15
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Expires: 1978-10-03
Abstract
Abstract A linearly polarized wanted signal is separated from a nonlinearly polarized unwanted signal by transforming the wanted signal to a non-linearly polarized signal and the unwanted signal to a linearly polarized signal and transmitting these signals to a polarized filter to pass only t he component of the wanted signal orthogonal to the unwanted signal.
Inventors
- 👤 E Bobrow
- 👤 L Murdock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:59
CPC Classifications
H; H04; H04K; H04K3/00; H04K3/80; H04K3/82; H04K3/825; G; G01; G01S; G01S7/00; G01S7/02; G01S7/024; G01S7/36; H04K3/20; H04K3/22; H04K3/224; H04K3/228; H04K2203/00; H04K2203/10; H04K2203/14
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
74 words
Apparatus for separating wanted from unwanted signals where said signals are respectively linearly and non-linearly polarized, said apparatus comprising: means for simultaneously transforming the unwanted non-linearly polarized signal to an unwanted linearly polarized signal and the wanted linearly polarized signal to a wanted non-linearly polarized signal; and polarization sensitive means for passing only the component of the non-linearly polarized wanted signal whose polarization is substantially orthogonal to that of the unwanted linearly polarized signal.
Claim 2
Dependent Claim
74 words
Apparatus for separating wanted from unwanted signals where said signals are respectively linearly and non-linearly polarized, said apparatus comprising: means for simultaneously transforming the unwanted non-linearly polarized signal to an unwanted linearly polarized signal and the wanted linearly polarized signal to a wanted non-linearly polarized signal; and polarization sensitive means for passing only the component of the non-linearly polarized wanted signal whose polarization is substantially orthogonal to that of the unwanted linearly polarized signal.
Claim 3
Dependent Claim
74 words
Apparatus for separating wanted from unwanted signals where said signals are respectively linearly and elliptically polarized, said apparatus comprising: means for simultaneously transforming the unwanted elliptically polarized signal to an unwanted linearly polarized signal and the wanted linearly polarized signal to a wanted elliptically polarized signal; and polarization sensitive means for passing only the component of the elliptically polarized wanted signal whose polarization is substantially orthogonal to that of the unwanted linearly polarized signal.
Claim 4
Dependent Claim
74 words
Apparatus for separating wanted from unwanted signals where said signals are respectively linearly and elliptically polarized, said apparatus comprising: means for simultaneously transforming the unwanted elliptically polarized signal to an unwanted linearly polarized signal and the wanted linearly polarized signal to a wanted elliptically polarized signal; and polarization sensitive means for passing only the component of the elliptically polarized wanted signal whose polarization is substantially orthogonal to that of the unwanted linearly polarized signal.
Claim 5
Dependent Claim
81 words
Apparatus for separating wanted from unwanted signals where said signals are respectively linearly and elliptically polarized, said apparatus comprising: means for shifting by 90* the phase of the wanted and unwanted signal components that are polarized perpendicularly to an axis of the ellipse of polarization of theunwanted signal to produce a linearly polarized unwanted signal and an elliptically polarized wanted signal; and polarization sensitive means for passing only the component of the elliptically polarized wanted signal whose polarization is substantially orthogonal.
Claim 6
Dependent Claim
81 words
Apparatus for separating wanted from unwanted signals where said signals are respectively linearly and elliptically polarized, said apparatus comprising: means for shifting by 90* the phase of the wanted and unwanted signal components that are polarized perpendicularly to an axis of the ellipse of polarization of theunwanted signal to produce a linearly polarized unwanted signal and an elliptically polarized wanted signal; and polarization sensitive means for passing only the component of the elliptically polarized wanted signal whose polarization is substantially orthogonal.
Claim 7
Dependent Claim
73 words
Apparatus for separating wanted from unwanted signals where said signals are respectively linearly and circularly polarized, said apparatus comprising: means for simultaneously transforming the unwanted circularly polarized signal to an unwanted linearly polarized signal and the wanted linearly polarized signal to a wanted elliptically polarized signal; and polarization sensitive means for passing only the component of the elliptically polarized wanted signal whose polarization is substantially orthogonal to the polarization of the unwanted signal.
Claim 8
Dependent Claim
73 words
Apparatus for separating wanted from unwanted signals where said signals are respectively linearly and circularly polarized, said apparatus comprising: means for simultaneously transforming the unwanted circularly polarized signal to an unwanted linearly polarized signal and the wanted linearly polarized signal to a wanted elliptically polarized signal; and polarization sensitive means for passing only the component of the elliptically polarized wanted signal whose polarization is substantially orthogonal to the polarization of the unwanted signal.
Claim 9
Dependent Claim
92 words
Apparatus for separating wanted from unwanted signals where said signals are respectively linearly and circularly polarized, said apparatus comprising: means for shifting by 90* the phase of the wanted and unwanted signal components that are polarized perpendicularly to a selected diameter of the circle of polarization of the unwanted signal to produce a linearly polarized unwanted signal and an elliptically polarized wanted signal; and polarization sensitive means for passing only the component of the elliptically polarized wanted signal whose polarization is substantially orthogonal to the polarization of the linearly polarized unwanted signal.
Claim 10
Dependent Claim
92 words
Apparatus for separating wanted from unwanted signals where said signals are respectively linearly and circularly polarized, said apparatus comprising: means for shifting by 90* the phase of the wanted and unwanted signal components that are polarized perpendicularly to a selected diameter of the circle of polarization of the unwanted signal to produce a linearly polarized unwanted signal and an elliptically polarized wanted signal; and polarization sensitive means for passing only the component of the elliptically polarized wanted signal whose polarization is substantially orthogonal to the polarization of the linearly polarized unwanted signal.
Claim 11
Dependent Claim
157 words
Square waveguide apparatus for separating wanted from unwanted signals where said signals are respectively linearly and elliptically polarized, said apparatus comprising: antenna means adapted to receive the linearly and elliptically polarized wanted and unwanted signals, respectively; means for rotating the polarizations of the signals relative to the waveguide to align the major axis of the ellipse of polarization of the unwanted signal with a predetermined axis of the waveguide; phase shifter means for shifting by 90* the phase of the wanted and unwanted signal components that are polarized perpendicularly to said waveguide axis to produce a linearly polarized unwanted signal and an elliptically polarized wanted signal; additional means for rotating the polarization of the signals relative to the waveguide to align the polarization of the linearly polarized unwanted signal with said waveguide axis, said additional means including mode-coupler means for passing the component of the elliptically polarized wanTed signal that is polarized orthogonally to said waveguide axis.
Claim 12
Dependent Claim
157 words
Square waveguide apparatus for separating wanted from unwanted signals where said signals are respectively linearly and elliptically polarized, said apparatus comprising: antenna means adapted to receive the linearly and elliptically polarized wanted and unwanted signals, respectively; means for rotating the polarizations of the signals relative to the waveguide to align the major axis of the ellipse of polarization of the unwanted signal with a predetermined axis of the waveguide; phase shifter means for shifting by 90* the phase of the wanted and unwanted signal components that are polarized perpendicularly to said waveguide axis to produce a linearly polarized unwanted signal and an elliptically polarized wanted signal; additional means for rotating the polarization of the signals relative to the waveguide to align the polarization of the linearly polarized unwanted signal with said waveguide axis, said additional means including mode-coupler means for passing the component of the elliptically polarized wanTed signal that is polarized orthogonally to said waveguide axis.
Claim 13
Dependent Claim
64 words
The apparatus defined in claim 6 wherein said antenna means includes a waveguide; a parabolic reflector mounted on said waveguide at one end thereof; and a splash plate mounted substantially at the focal point of said parabolic reflector and oriented to face said one end for reflecting toward said one end the wanted and unwanted signal energy incident upon said reflector and reflected therefrom.
Claim 14
Dependent Claim
124 words
Square waveguide apparatus for separating wanted from unwanted signals where said signals are respectively linearly and circularly polarized, said apparatus comprising: antenna means for receiving the linearly and circularly polarized wanted and unwanted signals, respectively; means for shifting by 90* the phase of the wanted and unwanted signal components that are polarized perpendicularly to a predetermined axis of the waveguide to produce a linearly polarized unwanted signal and an elliptically polarized wanted signal; additional means for rotating the polarizations of the signals relative to the waveguide to align the polarization of the linearly polarized unwanted signal with said waveguide axis, said additional means including mode-coupler means for passing the component of the elliptically polarized wanted signal that is polarized orthogonally to said waveguide axis.
Claim 15
Dependent Claim
124 words
Square waveguide apparatus for separating wanted from unwanted signals where said signals are respectively linearly and circularly polarized, said apparatus comprising: antenna means for receiving the linearly and circularly polarized wanted and unwanted signals, respectively; means for shifting by 90* the phase of the wanted and unwanted signal components that are polarized perpendicularly to a predetermined axis of the waveguide to produce a linearly polarized unwanted signal and an elliptically polarized wanted signal; additional means for rotating the polarizations of the signals relative to the waveguide to align the polarization of the linearly polarized unwanted signal with said waveguide axis, said additional means including mode-coupler means for passing the component of the elliptically polarized wanted signal that is polarized orthogonally to said waveguide axis.
Claim 16
Dependent Claim
64 words
The apparatus defined in claim 8 wherein said antenna means includes a waveguide; a parabolic reflector mounted on said waveguide at one end thereof; and a splash plate mounted substantially at the focal point of said parabolic reflector and oriented to face said one end for reflecting toward said one end the wanted and unwanted signal energy incident upon said reflector and reflected therefrom.
Claim 17
Independent Claim
97 words
A method of separating wanted from unwanted signals where said signals are respectively linearly and elliptically polarized, said method comprising the steps of: transforming the linearly polarized wanted signal to an elliptically polarized signal and simultaneously transforming the elliptically polarized unwanted signal to a linearly polarized signal; and coupling off all components of the wanted and unwanted signals that are polarized in the direction of polarization of said linearly polarized unwanted signal, thereby to pass only the component of the elliptically polarized wanted signal that is polarized orthogonally to the direction of polarization of said unwanted signal.
Claim 18
Independent Claim
97 words
A method of separating wanted from unwanted signals where said signals are respectively linearly and elliptically polarized, said method comprising the steps of: transforming the linearly polarized wanted signal to an elliptically polarized signal and simultaneously transforming the elliptically polarized unwanted signal to a linearly polarized signal; and coupling off all components of the wanted and unwanted signals that are polarized in the direction of polarization of said linearly polarized unwanted signal, thereby to pass only the component of the elliptically polarized wanted signal that is polarized orthogonally to the direction of polarization of said unwanted signal.
Claim 19
Independent Claim
97 words
A method of separating wanted from unwanted signals where said signals are respectively linearly and circularly polarized, said method comprising the steps of: transforming the linearly polarized wanted signal to an elliptically polarized signal and simultaneously transforming the circularly polarized unwanted signal to a linearly polarized signal; and coupling off all components of the wanted and unwanted signals that are polarized in the direction of polarization of said linearly polarized unwanted signal, thereby to pass only the component of the elliptically polarized wanted signal that is polarized orthogonally to the direction of polarization of said unwanted signal.
Claim 20
Independent Claim
97 words
A method of separating wanted from unwanted signals where said signals are respectively linearly and circularly polarized, said method comprising the steps of: transforming the linearly polarized wanted signal to an elliptically polarized signal and simultaneously transforming the circularly polarized unwanted signal to a linearly polarized signal; and coupling off all components of the wanted and unwanted signals that are polarized in the direction of polarization of said linearly polarized unwanted signal, thereby to pass only the component of the elliptically polarized wanted signal that is polarized orthogonally to the direction of polarization of said unwanted signal.
Claim 21
Independent Claim
166 words
A method of separating wanted from unwanted signals propagated through square waveguide apparatus where said signals are respectively linearly and elliptically polarized, said method comprising the steps of: rotating the polarizations of the signals until the major axis of the ellipse of polarization of the unwanted signal is aligned with a predetermined axis of the waveguide; shifting by 90* the phase of the wanted and unwanted signal components that are polarized perpendicularly to said waveguide axis, thereby to transform the elliptically polarized unwanted signal to a linearly polarized unwanted signal and the linearly polarized wanted signal to an elliptically polarized wanted signal; rotating the polarizations of the signals until the direction of polarization of the linearly polarized unwanted signal is aligned with said waveguide axis; and filtering off all components of the wanted and unwanted signals that are polarized in the direction of said waveguide axis, thereby to pass only the component of the elliptically polarized wanted signal that is polarized orthogonally to said waveguide axis.
Claim 22
Independent Claim
166 words
A method of separating wanted from unwanted signals propagated through square waveguide apparatus where said signals are respectively linearly and elliptically polarized, said method comprising the steps of: rotating the polarizations of the signals until the major axis of the ellipse of polarization of the unwanted signal is aligned with a predetermined axis of the waveguide; shifting by 90* the phase of the wanted and unwanted signal components that are polarized perpendicularly to said waveguide axis, thereby to transform the elliptically polarized unwanted signal to a linearly polarized unwanted signal and the linearly polarized wanted signal to an elliptically polarized wanted signal; rotating the polarizations of the signals until the direction of polarization of the linearly polarized unwanted signal is aligned with said waveguide axis; and filtering off all components of the wanted and unwanted signals that are polarized in the direction of said waveguide axis, thereby to pass only the component of the elliptically polarized wanted signal that is polarized orthogonally to said waveguide axis.
Claim 23
Independent Claim
139 words
A method of separating wanted from unwanted signals propagated through square waveguide apparatus where said signals are respectively linearly and circularly polarized, said method comprising the steps of: shifting by 90* the phase of the wanted and unwanted signal components that are polarized perpendicularly to a diameter of the circular polarization of the unwanted signal that coincides with a predetermined axis of the waveguide, thereby to transform the linearly polarized wanted signal to an elliptically polarized signal and the circularly polarized unwanted signal to a linearly polarized signal whose direction of polarization is aligned with said waveguide axis; and filtering off all components of the wanted and unwanted signals that are polarized in the direction of said waveguide axis, thereby to pass only the component of the elliptically polarized wanted signal that is polarized orthogonally to said waveguide axis.
Claim 24
Independent Claim
139 words
A method of separating wanted from unwanted signals propagated through square waveguide apparatus where said signals are respectively linearly and circularly polarized, said method comprising the steps of: shifting by 90* the phase of the wanted and unwanted signal components that are polarized perpendicularly to a diameter of the circular polarization of the unwanted signal that coincides with a predetermined axis of the waveguide, thereby to transform the linearly polarized wanted signal to an elliptically polarized signal and the circularly polarized unwanted signal to a linearly polarized signal whose direction of polarization is aligned with said waveguide axis; and filtering off all components of the wanted and unwanted signals that are polarized in the direction of said waveguide axis, thereby to pass only the component of the elliptically polarized wanted signal that is polarized orthogonally to said waveguide axis.
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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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |