US3568190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Full monopulse variable polarization feed bridge
Assignee: Boeing North American Inc
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Filing: 1968-07-26
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Granted: 1971-03-02
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Expires: 1988-07-26
Abstract
Abstract The device of this invention is a monopulse microwave feed bridge for transmitting and receiving selected polarizations which is comprised of an ortholinear, full monopulse feed bridge having a pair of mutually orthogonal linear polarization monopulse sum ports and a set of dual-plane monopulse difference ports comprised of a first and second pair of mutually orthogonal linear polarization receiver ports. The phase at one port of each of the three pairs of ports is adjustable and a 3db hybrid coupler is interposed at each pair of ports. A waveguide switch cooperates with the summation channel 3db hybrid coupler and the variable phase shifter to selectively control and vary the polarization of the transmitted waves. The 3db hybrid couplers at the monopulse difference channel outputs and the adjustable monopulse difference channel phase shifters provide difference channel receiver responses to selected polarizations in a multimode system application. This particular configuration allows the selection of any particular type of transmitted polarized wave while simultaneously providing the capacity to selectively receive the transmitted polarization and its orthogonal polarizations. In a second embodiment of the invention, the 3db hybrid couplers are replaced by 3db hybrid switches to provide a linear polarization mode on transmit and receive.
Inventors
- 👤 Sam H Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:30
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/44; G01S13/4409; H; H01; H01P; H01P5/00; H01P5/12; H01P5/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
156 words
A dual-plane monopulse feed bridge for receiving and transmitting selected polarizations comprising in combination: a. a pair of linear polarization monopulse sum ports, the linear polarizations of which being mutually orthogonal; b. a first pair of linear polarization monopulse difference receiving ports, the linear polarizations being mutually orthogonal in the same manner as said sum ports, said difference ports being operative in a common first responsive plane of said dual plane bridge; c. a second pair of linear polarization monopulse difference receiving ports, the linear polarizations of which being mutually orthogonal in the same manner as said sum ports, said second pair of difference ports being operative in a common second responsive plane of said dual-plane bridge, said second plane being orthogonal to said first plane; and d. variable phase shift means inserted in circuit with one port of each of said pairs of ports for controllably varying the phase of the transmitted and received signals.
Claim 2
Dependent Claim
156 words
A dual-plane monopulse feed bridge for receiving and transmitting selected polarizations comprising in combination: a. a pair of linear polarization monopulse sum ports, the linear polarizations of which being mutually orthogonal; b. a first pair of linear polarization monopulse difference receiving ports, the linear polarizations being mutually orthogonal in the same manner as said sum ports, said difference ports being operative in a common first responsive plane of said dual plane bridge; c. a second pair of linear polarization monopulse difference receiving ports, the linear polarizations of which being mutually orthogonal in the same manner as said sum ports, said second pair of difference ports being operative in a common second responsive plane of said dual-plane bridge, said second plane being orthogonal to said first plane; and d. variable phase shift means inserted in circuit with one port of each of said pairs of ports for controllably varying the phase of the transmitted and received signals.
Claim 3
Dependent Claim
32 words
The invention according to claim 1 and further comprising a coupler means for coupling each port to the other port of a pair and for dividing a portion of the energy therebetween.
Claim 4
Dependent Claim
33 words
The invention according to claim 1 and further comprising a switch means for controllably coupling each port to the other port of a pair and for dividing a portion of the energy therebetween.
Claim 5
Dependent Claim
43 words
The device of claim 1 in which there is further provided first, second and third signal combining means, each responsive to a first and phase-shifted second output of a respective pair of said port pairs for providing monopulse outputs of selected polarization condition.
Claim 6
Dependent Claim
15 words
The invention according to claim 4 wherein said signal combining means are 3db, hybrid couplers.
Claim 7
Dependent Claim
15 words
The invention according to claim 4 wherein said signal combining means are 3db, hybrid switches.
Claim 8
Dependent Claim
70 words
The invention according to claim 4 and further comprising: a. a pair of circulator means connected one to each of said pair of mutually orthogonal sum ports; b. a source of microwave energy; c. a waveguide switch controllably connecting said source of microwave energy to said mutually orthogonal sum ports; and d. receiver means connected to said circulator means for controlled connection to said pair of mutually orthogonal sum ports.
Claim 9
Dependent Claim
123 words
A dual-plane monopulse feed bridge for receiving and transmitting selected polarizations comprising in combination: a. an array of at least four orthomode transducers, each of said transducers comprised of a square waveguide section and two rectangular waveguide sections, said rectangular waveguide sections connected in circuit to said square waveguide section with said rectangular waveguide sections orthogonal to each other; b. dual-plane monopulse means responsive to said orthomode Transducers for providing a first and second dual-plane monopulse output set of mutually orthogonal linear polarization; c. means responsive to said monopulse means for combining like monopulse signals of said mutually orthogonal linearly polarized output sets; and d. means for variably shifting the phase of each monopulse output of one of said dual-plane monopulse output sets.
Claim 10
Dependent Claim
123 words
A dual-plane monopulse feed bridge for receiving and transmitting selected polarizations comprising in combination: a. an array of at least four orthomode transducers, each of said transducers comprised of a square waveguide section and two rectangular waveguide sections, said rectangular waveguide sections connected in circuit to said square waveguide section with said rectangular waveguide sections orthogonal to each other; b. dual-plane monopulse means responsive to said orthomode Transducers for providing a first and second dual-plane monopulse output set of mutually orthogonal linear polarization; c. means responsive to said monopulse means for combining like monopulse signals of said mutually orthogonal linearly polarized output sets; and d. means for variably shifting the phase of each monopulse output of one of said dual-plane monopulse output sets.
References Cited (Backward Citations)
US3274604A
Cited
US3093826A
Cited
US3308468A
Cited
US3293648A
Cited
US3209355A
Cited
US3259899A
Cited
US3453617A
Cited
US3344424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |