Patent US4955892A successfully refreshed from Google Patents.
Patent US3633110A successfully refreshed from Google Patents.
US3633110A
Expired / Lapsed
US
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Waveguide mixer
Assignee: National Aeronautics and Space Administration
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Filing: 1970-06-26
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Granted: 1972-01-04
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Expires: 1990-06-26
Abstract
Abstract A microwave mixer comprised of crossed waveguides and a crystal mixer. One of the waveguides has input horns at each end which are axially adjustable with respect to the ends of the waveguide. Axial adjustment of a horn with respect to the end of a waveguide varies the width of the gap between the horn and the waveguide to tune the signal input from the horn to the mixer. Accordingly, the mixer may be tuned by adjusting the position of the input horns with respect to the input ports of the mixer.
Inventors
- 👤 Thomas E Sullivan
- 👤 Lothar Frenkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:48
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03D9/0616
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
78 words
A crossed waveguide device comprising: a first waveguide having first and second ends; a second waveguide crossed over and contacting the first waveguide and having an interconnecting transfer aperture extending transversely through the contacting walls of the waveguides at the crossing; a first signal horn aligned with first end of the first waveguide; and first means connected between the first input horn and the first waveguide for translating the input horn toward and away from the first end.
Claim 2
Dependent Claim
78 words
A crossed waveguide device comprising: a first waveguide having first and second ends; a second waveguide crossed over and contacting the first waveguide and having an interconnecting transfer aperture extending transversely through the contacting walls of the waveguides at the crossing; a first signal horn aligned with first end of the first waveguide; and first means connected between the first input horn and the first waveguide for translating the input horn toward and away from the first end.
Claim 3
Dependent Claim
47 words
The waveguide device of claim 1 including: a second signal input horn aligned with the second end of the first waveguide; and second means connected between the second input horn and the first waveguide for translating the second input horn toward and away from the second end.
Claim 4
Dependent Claim
69 words
The crossed waveguide device of claim 1 wherein: the first and second waveguides include apertures in the walls opposite the contacting walls, the apertures being aligned with the interconnecting transfer aperture whereby a through passageway is formed at the crossing of the first and second waveguides; and a crystal mixer composed of a crystal and conductive whisker are mounted in the through passageway in noncontacting relationship with the waveguides.
Claim 5
Dependent Claim
46 words
The crossed waveguide device of claim 3 wherein: one side of the crystal is electrically connected to the waveguides and the whisker contacts the opposite side of the crystal and extends in the passageway through both of the waveguides in electrically insulated relationship with the waveguides.
Claim 6
Dependent Claim
73 words
The crossed waveguide device of claim 1 wherein: a housing is provided for the crossed waveguides, the crossed waveguides being mounted within the housing; the first signal horn, the housing, and the first end of the first waveguide define a tuning cavity between the horn and the waveguide; and the first means is an adjusting means connected between the first input horn and the housing for adjusTing the size of the tuning cavity.
Claim 7
Dependent Claim
73 words
The crossed waveguide device of claim 5 wherein: the adjusting means includes a flexible leaf spring connected to the housing at one portion of the spring and an adjusting screw extending between another portion of the leaf spring and the housing for adjusting the position of the spring with respect to the housing; and the first signal input horn is supported adjacent the first end of the first waveguide by the leaf spring.
Claim 8
Dependent Claim
40 words
The crossed waveguide device of claim 6 wherein: the leaf spring of the adjusting means has a first adjusting position in which the first signal input horn is supported in abutting relationship with the first end of the first waveguide.
Claim 9
Dependent Claim
39 words
The crossed waveguide device of claim 7 wherein: the leaf spring of the adjusting means has a second adjusting position in which the first signal input horn is displaced incrementally away from the first end of the first waveguide.
Claim 10
Dependent Claim
112 words
The crossed waveguide device of claim 2 wherein: a housing is provided for the crossed waveguides, the crossed waveguides being mounted within the housing; the housing and the first and second signal horns define tuning cavities at the respective ends of the first waveguide; the first means is first adjusting means connected between the housing and the first signal horn for adjusting the tuning cavity at the first end of the first waveguide; and the second means is a second adjusting means connected between the housing and the second signal horn for adjusting the tuning cavity at the second end of the first waveguide independently of the cavity at the first end.
Claim 11
Dependent Claim
70 words
The crossed waveguide device of claim 9 wherein: the first adjusting means has an adjustable screw connection with the housing for incrementally adjusting the tuning cavity between the first horn and the first end of the first waveguide; and the second adjusting means also has an adjustable screw connection with the housing for incrementally adjusting the tuning cavity between the second horn and the second end of the first waveguide.
Claim 12
Dependent Claim
35 words
The crossed waveguide device of claim 9 wherein: a flange connection is joined to the second waveguide at one end; and an adjustable shorting stub is mounted in the second waveguide at the other end.
Claim 13
Dependent Claim
22 words
The crossed waveguide device of claim 9 wherein: the first and second crossed waveguides are formed by a single metallic cruciform element.
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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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |