US3584306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency converter
Assignee: Stellex Microwave Systems Inc
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Filing: 1967-09-18
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Granted: 1971-06-08
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Expires: 1987-09-18
Abstract
Abstract This invention relates to a balanced high frequency converter for mixing of microwave signals over large bandwidth. The essential characteristics of this invention are the placement of semiconductor diodes at the intersection of a waveguide with two coaxial lines in such manner that the broad walls of the waveguide are utilized as the continuation of the outer conductors of the coaxial lines. Thus the waveguide does not cause an impedance mismatch for input signals propagating on the two coaxial lines, allowing coupling of input signals at any frequencies to the diodes. The resulting beat frequency signal, generated in the semiconductor diodes, is extracted through the waveguide.
Inventors
- 👤 George Ctirad Spacek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:40
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03D9/0625
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
188 words
A microwave frequency converter comprising: a rectangular waveguide through which a first radiofrequency wave may be propagated, said waveguide having first and second opposite pairs of walls with said first pair of walls being narrower than said second pair of walls; first and second coaxial transmission lines, each said line having an inner and an outer conductor; said outer transmission line conductors mounted upon and extending outwardly from said opposite first pair of walls of said waveguide; a conducting member, said member extending through the interior of said waveguide and joining said inner conductors of said transmission lines through apertures in said first walls of said waveguide; a pair of semiconductor diodes mounted on opposite sides of said member and electrically coupled between said opposite sides of said member and respective ones of said second pair of waveguide walls; means applying a second radiofrequency wave to said first transmission line, said first transmission line transmitting said second signal to said member; and a further wave conducting means coupled to said second transmission line, said second transmission line coupling signals between said member and said further wave conducting means.
Claim 2
Dependent Claim
188 words
A microwave frequency converter comprising: a rectangular waveguide through which a first radiofrequency wave may be propagated, said waveguide having first and second opposite pairs of walls with said first pair of walls being narrower than said second pair of walls; first and second coaxial transmission lines, each said line having an inner and an outer conductor; said outer transmission line conductors mounted upon and extending outwardly from said opposite first pair of walls of said waveguide; a conducting member, said member extending through the interior of said waveguide and joining said inner conductors of said transmission lines through apertures in said first walls of said waveguide; a pair of semiconductor diodes mounted on opposite sides of said member and electrically coupled between said opposite sides of said member and respective ones of said second pair of waveguide walls; means applying a second radiofrequency wave to said first transmission line, said first transmission line transmitting said second signal to said member; and a further wave conducting means coupled to said second transmission line, said second transmission line coupling signals between said member and said further wave conducting means.
Claim 3
Dependent Claim
36 words
A frequency converter as in claim 1 wherein said conducting member is in the form of a flat plate so that said conducting member and said second pair of waveguide walls form a strip transmission line.
Claim 4
Dependent Claim
42 words
A frequency converter as in claim 1 wherein said conducting member is cylindrical and said diodes are connected at diametrically opposed points on said conducting memBer so that said member and said second pair of waveguide walls form a slab transmission line.
Claim 5
Dependent Claim
38 words
A frequency converter as set forth in claim 1 wherein said semiconductor diodes are parallel with said first pair of waveguide walls and said conducting member provides an electrical short between one terminal of each of said diodes.
References Cited (Backward Citations)
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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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |