US3721903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency mixer and modular replaceable element therefor
Assignee: SP-MICROWAVE Inc
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Filing: 1971-11-17
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Granted: 1973-03-20
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Expires: 1991-11-17
Abstract
Abstract A high frequency diode microwave frequency converter or mixer has its active mixer diode element mounted in a wave guide slot in a replaceable module also including an output intermediate frequency transmission line. The module is clamped into position in a module holder having a passage coupling to the module wave guide slot and at the same time furnishing walls for a high frequency rejection resonant cavity slot cooperating with the intermediate frequency transmission line.
Inventors
- 👤 W Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:27
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03D9/0616
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
138 words
High frequency signal converter means comprising: replaceable modular means having first and second substantially parallel major planar sides; said modular means having first and second leg means connected by first, second, and third spaced bridging means, said first and second spaced bridging means defining therebetween substantially rectangular wave guide slot means adapted to be coupled to external rectangular wave guide transmission line means, said second and third spaced bridging means defining therebetween substantially rectangular slot means adapted for cooperation with external closure means for forming high frequency resonant cavity means, intermediate frequency conductor means extending in insulated relation through said second and third bridging means and through said resonant cavity means, said conductor means having an end at said wave guide means, and high frequency diode means coupled at said conductor end to said wave guide slot means.
Claim 2
Dependent Claim
138 words
High frequency signal converter means comprising: replaceable modular means having first and second substantially parallel major planar sides; said modular means having first and second leg means connected by first, second, and third spaced bridging means, said first and second spaced bridging means defining therebetween substantially rectangular wave guide slot means adapted to be coupled to external rectangular wave guide transmission line means, said second and third spaced bridging means defining therebetween substantially rectangular slot means adapted for cooperation with external closure means for forming high frequency resonant cavity means, intermediate frequency conductor means extending in insulated relation through said second and third bridging means and through said resonant cavity means, said conductor means having an end at said wave guide means, and high frequency diode means coupled at said conductor end to said wave guide slot means.
Claim 3
Dependent Claim
39 words
Apparatus as described in claim 1 comprising: electrically insulating support means for supporting said conductor means within said third bridging means, said second and third bridging means forming spaced coaxial transmission line means in cooperation with said conductor means.
Claim 4
Dependent Claim
39 words
Apparatus as described in claim 1 wherein said diode means comprises: semiconductor means conductively supported at said conductor end, and spring point contact means conductively supported by said wave guide slot means in contacting relation with said semiconductor means.
Claim 5
Dependent Claim
62 words
APparatus as described in claim 1 wherein said closure means comprises: module holder means having a passage with first and second opposed walls for encompassing said replaceable modular means, said module holder means having high frequency transmission line means adapted to be coupled in impedance matched relation to said wave guide slot means at said first planar side of said modular means.
Claim 6
Dependent Claim
42 words
Apparatus as described in claim 4 wherein said closure means additionally comprises high frequency transmission line short circuiting means adapted to be coupled in impedance matched relation with said wave guide slot means at said second planar side of said modular means.
Claim 7
Dependent Claim
39 words
Apparatus as described in claim 5 wherein said first and second opposed walls of said passage are adapted to form closure walls of said cavity resonator slot at said respective first and second planar sides of said modular means.
Claim 8
Dependent Claim
41 words
Apparatus as described in claim 4 additionally comprising coaxial transmission line means adapted to be connected in conductive relation to said intermediate frequency conductor means for conduction of said intermediate frequency signals to utilization means external of said module holder means.
References Cited (Backward Citations)
US2945122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |