Patent US3577181A successfully refreshed from Google Patents.
US3577181A
Expired / Lapsed
US
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Transistor package for microwave stripline circuits
Assignee: RCA Corp
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Filing: 1969-02-13
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Granted: 1971-05-04
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Expires: 1989-02-13
Abstract
Abstract Package for mounting a transistor in a microwave stripline circuit comprising a metal base member, means disposed on the base member for grounding the emitter or base electrode of the transistor, and segments of low impedance microwave transmission lines disposed adjacent the grounding means, one of these including a ceramic core having both good dielectric and good heat conducting properties and being adapted to support the transistor and connect it to an RF output circuit. The other segment is adapted to electrically connect the transistor to an RF input circuit.
Inventors
- 👤 Erwin F Belohoubek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:48
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/085; H03; H03F; H03F3/00; H03F3/60; H10; H10W; H10W72/00; H10W72/30; H10W44/00; H10W44/20; H10W72/071; H10W72/073; H10W72/07331; H10W72/07336; H10W72/075; H10W72/07551; H10W72/07554; H10W72/50; H10W72/541; H10W72/5445; H10W72/547
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
A mounted transistor device in a microstripline circuit comprising; a metal base member, a metal block on said base member for grounding the emitter or base electrode of said transistor and a ground connection from one of said emitter or base electrodes to said block, a first segment of low impedance microwave transmission line mounted on said base member on one side of said metal block, said line comprising a ceramic core member having both good dielectric and good heat conducting properties and electrically conducting films on opposed surfaces of said core member, a transistor mounted on said segment with its collector electrode soldered to one of said conducting films, and a second segment of low impedance microwave transmission line comprising a ceramic core member with electrically conducting films on opposed surfaces thereof disposed between and connected to an RF input circuit and to the emitter and base electrodes of said transistor.
Claim 2
Dependent Claim
152 words
A mounted transistor device in a microstripline circuit comprising; a metal base member, a metal block on said base member for grounding the emitter or base electrode of said transistor and a ground connection from one of said emitter or base electrodes to said block, a first segment of low impedance microwave transmission line mounted on said base member on one side of said metal block, said line comprising a ceramic core member having both good dielectric and good heat conducting properties and electrically conducting films on opposed surfaces of said core member, a transistor mounted on said segment with its collector electrode soldered to one of said conducting films, and a second segment of low impedance microwave transmission line comprising a ceramic core member with electrically conducting films on opposed surfaces thereof disposed between and connected to an RF input circuit and to the emitter and base electrodes of said transistor.
Claim 3
Independent Claim
169 words
A device for mounting a transistor in a microstripline circuit comprising: a metal base member, grounding means on said base member for grounding the emitter or base electrode of said transistor, a first segment of low impedance microwave transmission line comprising a strip of ceramic material having electrically conducting films on opposed surfaces thereof, mounted on said base member on one side of said grounding means, said first segment being adapted to be electrically connected to an RF input circuit, means including said grounding means functioning as a transmission line for electrically connecting said first line segment to the emitter and base electrodes of said transistor, and a second segment of low impedance microwave transmission line for supporting said transistor, comprising a strip of ceramic material having both good dielectric and good heat conducting properties and having electrically conducting films on opposed surfaces thereof, mounted on said base member on the opposite side of said grounding means, and being adapted to be electrically connected to an RF output circuit.
Claim 4
Independent Claim
169 words
A device for mounting a transistor in a microstripline circuit comprising: a metal base member, grounding means on said base member for grounding the emitter or base electrode of said transistor, a first segment of low impedance microwave transmission line comprising a strip of ceramic material having electrically conducting films on opposed surfaces thereof, mounted on said base member on one side of said grounding means, said first segment being adapted to be electrically connected to an RF input circuit, means including said grounding means functioning as a transmission line for electrically connecting said first line segment to the emitter and base electrodes of said transistor, and a second segment of low impedance microwave transmission line for supporting said transistor, comprising a strip of ceramic material having both good dielectric and good heat conducting properties and having electrically conducting films on opposed surfaces thereof, mounted on said base member on the opposite side of said grounding means, and being adapted to be electrically connected to an RF output circuit.
Claim 5
Dependent Claim
170 words
A mounted transistor device in a microstripline circuit comprising: a metal base member, a first segment of low impedance microwave transmission line mounted on said base member, said line segment comprising a ceramic core member having both good dielectric and good heat conducting properties and metal films on opposing surfaces of said core member, said segment being adapted to be connected to an RF output circuit, a transistor mounted on one of said metal films with its collector electrode soldered thereto, a metal block on said base member adjacent said first line segment for grounding the emitter or base electrode of said transistor and an electrical connection from either said emitter or base electrode to said block, a second segment of low impedance microwave transmission line comprising a ceramic core member with metal films on opposing surfaces thereof mounted upon said metal block and adapted to be electrically connected to an RF input circuit, and means connecting said second line segment to the emitter and base electrodes of said transistor.
Claim 6
Dependent Claim
170 words
A mounted transistor device in a microstripline circuit comprising: a metal base member, a first segment of low impedance microwave transmission line mounted on said base member, said line segment comprising a ceramic core member having both good dielectric and good heat conducting properties and metal films on opposing surfaces of said core member, said segment being adapted to be connected to an RF output circuit, a transistor mounted on one of said metal films with its collector electrode soldered thereto, a metal block on said base member adjacent said first line segment for grounding the emitter or base electrode of said transistor and an electrical connection from either said emitter or base electrode to said block, a second segment of low impedance microwave transmission line comprising a ceramic core member with metal films on opposing surfaces thereof mounted upon said metal block and adapted to be electrically connected to an RF input circuit, and means connecting said second line segment to the emitter and base electrodes of said transistor.
References Cited (Backward Citations)
US3428911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |