US4476446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impedance matching network for field effect transistor
Assignee: Raytheon Co
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Filing: 1983-08-12
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Granted: 1984-10-09
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Expires: 2003-08-12
Abstract
Abstract An impedance matching network for coupling a microwave transmission line to a field effect transistor (FET). The impedance matching network includes a resistor coupled in shunt with the FET and an inductor connected between the microwave transmission line and the resistor. The inductor is formed by wrapping a conductive wire around a post inserted into a hole formed in a support for the FET.
Inventors
- 👤 Ronald E. Blight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:27
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/02; H01P1/00; H01P1/20; H01P1/201; H01P1/203
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
An impedance matching network comprising: a support having an alignment opening therein; a field effect transistor disposed on a surface of the support; a resistor disposed on said surface of the support and coupled in shunt with a pair of electrodes in the field effect transistor; a microwave transmission line; and an inductor comprising a length of a wire coiled about a region, the coiled portion of the wire aligned over the alignment opening, and having a pair of ends disposed over the surface, a first end electrically coupled to a first one of the electrodes of the pair of electrodes of the field effect transistor and having a second end electrically coupled to the microwave transmission line.
Claim 2
Dependent Claim
118 words
An impedance matching network comprising: a support having an alignment opening therein; a field effect transistor disposed on a surface of the support; a resistor disposed on said surface of the support and coupled in shunt with a pair of electrodes in the field effect transistor; a microwave transmission line; and an inductor comprising a length of a wire coiled about a region, the coiled portion of the wire aligned over the alignment opening, and having a pair of ends disposed over the surface, a first end electrically coupled to a first one of the electrodes of the pair of electrodes of the field effect transistor and having a second end electrically coupled to the microwave transmission line.
Claim 3
Dependent Claim
23 words
The network as recited in claim 1 wherein said coiled portion is freely suspended over the alignment opening and has an air core.
Claim 4
Dependent Claim
27 words
The network as recited in claim 1 further comprising a low dielectric member disposed through the coiled portion of the wire and the opening in the support.
Claim 5
Dependent Claim
160 words
A microwave circuit comprising: a base having a conductive layer disposed on a first surface thereof; a microwave transmission line including a strip conductor portion dielectrically spaced from a ground plane conductor portion, said ground plane conductor portion of the microwave transmission line being connected to said conductive layer of said base; a support disposed on the base having an alignment opening; a plurality of electrically interconnected microwave components disposed on a surface of said support, said components including a field effect transistor and a resistor, said resistor having a first end connected to a gate electrode of the field effect transistor and a second end coupled to a reference potential; and an inductor comprising a length of wire coiled about a region, said coiled portion of the wire aligned over the alignment opening and having a first end electrically coupled to said gate electrode and a second end electrically coupled to the strip conductor of the microwave transmission line.
Claim 6
Dependent Claim
160 words
A microwave circuit comprising: a base having a conductive layer disposed on a first surface thereof; a microwave transmission line including a strip conductor portion dielectrically spaced from a ground plane conductor portion, said ground plane conductor portion of the microwave transmission line being connected to said conductive layer of said base; a support disposed on the base having an alignment opening; a plurality of electrically interconnected microwave components disposed on a surface of said support, said components including a field effect transistor and a resistor, said resistor having a first end connected to a gate electrode of the field effect transistor and a second end coupled to a reference potential; and an inductor comprising a length of wire coiled about a region, said coiled portion of the wire aligned over the alignment opening and having a first end electrically coupled to said gate electrode and a second end electrically coupled to the strip conductor of the microwave transmission line.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |