US5357212A
Expired / Lapsed
US
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Microwave amplifier
Assignee: Mitsubishi Electric Corp
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Filing: 1993-07-28
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Granted: 1994-10-18
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Expires: 2013-07-28
Abstract
Abstract A microwave amplifier includes input-side and output-side matching circuits disposed on the input side and output side of a microwave FET. Each of the matching circuits is a distributed constant circuit including microstrip lines disposed on a substrate of dielectric material. The input-side matching circuit includes a connecting section for connection to the FET. The connecting section comprises a first microstrip line having a first width equal to that of the input-side matching circuit, and a second microstrip line continuous and integral with the first microstrip line and having a second width smaller than the first width. The connecting section connects the input-side matching circuit to the input of the FET.
Inventors
- 👤 Masaki Kohno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:24
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/60; H03F3/601; H01; H01P; H01P5/00; H01P5/02; H01P5/022; H01P5/028; H03F1/00; H03F1/56; H10; H10W; H10W72/00; H10W72/50; H10W72/541; H10W72/5445
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
137 words
A microwave amplifier comprising: a microwave amplifying device having an input and an output; an input matching circuit connected to the input of said microwave amplifying device; and an output matching circuit connected to the output of said microwave amplifying device wherein each of said input and output matching circuits is a distributed constant circuit comprising microstrip lines disposed on a dielectric substrate and at least one of said input and output matching circuits includes a connecting section for connecting that matching circuit to said microwave amplifying device, said connecting section comprising a first microstrip line having a first width equal to that of the matching circuit to which said connecting section is connected and a second microstrip line continuous and integral with said first microstrip line and having a second width smaller than said first width.
Claim 2
Dependent Claim
137 words
A microwave amplifier comprising: a microwave amplifying device having an input and an output; an input matching circuit connected to the input of said microwave amplifying device; and an output matching circuit connected to the output of said microwave amplifying device wherein each of said input and output matching circuits is a distributed constant circuit comprising microstrip lines disposed on a dielectric substrate and at least one of said input and output matching circuits includes a connecting section for connecting that matching circuit to said microwave amplifying device, said connecting section comprising a first microstrip line having a first width equal to that of the matching circuit to which said connecting section is connected and a second microstrip line continuous and integral with said first microstrip line and having a second width smaller than said first width.
Claim 3
Dependent Claim
20 words
The microwave amplifier according to claim 1 wherein said matching circuit including said connecting section is said input matching circuit.
Claim 4
Dependent Claim
17 words
The microwave amplifier according to claim 2 wherein said microwave amplifying device has a capacitive input impedance.
Claim 5
Dependent Claim
27 words
The microwave amplifier according to claim 1 wherein said second microstrip line is located between said first microstrip line and said matching circuit including said connecting section.
Claim 6
Dependent Claim
20 words
The microwave amplifier according to claim 4 wherein said matching circuit including said connecting section is said input matching circuit.
Claim 7
Dependent Claim
17 words
The microwave amplifier according to claim 5 wherein said microwave amplifying device has a capacitive input impedance.
Claim 8
Dependent Claim
35 words
The microwave amplifier according to claim 1 including a plurality of metallic islands arranged on at least one side of said second microstrip line juxtaposed in a direction extending away from said second microstrip line.
Claim 9
Dependent Claim
21 words
The microwave amplifier according to claim 7 wherein said metallic islands are disposed on two sides of said second microstrip line.
Claim 10
Dependent Claim
19 words
The microwave amplifier according to claim 8 wherein said metallic islands are slightly shorter than said second microstrip line.
Claim 11
Dependent Claim
20 words
The microwave amplifier according to claim 8 wherein said matching circuit including said connecting section is said input matching circuit.
Claim 12
Dependent Claim
30 words
The microwave amplifier according to claim 8 wherein said matching circuit including said connecting section is said input matching circuit and said microwave amplifying device has a capacitive input impedance.
Claim 13
Dependent Claim
19 words
The microwave amplifier according to claim 7 wherein said metallic islands are slightly shorter than said second microstrip line.
Claim 14
Dependent Claim
20 words
The microwave amplifier according to claim 7 wherein said matching circuit including said connecting section is said input matching circuit.
Claim 15
Dependent Claim
30 words
The microwave amplifier according to claim 7 wherein said matching circuit including said connecting section is said input matching circuit and said microwave amplifying device has a capacitive input impedance.
Claim 16
Dependent Claim
22 words
The microwave amplifier according to claim 1 wherein each of said first and second microstrip lines comprises at least two microstrip lines.
Claim 17
Dependent Claim
24 words
The microwave amplifier according to claim 15 wherein said at least two first microstrip lines alternate with said at least two second microstrip lines.
Claim 18
Dependent Claim
17 words
The microwave amplifier according to claim 16 wherein each of said microstrip lines has a different length.
Claim 19
Dependent Claim
20 words
The microwave amplifier according to claim 17 wherein said matching circuit including said connecting section is said input matching circuit.
Claim 20
Dependent Claim
30 words
The microwave amplifier according to claim 17 wherein said matching circuit including said connecting section is said input matching circuit and said microwave amplifying device has a capacitive input impedance.
Claim 21
Dependent Claim
20 words
The microwave amplifier according to claim 16 wherein said matching circuit including said connecting section is said input matching circuit.
Claim 22
Dependent Claim
30 words
The microwave amplifier according to claim 16 wherein said matching circuit including said connecting section is said input matching circuit and said microwave amplifying device has a capacitive input impedance.
Claim 23
Dependent Claim
20 words
The microwave amplifier according to claim 15 wherein said matching circuit including said connecting section is said input matching circuit.
Claim 24
Dependent Claim
30 words
The microwave amplifier according to claim 15 wherein said matching circuit including said connecting section is said input matching circuit and said microwave amplifying device has a capacitive input impedance.
References Cited (Backward Citations)
JPS54101648A
Cited
JPS6449401A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
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