US5017886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
RF power combiner using baluns
Assignee: Frontgrade Technologies Inc
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Filing: 1989-12-12
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Granted: 1991-05-21
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Expires: 2009-12-12
Abstract
Abstract An RF power combiner combines the power of several microwave high power FET amplifiers. A plurality of baluns which convert a balanced transmission line to an unbalanced transmission line and have outputs which are 180° out of phase from each other may be connected at the inputs and the outputs of the FETs. This connection allows for very high output power while matching impedances of the input and the output of the power combiner. Additionally, loss in the output circuit can be minimized by connecting equi-phase outputs of the FETs in a parallel/push-pull manner.
Inventors
- 👤 Bernard D. Geller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:32
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/60; H03F3/602; H03F1/00; H03F1/32; H03F1/3241; H03F1/3252
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
102 words
A power combiner for combining the power of several devices, comprising: distribution means for receiving a power combiner input signal and providing device input signals to each of said several devices, said distribution means comprising at least one balun receiving said power combiner input and providing first and second outputs and at least second and third baluns each receiving one of said first and second outputs, and means for providing said device input signals in response to outputs of said second and third baluns; and a single balun for receiving outputs from each of said devices and providing a combined output signal
Claim 2
Dependent Claim
102 words
A power combiner for combining the power of several devices, comprising: distribution means for receiving a power combiner input signal and providing device input signals to each of said several devices, said distribution means comprising at least one balun receiving said power combiner input and providing first and second outputs and at least second and third baluns each receiving one of said first and second outputs, and means for providing said device input signals in response to outputs of said second and third baluns; and a single balun for receiving outputs from each of said devices and providing a combined output signal
Claim 3
Dependent Claim
13 words
A power combiner as claimed in claim 1, wherein said devices are FETs.
Claim 4
Dependent Claim
17 words
A power combiner as claimed in claim 2, wherein said FETs are microwave high power FET amplifiers.
Claim 5
Dependent Claim
23 words
A power combiner as claimed in claim 1, wherein outputs of said devices which have equal phases are connected in a parallel/push-pull arrangement.
Claim 6
Dependent Claim
30 words
A power combiner as claimed in claim 4, wherein said connection of outputs of said devices having equal phases produce two anti-phase outputs which are combined using said single balun.
Claim 7
Dependent Claim
30 words
A power combiner as claimed in claim 1, wherein a number of said devices is four and a number of said baluns connected to inputs of said devices is three.
Claim 8
Dependent Claim
32 words
A power combiner as claimed in claim 1, wherein said distribution means comprises (n-1) baluns, where n is an integer greater than 1 and is equal to the number of said devices.
Claim 9
Dependent Claim
14 words
A power combiner as claimed in claim 7, wherein n is greater than 2.
Claim 10
Dependent Claim
17 words
A power combiner as claimed in claim 1, wherein said providing means comprises at least four baluns.
Claim 11
Dependent Claim
14 words
A power combiner as claimed in claim 1, wherein said devices are FET cells.
Claim 12
Dependent Claim
66 words
A power combiner for combining the power of n devices, where n is an integer greater than two, said power combiner comprising: distribution means for receiving a power combiner input signal and providing device input signals to each of said plural devices, said distribution means comprising (n-1) baluns; and a single balun for receiving outputs from each of said devices and providing a combined output signal.
Claim 13
Dependent Claim
66 words
A power combiner for combining the power of n devices, where n is an integer greater than two, said power combiner comprising: distribution means for receiving a power combiner input signal and providing device input signals to each of said plural devices, said distribution means comprising (n-1) baluns; and a single balun for receiving outputs from each of said devices and providing a combined output signal.
References Cited (Backward Citations)
US4097814A
Cited
US4305043A
Cited
US4291278A
Cited
US4386324A
Cited
US4588962A
Cited
US4466445A
Cited
US4549152A
Cited
US4619001A
Cited
US4647868A
Cited
US4647867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-20 | 1994-11-19 | 1995-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-20 | 1998-11-19 | 1999-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-20 | 2002-11-19 | 2003-05-21 | $7700.00 | Window Closed / Lapsed |