Patent US6441696B1 successfully refreshed from Google Patents.
US6441696B1
Expired / Lapsed
US
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Balun
Assignee: MACOM Technology Solutions Holdings Inc
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Filing: 2000-07-07
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Granted: 2002-08-27
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Expires: 2020-07-07
Abstract
Abstract The present invention relates to a balun circuit that includes means for transforming a balanced input signal to an unbalanced signal and impedance changing means. The means for transforming the balun input signal to an unbalanced output signal is a λ/2-waveguide ( 30 ). A first side of the λ/2-waveguide ( 30 ) is connected to a second port (P 2 ) of the balun circuit, while a second side of said λ/2-waveguide ( 30 ) is connected to a third port (P 3 ) of the balun circuit. The impedance changing means is a λ/4-waveguide ( 40 ) of which a first side is connected to a second side of the λ/2-waveguide ( 30 ) and a second side is connected to the first port (P 1 ) of the balun circuit.
Inventors
- 👤 David Westberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:15
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01P5/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
173 words
A balun circuit comprising: a λ/2 waveguide, a first end of said λ/2 waveguide being connected to a first port of the balun circuit via a first coil, a second end of the said λ/2 waveguide being connected to a second port of the balun circuit via a second coil; a first λ/4 waveguide, a first end of the first λ/4 waveguide being connected to said second end of the λ/2 waveguide, a second end of the first λ/4 waveguide being connected to a third port of the balun circuit via a first capacitor; and biasing means for biasing components in a load connected between said first and second ports of the balun circuit, the biasing means comprising: a second λ/4 waveguide, a first end of the second λ/4 waveguide being connected to said first end of the λ/2 waveguide, a second end of the second λ/4 waveguide being connected to a voltage source and to one electrode of a second capacitor, the other electrode of the second capacitor being connected to ground.
Claim 2
Dependent Claim
173 words
A balun circuit comprising: a λ/2 waveguide, a first end of said λ/2 waveguide being connected to a first port of the balun circuit via a first coil, a second end of the said λ/2 waveguide being connected to a second port of the balun circuit via a second coil; a first λ/4 waveguide, a first end of the first λ/4 waveguide being connected to said second end of the λ/2 waveguide, a second end of the first λ/4 waveguide being connected to a third port of the balun circuit via a first capacitor; and biasing means for biasing components in a load connected between said first and second ports of the balun circuit, the biasing means comprising: a second λ/4 waveguide, a first end of the second λ/4 waveguide being connected to said first end of the λ/2 waveguide, a second end of the second λ/4 waveguide being connected to a voltage source and to one electrode of a second capacitor, the other electrode of the second capacitor being connected to ground.
Claim 3
Dependent Claim
20 words
The balun circuit according to claim 1 , wherein at least one of said first and second coils is trimable.
Claim 4
Dependent Claim
17 words
The balun circuit according to claim 1 , wherein the balun circuit is implemented in stirpline form.
Claim 5
Dependent Claim
17 words
The balun circuit according to claim 1 , wherein the balun circuit is implemented in microstrip form.
Claim 6
Dependent Claim
28 words
The balun circuit according to claim 1 , wherein said first and second coils and said first and second capacitors are disposed on one and the same substrate.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-08-26 | 2006-02-25 | 2006-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-08-26 | 2010-02-25 | 2010-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-08-26 | 2014-02-25 | 2014-08-27 | $7700.00 | Window Closed / Lapsed |