US6285273B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated balun transformer
Assignee: Murata Manufacturing Co Ltd
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Filing: 1997-03-12
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Granted: 2001-09-04
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Expires: 2017-03-12
Abstract
Abstract A laminated balun transformer includes a dielectric sheet for which a lead electrode is provided at its surface, dielectric sheets for which λ/4 striplines are provided at their surfaces respectively, and dielectric sheets for which ground electrodes are provided at their surfaces respectively. One pair of opposing striplines is provided with a dielectric sheet disposed therebetween so as to be electromagnetically coupled. The other pair of opposing striplines is provided with a dielectric sheet disposed therebetween so as to be electromagnetically coupled. An end of a stripline of one pair of striplines is electrically connected to an end of a stripline of the other pair of striplines through an external electrode.
Inventors
- 👤 Takehiko Morikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:40
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/041; H01F41/043; H01F17/00; H01F17/0006; H01F17/0013; H01F19/00; H01F19/04; H01P; H01P5/00; H01P5/08; H01P5/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
58 words
A laminated balun transformer comprising at least two pairs of striplines, the striplines of each pair being exclusively electromagnetically coupled to one another through a respective dielectric layer, the two pairs of striplines being in parallel planes with respect to one another, and with another dielectric layer having a grounded electrode thereon interposed between said pairs of striplines.
Claim 2
Dependent Claim
58 words
A laminated balun transformer comprising at least two pairs of striplines, the striplines of each pair being exclusively electromagnetically coupled to one another through a respective dielectric layer, the two pairs of striplines being in parallel planes with respect to one another, and with another dielectric layer having a grounded electrode thereon interposed between said pairs of striplines.
Claim 3
Dependent Claim
63 words
A laminated balun transformer according to claim 1 , further comprising an external grounded electrode connected to said grounded electrode interposed between said pairs of striplines, wherein said external grounded electrode is disposed on a surface of laminated balun transformer, and wherein one stripline from each of said two pairs of striplines is connected to said external grounded electrode via the grounded electrode.
Claim 4
Dependent Claim
124 words
A laminated balun transformer comprising: a first dielectric sheet with a first stripline located at one surface thereof; a second dielectric sheet with a second stripline exclusively electromagnetically coupled with said first stripline located at one surface thereof; a third dielectric sheet with a first grounded electrode located at one surface thereof: a fourth dielectric sheet with a third stripline located at one surface thereof; a fifth dielectric sheet with a fourth stripline exclusively electromagnetically coupled with said third stripline located at one surface thereof; and electrically connecting means for electrically connecting said first stripline and said fourth stripline, wherein said first, said second, said third, said fourth, and fifth dielectric sheets are in a stacked relationship one above another in a laminated structure.
Claim 5
Dependent Claim
124 words
A laminated balun transformer comprising: a first dielectric sheet with a first stripline located at one surface thereof; a second dielectric sheet with a second stripline exclusively electromagnetically coupled with said first stripline located at one surface thereof; a third dielectric sheet with a first grounded electrode located at one surface thereof: a fourth dielectric sheet with a third stripline located at one surface thereof; a fifth dielectric sheet with a fourth stripline exclusively electromagnetically coupled with said third stripline located at one surface thereof; and electrically connecting means for electrically connecting said first stripline and said fourth stripline, wherein said first, said second, said third, said fourth, and fifth dielectric sheets are in a stacked relationship one above another in a laminated structure.
Claim 6
Dependent Claim
70 words
A laminated balun transformer according to claim 3 , further comprising: a sixth dielectric sheet with a second ground electrode located at one surface thereof; and a seventh dielectric sheet with a third ground electrode located at one surface thereof, wherein said sixth, said first, said second, said third, said fourth, said fifth, and said seventh dielectric sheets are in a stacked relationship one above another in a laminated structure.
Claim 7
Dependent Claim
58 words
A laminated balun transformer according to claim 4 , further comprising an eighth dielectric sheet with a lead electrode located at one surface thereof, wherein said eighth, said sixth, said first, said second, said sixth, said third, said fourth, said fifth, and said seventh dielectric sheets are in a stacked relationship one above another in a laminated structure.
Claim 8
Dependent Claim
22 words
A laminated transformer in accordance with claim 3 , wherein said electrical connecting means includes via holes provided inside the laminated structure.
Claim 9
Dependent Claim
15 words
A laminated transformer in accordance with claim 3 , wherein said striplines are spiral shaped.
Claim 10
Dependent Claim
25 words
A laminated transformer in accordance with claim 3 , wherein said electrical connecting means includes external electrodes provided on side faces of the laminated structure.
Claim 11
Dependent Claim
59 words
A laminated balun transformer according to claim 3 , further comprising an external grounded electrode connected to said grounded electrode interposed between said second and third striplines, wherein said external grounded electrode is disposed on a surface of laminated balun transformer, and wherein said second and third striplines are connected to said external grounded electrode via the grounded electrode.
Claim 12
Dependent Claim
77 words
A laminated balun transformer used for a balanced-unbalanced circuit for taking out balanced signals from unbalanced signals or unbalanced signals from balanced signals, comprising at least two pairs of striplines, the striplines of each pair being exclusively electromagnetically coupled to one another through a respective dielectric layer, the two pairs of striplines being in parallel planes with respect to one another, and with another dielectric layer having a grounded electrode thereon interposed between said pairs of striplines.
Claim 13
Dependent Claim
77 words
A laminated balun transformer used for a balanced-unbalanced circuit for taking out balanced signals from unbalanced signals or unbalanced signals from balanced signals, comprising at least two pairs of striplines, the striplines of each pair being exclusively electromagnetically coupled to one another through a respective dielectric layer, the two pairs of striplines being in parallel planes with respect to one another, and with another dielectric layer having a grounded electrode thereon interposed between said pairs of striplines.
Claim 14
Dependent Claim
54 words
A laminated balun transformer according to claim 10 , wherein said grounded electrode includes a first, second and third grounded electrode, one pair of striplines is disposed between said first grounded electrode and said second ground electrode and the other pair of striplines is disposed between said first grounded electrode and the third electrode.
Claim 15
Dependent Claim
65 words
A laminated balun transformer according to claim 10 , further comprising an external grounded electrode connected to said grounded electrode interposed between said pairs of striplines, wherein said external grounded electrode is disposed on a surface of laminated balun transformer, and wherein one stripline from each of said at least two pairs of striplines is connected to said external grounded electrode via the ground electrode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-09-03 | 2005-03-05 | 2005-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-09-03 | 2009-03-05 | 2009-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-09-03 | 2013-03-05 | 2013-09-04 | $7700.00 | Window Closed / Lapsed |