US6914512B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-line balun transformer
Assignee: Samsung Electro Mechanics Co Ltd
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Filing: 2003-06-16
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Granted: 2005-07-05
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Expires: 2023-06-16
Abstract
Abstract A 3-line balun transformer includes an unbalanced port for an unbalanced signal, first and second balanced ports for balanced signals, the balanced signals being the same in level and 180 degrees out of phase with each other, a first line having its first end connected to the unbalanced port and its second end connected to ground, a second line arranged in parallel with the first line while being spaced apart from the first line, the second line having its first end and its second end connected to the first balanced port, and a third line arranged in parallel with the second line while being spaced apart from the second, the third line having its first end connected to the first end of the second line and its second end connected to the second balanced port.
Inventors
- 👤 Dong Seok Park
- 👤 Nam Chul Kim
- 👤 Jeong Ho Yoon
- 👤 Byoung HWA Lee
- 👤 Sang Soo Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:04
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01P5/10
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
158 words
A 3-line balun transformer comprising: an unbalanced port for inputting or outputting an unbalanced signal; first and second balanced ports for outputting or inputting balanced signals, respectively, said balanced signals being the same in level and 180 degrees out of phase with each other; a first line having a first end connected to said unbalanced port and a second end connected to ground; a second line arranged in parallel with said first line while being spaced apart from said first line by a predetermined distance, said second line having a first end and a second end, the second end of second line being connected to said first balanced port; and a third line arranged in parallel with said second line while being spaced apart from said second line by a predetermined distance, said third line having a first end connected to said first end of said second line and a second end connected to said second balanced port.
Claim 2
Dependent Claim
158 words
A 3-line balun transformer comprising: an unbalanced port for inputting or outputting an unbalanced signal; first and second balanced ports for outputting or inputting balanced signals, respectively, said balanced signals being the same in level and 180 degrees out of phase with each other; a first line having a first end connected to said unbalanced port and a second end connected to ground; a second line arranged in parallel with said first line while being spaced apart from said first line by a predetermined distance, said second line having a first end and a second end, the second end of second line being connected to said first balanced port; and a third line arranged in parallel with said second line while being spaced apart from said second line by a predetermined distance, said third line having a first end connected to said first end of said second line and a second end connected to said second balanced port.
Claim 3
Dependent Claim
36 words
The 3-line balun transformer as set forth in claim 1 , wherein said first, second and third lines each have a length of λ/4 (λ is a wavelength at a center frequency of an input/output signal).
Claim 4
Dependent Claim
92 words
The 3-line balun transformer as set forth in claim 1 , wherein said transformer satisfies an impedance condition expressed by the following equation: 1 Z 13 - 1 Z 12 = 1 Z 22 - 1 Z 33 = ± 2 Z 0 u Z 0 b where, z mn (m,n=1,2,3) is a characteristic impedance between an mth line and an nth line, Z 0u is a termination impedance of said unbalanced port, and Z 0b is a termination impedance of each of said first and second balanced ports.
Claim 5
Dependent Claim
26 words
The 3-line balun transformer as set forth in claim 3 , wherein a characteristic impedance Z 11 between said first line and said ground is infinite.
Claim 6
Dependent Claim
27 words
The 3-line balun transformer as set forth in claim 3 , wherein a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 7
Dependent Claim
42 words
The 3-line balun transformer as set forth in claim 3 , wherein a characteristic impedance Z 11 between said first line and said ground is infinite and a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 8
Dependent Claim
27 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 12 between said first line and said second line is infinite.
Claim 9
Dependent Claim
42 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 12 between said first line and said second line is infinite and a characteristic impedance Z 11 between said first line and said ground is infinite.
Claim 10
Dependent Claim
43 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 12 between said first line and said second line is infinite and a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 11
Dependent Claim
57 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 12 between said first line and said second line is infinite, a characteristic impedance Z 11 between said first line and said ground is infinite, and a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 12
Dependent Claim
27 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 13 between said first line and said third line is infinite.
Claim 13
Dependent Claim
42 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 13 between said first line and said third line is infinite and a characteristic impedance Z 11 between said first line and said ground is infinite.
Claim 14
Dependent Claim
43 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 13 between said first line and said third line is infinite and a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 15
Dependent Claim
57 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 13 between said first line and said third line is infinite, a characteristic impedance Z 11 between said first line and said ground is infinite, and a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 16
Dependent Claim
26 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 22 between said second line and said ground is infinite.
Claim 17
Dependent Claim
41 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 22 between said second line and said ground is infinite and a characteristic impedance Z 11 between said first line and said ground is infinite.
Claim 18
Dependent Claim
42 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 22 between said second line and said ground is infinite and a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 19
Dependent Claim
56 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 22 between said second line and said ground is infinite, a characteristic impedance Z 11 between said first line and said ground is infinite, and a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 20
Dependent Claim
26 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 33 between said third line and said ground is infinite.
Claim 21
Dependent Claim
41 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 33 between said third line and said ground is infinite and a characteristic impedance Z 11 between said first line and said ground is infinite.
Claim 22
Dependent Claim
42 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 33 between said third line and said ground is infinite and a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 23
Dependent Claim
56 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 33 between said third line and said ground is infinite, a characteristic impedance Z 11 between said first line and said ground is infinite, and a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 24
Dependent Claim
42 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 12 between said first line and said second line is infinite and the characteristic impedance Z 33 between said third line and said ground is infinite.
Claim 25
Dependent Claim
56 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 12 between said first line and said second line is infinite, the characteristic impedance Z 33 between said third line and said ground is infinite, and a characteristic impedance Z 11 between said first line and said ground is infinite.
Claim 26
Dependent Claim
57 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 12 between said first line and said second line is infinite, the characteristic impedance Z 33 between said third line and said ground is infinite, and a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 27
Dependent Claim
71 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 12 between said first line and said second line is infinite, the characteristic impedance Z 33 between said third line and said ground is infinite, a characteristic impedance Z 11 between said first line and said ground is infinite, and a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 28
Dependent Claim
42 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 13 between said first line and said third line is infinite and the characteristic impedance Z 22 between said second line and said ground is infinite.
Claim 29
Dependent Claim
56 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 13 between said first line and said third line is infinite, the characteristic impedance Z 22 between said second line and said ground is infinite, and a characteristic impedance Z 11 between said first line and said ground is infinite.
Claim 30
Dependent Claim
57 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 13 between said first line and said third line is infinite, the characteristic impedance Z 22 between said second line and said ground is infinite, and a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 31
Dependent Claim
71 words
The 3-line balun transformer as set forth in claim 3 , wherein the characteristic impedance Z 13 between said first line and said third line is infinite, the characteristic impedance Z 22 between said second line and said ground is infinite, a characteristic impedance Z 11 between said first line and said ground is infinite, and a characteristic impedance Z 23 between said second line and said third line is infinite.
Claim 32
Dependent Claim
45 words
The 3-line balun transformer as set forth in claim 3 , wherein a bandwidth characteristic is adjusted by varying a characteristic impedance Z 11 between said first line and said ground or a characteristic impedance Z 23 between said second line and said third line.
Claim 33
Dependent Claim
131 words
A 3-line balun transformer comprising: an unbalanced port for inputting or outputting an unbalanced signal; first and second balanced ports for outputting or inputting balanced signals, respectively, said balanced signals being the same in level and 180 degrees out of phase with each other; and first, second and third lines arranged in such a manner that they are mutually electromagnetically coupled; said first line having a first end connected to said unbalanced port and a second end connected to ground; said second line having a first end and a second end, the second end of said second line being connected to said first balanced port; said third line having a first end connected to said first end of said second line and a second end connected to said second balanced port.
Claim 34
Dependent Claim
131 words
A 3-line balun transformer comprising: an unbalanced port for inputting or outputting an unbalanced signal; first and second balanced ports for outputting or inputting balanced signals, respectively, said balanced signals being the same in level and 180 degrees out of phase with each other; and first, second and third lines arranged in such a manner that they are mutually electromagnetically coupled; said first line having a first end connected to said unbalanced port and a second end connected to ground; said second line having a first end and a second end, the second end of said second line being connected to said first balanced port; said third line having a first end connected to said first end of said second line and a second end connected to said second balanced port.
Claim 35
Dependent Claim
36 words
The 3-line balun transformer as set forth in claim 32 , wherein said first, second and third lines each have a length of λ/4 (λ is a wavelength at a center frequency of an input/output signal).
Claim 36
Dependent Claim
92 words
The 3-line balun transformer as set forth in claim 32 , wherein said transformer satisfies an impedance condition expressed by the following equation: 1 Z 13 - 1 Z 12 = 1 Z 22 - 1 Z 33 = ± 2 Z 0 u Z 0 b where, z mn (m,n=1,2,3) is a characteristic impedance between an mth line and an nth line, Z 0u is a termination impedance of said unbalanced port, and Z 0b is a termination impedance of each of said first and second balanced ports.
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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) | 2008-07-04 | 2009-01-03 | 2009-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-07-04 | 2013-01-03 | 2013-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-07-04 | 2017-01-03 | 2017-07-05 | $7700.00 | Window Closed / Lapsed |