Patent US8143968B2 successfully refreshed from Google Patents.
US8143968B2
Active / In Force
US
⏱️ 2.7 years remaining
Thin film balun
Assignee: TDK Corp
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Filing: 2009-08-05
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Granted: 2012-03-27
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Expires: 2029-08-05
Abstract
Abstract A thin film balun includes: an unbalanced transmission line which includes two coils; a balanced transmission line which includes two coils and is electromagnetically coupled to the unbalanced transmission line; a first electrode which is connected to the balanced transmission line and constitutes a capacitor; and a second electrode which is connected to a ground terminal and disposed to be opposed to the first electrode and constitutes the capacitor. The second electrode has a section opposed to the coils configuring the unbalanced transmission line or the balanced transmission line, the section being integrally formed with a section opposed to the first electrode.
Inventors
- 👤 Makoto Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:52
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/42; H01; H01P; H01P5/00; H01P5/08; H01P5/10; H10; H10W; H10W20/00; H10W20/40; H10W20/41; H10W20/423; H10W20/495; H10W20/496; H10W20/497; H03H1/00; H03H2001/0021; H03H2001/0078; H03H2001/0085
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
174 words
A thin film balun comprising: an unbalanced transmission line which includes a pair of first coils disposed side by side on a same surface; a balanced transmission line which includes a pair of second coils and is electromagnetically coupled to the unbalanced transmission line, the pair of second coils being disposed on a different surface from that of the pair of first coils and being opposed to the pair of first coils; a first electrode which is connected to both of the second coils constituting the balanced transmission line and constitutes a capacitor; a second electrode which is connected to a ground terminal and disposed to be opposed to the first electrode and constitutes the capacitor; and a DC supply terminal which is connected to the pair of second coils constituting the balanced transmission line and the first electrode constituting the capacitor, wherein the second electrode has a section opposed to at least one of the first coils and the second coils, the section being formed with a section opposed to the first electrode.
Claim 2
Dependent Claim
174 words
A thin film balun comprising: an unbalanced transmission line which includes a pair of first coils disposed side by side on a same surface; a balanced transmission line which includes a pair of second coils and is electromagnetically coupled to the unbalanced transmission line, the pair of second coils being disposed on a different surface from that of the pair of first coils and being opposed to the pair of first coils; a first electrode which is connected to both of the second coils constituting the balanced transmission line and constitutes a capacitor; a second electrode which is connected to a ground terminal and disposed to be opposed to the first electrode and constitutes the capacitor; and a DC supply terminal which is connected to the pair of second coils constituting the balanced transmission line and the first electrode constituting the capacitor, wherein the second electrode has a section opposed to at least one of the first coils and the second coils, the section being formed with a section opposed to the first electrode.
Claim 3
Dependent Claim
37 words
The thin film balun according to claim 1 , wherein the second electrode extends from a region opposed to the first electrode to a region opposed to coil openings of the first coils and the second coils.
Claim 4
Dependent Claim
28 words
The thin film balun according to claim 1 , wherein the second electrode is disposed in a region opposed to both the first coils and the second coils.
Claim 5
Dependent Claim
29 words
The thin film balun according to claim 1 , wherein the first electrode is disposed not to overlap the coil openings of the first coils and the second coils.
Claim 6
Dependent Claim
30 words
The thin film balun according to claim 1 , wherein the first electrode is disposed in a region opposed to coil conductors of the first coils or the second coils.
Claim 7
Dependent Claim
25 words
The thin film balun according to claim 1 , wherein the first electrode is disposed not to overlap the first coils and the second coils.
Claim 8
Dependent Claim
40 words
The thin film balun according to claim 1 , wherein the first electrode is disposed to be symmetrical with respect to an imaginary line which divides the pair of first coils or the pair of second coils into individual coils.
Claim 9
Dependent Claim
32 words
The thin film balun according to claim 1 , wherein a first leading wire connecting the pair of first coils is formed of a different layer than the pair of first coils.
Claim 10
Dependent Claim
32 words
The thin film balun according to claim 8 , wherein a second leading wire connecting the pair of second coils is formed of a different layer than the pair of second coils.
Claim 11
Dependent Claim
30 words
The thin film balun according to claim 1 , wherein a first leading wire connects respective ends of the pair of first coils via a first pair of through holes.
Claim 12
Dependent Claim
30 words
The thin film balun according to claim 10 , wherein a second leading wire connects respective ends of the pair of second coils via a second pair of through holes.
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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) | 2015-03-27 | 2015-09-26 | 2016-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2019-03-27 | 2019-09-26 | 2020-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2023-03-27 | 2023-09-26 | 2024-03-27 | $7700.00 | Window Closed / Lapsed |