Thin film balun
Abstract
Abstract The present invention provides a thin film balun capable of preventing a resonant frequency from being increased to a high frequency, and thus realizing a preferable passage characteristic. A thin film balun 1 includes: an unbalanced transmission line 2 having a first coil portion C 1 and a second coil portion C 2 ; and a balanced transmission line 3 having a third coil portion C 3 and a fourth coil portion C 4 which are magnetically coupled with the first coil portion C 1 and the second coil portion C 2 , respectively. The first coil portion C 1 is connected to an unbalanced terminal T 0 , and the second coil portion C 2 is connected to a ground terminal G (ground potential) via a capacitor D (C component). The third coil portion C 3 is connected to a balanced terminal T 1 and the fourth coil portion C 4 is connected to a second balanced terminal T 2 . The capacitor D is provided, in a plan view, in an area S 1 between the outer end of the unbalanced terminal T 0 and the outer end of the ground terminal G.
Inventors
- 👤 Makoto Endo
Bibliographic Details
Claims Analysis
Total Claims: 5References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2015-06-19 | 2015-12-19 | 2016-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2019-06-19 | 2019-12-19 | 2020-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2023-06-19 | 2023-12-19 | 2024-06-19 | $7700.00 | Window Closed / Lapsed |