High frequency power amplifier
Abstract
Abstract A high frequency power amplifier includes: a pair of power amplifying elements; a power divider, provided in the vicinity of an input terminal of the high frequency power amplifier, for supplying the pair of power amplifying elements with signals, respectively, the signals having an identical amplitude with each other and having reverse phases from each other; and a power synthesizer, provided in the vicinity of an output terminal of the high frequency power amplifier, for synthesizing signals output from the pair of power amplifying elements, the signals having an identical amplitude with each other and having reverse phases from each other. Output terminals of the power amplifying elements are connected to each other through a third-order harmonic component controlling circuit, and the third-order harmonic component controlling circuit includes a series connection of a transmission line having a length of {fraction (1/12)} of a fundamental wavelength, a capacitor, and another transmission line having a length of {fraction (1/12)} of the fundamental wavelength.
Inventors
- 👤 Shigeru Morimoto
- 👤 Masahiro Maeda
Bibliographic Details
Claims Analysis
Total Claims: 4References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-03-12 | 2004-09-11 | 2005-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-12 | 2008-09-11 | 2009-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-12 | 2012-09-11 | 2013-03-13 | $7700.00 | Window Closed / Lapsed |