| 发明名称 | Wideband impedance transformer | ||
| 摘要 | Embodiments of a low-complexity and potentially physically small wideband impedance transformer that can be used in a combining network of a wideband Doherty amplifier are disclosed. In one embodiment, a wideband Doherty amplifier includes Doherty amplifier circuitry and a wideband combining network. The wideband combining network includes a wideband quarter-wave impedance transformer that includes a quarter-wave impedance transformer and compensation circuitry connected in parallel with the quarter-wave impedance transformer at a low-impedance end of the quarter-wave impedance transformer. The compensation circuitry is configured to reduce a total quality factor of the wideband quarter-wave impedance transformer as compared to a quality factor of the quarter-wave impedance transformer, which in turn increases a bandwidth of the wideband quarter-wave impedance transformer, and thus a bandwidth of the wideband Doherty amplifier. | ||
| 申请公布号 | US9537198(B2) | 申请公布日期 | 2017.01.03 |
| 申请号 | US201414305808 | 申请日期 | 2014.06.16 |
| 申请人 | Telefonaktiebolaget L M Ericsson (publ) | 发明人 | Seneviratne Sashieka;Spokoinyi Igor |
| 分类号 | H01P5/02;H01P5/12;H01P1/203 | 主分类号 | H01P5/02 |
| 代理机构 | Withrow & Terranova, PLLC | 代理人 | Withrow & Terranova, PLLC |
| 主权项 | 1. A wideband quarter-wave impedance transformer, comprising: a quarter-wave impedance transformer; and compensation circuitry connected in parallel with the quarter-wave impedance transformer at a low-impedance end of the quarter-wave impedance transformer, the compensation circuitry configured to reduce a total quality factor of the wideband quarter-wave impedance transformer as compared to a quality factor of the quarter-wave impedance transformer. | ||
| 地址 | Stockholm SE | ||