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| Content Provider | IET Digital Library |
|---|---|
| Author | Mung, S. W. Y. Chan, W. S. |
| Abstract | A wideband phase inverter (WPI) integerated in a Doherty power amplifier (DPA) is proposed for linearity improvement. This WPI is integrated at the output of the carrier amplifier in the DPA while keeping the same size as the conventional DPA. The input signal is excited at both the carrier and the peaking amplifiers and then the amplified signals are combined by the push–pull toplogy. This results in the cancellation of the even-order harmonic terms as well as the cancellation of IMD3 by proper bias selection. An experiment shows the peak power-added efficiency (PAE) is around 50% at 21 dBm output power with linearity improvement as the adjacent channel leakage ratio (ACLR) under a wideband code division multiple access signal is around −40 dBc. This improves around 7 dB in ACLR under the same output power and PAE and better error vector magnitude (EVM) compared with the single-stage class AB amplifier. |
| Starting Page | 771 |
| Ending Page | 773 |
| Page Count | 3 |
| ISSN | 00135194 |
| Volume Number | 51 |
| e-ISSN | 1350911X |
| Issue Number | Issue 10, May (2015) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/el/51/10 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/el.2015.0393 |
| Journal | Electronics Letters |
| Publisher Date | 2015-05-01 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | ACLR Adjacent Channel Leakage Ratio Amplified Signal Amplifiers Carrier Amplifier Code Division Multiple Access Doherty Power Amplifier DPA Error Vector Magnitude Even-order Harmonic Term Cancellation EVM IMD3 Cancellation Invertors Linearity Improvement Multiple Access Communication Peak PAE Peak Power-added Efficiency Peaking Amplifier Power Amplifier Proper-bias Selection Push-pull Toplogy Single-stage Class AB Amplifier WCDMA Signal Wideband Code Division Multiple Access Signal Wideband Phase Inverter WPI |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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