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| Content Provider | IET Digital Library |
|---|---|
| Author | Shi, Weimin He, Songbai Gideon, Naah |
| Abstract | In this study, a methodology is proposed for extending the high-efficiency power range (HEPR) of symmetrical Doherty power amplifiers (DPAs). This method takes advantage of the output impedance of peaking stage. Traditional symmetrical DPAs maintain high efficiency over a 6 dB power range with an assumption of the output impedance of peaking stage being infinity. This study reveals that the HEPR can be further enhanced by tuning the output impedance of peaking stage away from infinity and changing the phase delay of the impedance inverter after carrier power amplifier. A 2.2–2.3 GHz symmetrical DPA with an HEPR of 9 dB is fabricated to validate our theory. The experimental results possess drain efficiencies of 45.3–49.5% at 9 dB output power back-off level and 62.9–71% at peaking power level over 2.2–2.3 GHz. The maximum output power of the fabricated DPA is 45 dBm with a gain of 11.6–13.5 dB across 2.2–2.3 GHz. |
| Starting Page | 1296 |
| Ending Page | 1302 |
| Page Count | 7 |
| ISSN | 17518725 |
| Volume Number | 11 |
| e-ISSN | 17518733 |
| Issue Number | Issue 9, Jul (2017) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-map/11/9 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-map.2017.0119 |
| Journal | IET Microwaves, Antennas & Propagation |
| Publisher Date | 2017-03-27 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Amplifiers Carrier Power Amplifier DPA Extending High-efficiency Power Range HEPR Output Impedance Peaking Stage Phase Delay Power Amplifier Radio Link And Equipment Radio Network Symmetrical Doherty Power Amplifiers Wireless Communication System |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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