| Presentation | 2014-03-05 Modulation Accuracy of a Polar-Modulation EPWM Transmitter with a NMOS-type Class-D Power Amplifier Yoshiharu Iikura, Yohtaro Umeda, Yusuke Kozawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Switching-mode power amplifiers for wireless communication systems demand high power efficiency and linearity. Of the available types of high-efficiency switching-mode power amplifiers, envelope pulse-width modulation (EPWM) transmitters are advantageous because of their high power efficiency and linearity. A polar-modulation EPWM transmitter with a class-E power amplifier has high power efficiency but exhibits degraded error vector magnitude (EVM) performance if a lumped-element inductor is used for blocking signals in the power-supply line. This degradation is caused by phase distortion due to parasitic capacitance change of a transistor. This change is caused by a transient response biase in the transistor of the amplifier that occur when a burst RF signal is received. Through simulation, this paper demonstrates that the EVM performance of a class-D power amplifier is superior to that of a class-E power amplifier. In addition, the output power, drain efficiency, and power-added efficiency of the two power amplifier classes are compared. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | transmitter / power amplifier / class E / class D / envelope pulse-width modulation / EPWM / error vector magnitude / power add efficiency |
| Paper # | MW2013-221 |
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| Conference Information | |
| Committee | MW |
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| Conference Date | 2014/2/25(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Microwaves (MW) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Modulation Accuracy of a Polar-Modulation EPWM Transmitter with a NMOS-type Class-D Power Amplifier |
| Sub Title (in English) | |
| Keyword(1) | transmitter |
| Keyword(2) | power amplifier |
| Keyword(3) | class E |
| Keyword(4) | class D |
| Keyword(5) | envelope pulse-width modulation |
| Keyword(6) | EPWM |
| Keyword(7) | error vector magnitude |
| Keyword(8) | power add efficiency |
| 1st Author's Name | Yoshiharu Iikura |
| 1st Author's Affiliation | Department of Electrical Engineering, Graduate School of Science and Technology, Tokyo University of Science() |
| 2nd Author's Name | Yohtaro Umeda |
| 2nd Author's Affiliation | Department of Electrical Engineering, Graduate School of Science and Technology, Tokyo University of Science |
| 3rd Author's Name | Yusuke Kozawa |
| 3rd Author's Affiliation | Department of Electrical Engineering, Graduate School of Science and Technology, Tokyo University of Science |
| Date | 2014-03-05 |
| Paper # | MW2013-221 |
| Volume (vol) | vol.113 |
| Number (no) | 460 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |