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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ildu Kim Jeonghyeon Cha Hong, S. Bumman Kim Young Yun Woo Cheon Seok Park Bumman Kim |
| Copyright Year | 2001 |
| Abstract | We have demonstrated a high linear three-way Doherty amplifier by applying uneven power drive and optimizing the peaking biases and load impedances. The amplifier has been implemented at 2.14GHz using 190-W peak envelope power laterally diffused metal-oxide-semiconductor field-effect transistors. For comparison, a class AB biased amplifier is tested as it's counterpart. The two-tone signal and forward-link wideband code-division multiple access (WCDMA) signal have been selected as test signals. At 42dBm (12.5-dB backed-off output power), there are large improvements in the third- and fifth-order intermodulation distortions. For the forward-link four-carrier WCDMA signal, the adjacent channel leakage ratio (ACLR) performances at 5-MHz and 10-MHz offsets are -52.5dBc and -53.4dBc, respectively, and satisfy the generally medium high power amplifier linearity target without using any other linearization circuits. In comparison with the class AB amplifier, the three-way Doherty amplifier with uneven power drive has 9.8-dB lower ACLR at 5-MHz offset while maintaining a comparable drain efficiency of 10.2%. |
| Sponsorship | IEEE Microwave Theory and Techniques Society |
| Starting Page | 176 |
| Ending Page | 178 |
| Page Count | 3 |
| File Size | 225558 |
| File Format | |
| ISSN | 15311309 |
| Volume Number | 16 |
| Issue Number | 4 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2006-04-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | High power amplifiers Repeaters Broadband amplifiers Multiaccess communication Power amplifiers Testing Impedance FETs Wideband Power generation wideband code-division multiple access (WCDMA) Adjacent channel leakage ratio (ACLR) Doherty amplifier third- and fifth-order intermodulation distortion (IMD3, IMD5) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electrical and Electronic Engineering |
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