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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Yong-Sub Lee Mun-Woo Lee Sang-Ho Kam Yoon-Ha Jeong |
| Copyright Year | 2001 |
| Abstract | A new wideband distributed Doherty amplifier (WDDA) for wideband code division multiple access (WCDMA) repeater applications is reported. The distributed structure provides wideband performance while not needing an N-way splitter and combiner. The two-stage Doherty amplifiers achieve high gain and high efficiency. Also, the linearity of the WDDA is improved by the post-distortion using gate bias optimization of the Doherty amplifiers. For verification, the proposed WDDA is implemented using GaN HEMTs and tested with a one-carrier WCDMA signal at 2.14 GHz. From the measured results at an average output power of 36 dBm (10 dB back-off power), the WDDA shows an adjacent channel leakage ratio (ACLR) of - 45 dBc at plusmn 5 MHz offset with a total gain over 24 dB and a total power-added efficiency over 15% over a 160 MHz bandwidth. |
| Sponsorship | IEEE Microwave Theory and Techniques Society |
| Starting Page | 668 |
| Ending Page | 670 |
| Page Count | 3 |
| File Size | 574455 |
| File Format | |
| ISSN | 15311309 |
| Volume Number | 19 |
| Issue Number | 10 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-10-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Broadband amplifiers Distributed amplifiers Multiaccess communication Repeaters Wideband Linearity Gallium nitride HEMTs MODFETs Testing wideband code division multiple access (WCDMA) Adjacent channel leakage ratio (ACLR) distributed amplifier Doherty amplifier efficiency |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electrical and Electronic Engineering |
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