A high-power solid-state RF source driven by a doubly-differential signal
| Autor: | Sanggeun Jeon, David B. Rutledge |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Engineering
business.industry Transistor RF power amplifier Mode (statistics) Electrical engineering Condensed Matter Physics Signal Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Power (physics) law Thermal Power semiconductor device Electrical and Electronic Engineering Differential (infinitesimal) business |
| Zdroj: | Microwave and Optical Technology Letters. 52:1489-1492 |
| ISSN: | 1098-2760 0895-2477 |
| Popis: | This letter presents a new solid-state RF source generating kW-level output power at HF band. Four power transistors are driven in a doubly-differential way, operated in a switching mode, and combined together to produce high output power. A multilayered input feed network is carefully designed, such that an accurate doubly-differential signal is provided to the transistors. The output matching and combining circuitry is optimized toward a high efficiency. The implemented RF source produces a CW signal of 1.5 kW at 29 MHz with a drain efficiency of 85%. The measured high efficiency is attributed to the well-balanced and symmetric switching-mode operation of each transistor, which is verified experimentally by a thermal image. |
| Databáze: | OpenAIRE |
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