| Autor: |
Michael D. Lockard, Andrew Zai, Kenneth E. Kolodziej, Jeffrey S. Herd |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
2019 IEEE International Symposium on Phased Array System & Technology (PAST). |
| DOI: |
10.1109/past43306.2019.9020929 |
| Popis: |
Analysis shows that multiple time-delayed power amplifiers can share a single envelope tracker and provide a significant improvement over statically supplied amplifiers. Phased arrays are a suitable application of this technique. Our analysis shows a 15 point efficiency improvement over a static supply when amplifying a two-tone signal. We claim that sharing an envelope tracker is justified when $\frac{1}{2} \gg \frac{\Delta f}{f_{0}} \sin(\theta) (N-1$ ), where $\frac{\Delta f}{f_{0}}$ is the fractional bandwidth of the signal, $\theta$ is the maximum steering angle, and $N$ is the number of elements sharing an envelope tracker. Closed form analytic solutions of a two-tone signal are presented to verify the concept. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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