Bandwidth Enhanced Doherty Power Amplifier Based on Coupled Phase Compensation Network With Specific Optimal Impedance
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Bibliographic record
Abstract
This paper presents a new technique to dramatically enhance the bandwidth of a post-matching Doherty power amplifier (PM-DPA). This technique relies on using a coupled-line phase compensation network (PCN). Through a theoretical analysis, we first point out this coupled-line PCN can offer wideband impedance matching due to its capacity in reducing the external Q-factor of the peaking branch. Then, our analysis guides the derivation of closed-form formulas that help to determine the physical parameters of the coupled PCN. Finally, when augmented with suitable selected peaking amplifier impedances, the proposed technique allows improved peak efficiency and output power over extended bandwidth. For experimental verification, A DPA based on commercially available GaN high-electron-mobility transistor (HEMT) devices (Cree CGH 40010F) has been designed and fabricated. Measured results of the proposed DPA shows 6 dB back-off operation between 1.3 - 2.3 GHz (55% fractional bandwidth) with efficiency in excess of 41%.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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