A 2-stage, 50Ω RF-DC Charge-pump with Load Lines for high RF-DC Voltage Conversion
Bibliographic record
Abstract
A novel 2-stage RF-DC charge-pump circuit (RFCP) with a 50 ohm input impedance and higher RF-DC voltage conversion without an external input-matching network or output DC-filter for ambient wireless energy-harvesting (WEH) in the 2.4 GHz band is presented. The novelty of this RFCP is the use of near quarter-wavelength transmission lines on the load-side of each half-wave rectifying stage in the RFCP to induce a standing wave maxima at each of the diode inputs at 2.4 GHz. Doing so minimizes diode losses and maximize RF-DC voltage conversion of the charge-pump while still achieving a near 50 ohm input impedance. Simulations and measurements show the proposed design generating a higher DC output of 2.12V and energy efficiency of 18% with just -6dBm of RF input; an RF sensitivity of -7.2dBm for 1.8V output; and a 50Ω input impedance (reflection coefficient = -11dB) in the 2.4 GHz band.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.006 | 0.002 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".