Dual‐Band Impedance Transformer Using Four‐Section With a Wide and Flexible Frequency Ratio
Bibliographic record
Abstract
ABSTRACT In this paper, a dual‐band RF rectifier with flexible frequency ratios is presented. To achieve this flexibility, a four‐section transformer is proposed that covers a wide range of the Smith chart impedance, including the region closest to the open‐circuit impedance of the diode. Additionally, a new dual‐band short stub is introduced, designed to ensure proper current feedback without compromising in‐band performance. By combining the dual‐band matching circuit with shorted stubs, a wide frequency ratio is achieved. Two different dual‐band circuits, with frequencies of 0.7/1.2 and 0.7/2.45 GHz, were fabricated and tested to demonstrate the flexibility of the proposed topology. The designs were based on the SMS‐7630 Schottky diode and tested at frequencies below 6 GHz. Experimental results show that the first dual‐band circuit (0.7/1.2 GHz) achieves efficiencies of 70% and 60.5%, while the second dual‐band circuit (0.7/2.45 GHz) has efficiencies of 88.5% and 50%. The maximum voltages reached were 3.8 and 3.45 V, respectively.
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How this classification was reachedexpand
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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 teacher head, 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".