A New Design of a Wideband Fractal Antenna for RF Energy Harvesting Applications at 5.8 GHz
Bibliographic record
Abstract
This paper introduces the design and evaluation of a wideband fractal antenna intended for RF energy harvesting applications operating near 5.8 GHz. The antenna employs a coplanar waveguide (CPW) feed, enhancing impedance matching and simplifying integration into RF systems. To achieve improved bandwidth, gain, and radiation efficiency while maintaining a compact form factor, a fractal structure is mounted on a 1.6 mm thick FR4 substrate with a dielectric constant of 4.4 and a loss tangent of 0.025. Simulations carried out using Advanced Design System (ADS) and CST Microwave Studio, both full-wave electromagnetic solvers, demonstrate a broad input impedance bandwidth. These results confirm the antenna’s effective operation within the Industrial, Scientific, and Medical (ISM) band, positioning it as a strong candidate for wireless power transfer, lo-power IoT devices, and sensor network applications.
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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".