A frequency tunable embedded normal-mode helix antenna for portable wireless devices
Bibliographic record
Abstract
A frequency tunable normal mode helical antenna is presented for wireless mobile handsets. This antenna is placed across the width of the handset chassis, which is considered as part of the radiating structure. It is shown that by keeping the length of the helix antenna constant and varying the pitch angle (height) of the antenna, the frequency of operation can be tuned to switch between various frequency bands to cover all standard 3G and 4G bands required for the next generation of mobile handsets. Variation of the helix pitch angle is implemented using a shape memory alloy (SMA) spring placed in parallel with the antenna. Extraction and contraction of this spring and therefore the antenna is controlled by passing a DC current through it. FIT simulation results (CST™) are presented for the tunable helix antenna with the SMA spring effect included in the model. Antenna design criteria are also discussed.
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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".