A Compact Self-Triplexing Antenna for Head Implants
Why this work is in the frame
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Bibliographic record
Abstract
This article introduces a novel self-triplexing implantable antenna designed to operate in head implants. It works at three distinct frequency bands: 403 MHz on Port 1, 915 MHz on Port 2, and 1410 MHz on Port 3. The antenna design incorporates a high-permittivity laminate and triangular meandered resonators, which extend the current path and enable significant miniaturization. The resulting antenna occupies a volume of only <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$8\times 12.5\times 0.3$ </tex-math></inline-formula> mm (30 mm3). An ultra-thin substrate of 0.3 mm is utilized to reduce mutual coupling between the ports, achieving values below −24.3 dB. By activating each port of the antenna with 1W power, the 10-g specific absorption rate (SAR) values are recorded at 45.9, 42.4, and 41.2 W/kg for the frequencies 403, 915, and 1410 MHz, respectively. The antenna exhibits peak gains of −35.7, −31.3, and −28.6 dBi at the respective frequencies. Comprehensive link budget and SAR analyses demonstrate the antenna’s potential for head implant applications. The validation of the fabricated prototype is conducted through measurements inside minced pork meat. Additionally, two software-defined radios are used to practically validate the simultaneous transmit and receive capabilities. To the authors’ knowledge, this is the first self-triplexing implantable antenna, a promising choice for next-generation implantable devices.
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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) | 0.000 | 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 it