Highly Efficient Unidirectional Twin Arc-Slot Antennas on Electrically Thin Substrates
Bibliographic record
Abstract
Unidirectional, highly-efficient planar twin arc-slot antenna elements backed by a reflector are presented. The theoretical radiation efficiency is as high as 99.9%. This high efficiency is achieved because the proposed slot geometry reduces the coupling to the parallel-plate TEM mode effectively in all directions on the substrate plane. A corporate-fed as well as a compact, center-fed, twin arc-slot elements have been implemented and tested. The parallel-plate TEM substrate patterns for a representative twin arc-slot element have been measured and compared with those of a corresponding straight twin-slot element. It was verified that the parallel-plate TEM mode, coupled from the proposed twin arc-slot element is greatly reduced in all directions. The measured gain improvement when a back-reflector is added is found to be about 2.8 dB, further validating this high efficiency. In addition to the high radiation efficiency, the proposed twin arc-slot element is more compact compared to the corresponding, straight, full-wavelength twin-slot element, making it well-suited for two-dimensional antenna arrays.
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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 | 0.001 |
| 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".