Early demonstration of a passive millimeter-wave imaging system using substrate integrated waveguide technology
Bibliographic record
Abstract
Majority of the reported millimeter-wave (MMW) imaging systems are constructed on the basis of conventional waveguide technology as this technology is known to provide the best performance over higher frequency ranges. This paper proposes and presents an alternative platform of technology based on the substrate integrated waveguide (SIW) technology. Early results in the development of an SIW passive millimeter-wave imaging system are reported and discussed in this work. This technology presents many advantages over the conventional waveguide technology such as lower cost, smaller size, integrability with printed circuit board (PCB) technologies, compactness, as well as low interference susceptibility. An SIW passive imaging system operating at 35 GHz intended for concealed weapon detection is demonstrated at its early stage. It consists of a mechanically scanning reflector antenna, an SIW direct receiver and a computer running data acquisition software. The direct receiver presents a 1.5 GHz bandwidth centered at 35 GHz, 2.7 dB noise figure, and 48 dB gain. It was built upon interconnecting SIW sub-circuits in a LEGO manner which is appropriate for system prototyping. Resulting images for different scenarios are presented and the system operability is demonstrated.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| 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".