77 Ghz Series-Fed $4 \times 7$ Antenna Array with Enhanced Sidelobe Suppression for Automotive Radars
Bibliographic record
Abstract
The design and analysis of a series-fed microstrip patch antenna array for an automotive radar at 77 GHz are presented. The antenna allows object detection within a 10 to 250 meter range. It meets the required stringent beamwidths:$\boldsymbol{\pm} \mathbf{1 5}^{\circ}$in the azimuth plane and$\pm 5^{\circ}$in the elevation plane, which can precisely cover the field of view while minimizing undesired vertical spread. The series-fed array offers high directivity, compact form factor, and a simplified feeding network attributes considered critical for space- and cost-constrained automotive integration of radar. Low sidelobes are achieved by enforcing Taylor's aperture distribution for the azimuthal and elevation radiation patterns. Accordingly, several comprehensive HFSS simulations are made to verify the performance. The antenna resonates at 77 GHz, achieving a return loss of 22.5 dB and a peak gain of around 19.9 dB. The final configuration is a planar array of$4 \times 7$elements that has achieved the desired beamwidths.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.002 |
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 source (direct Gemma or distilled Codex), 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".