Wideband Narrow-Beam 16-Element Two-Port MIMO Array Antenna With High Isolation for Automotive Radar and 5G Millimeter Wave Applications
Bibliographic record
Abstract
An eight-element linear array antenna is designed to provide a narrow beam, wide bandwidth, and high gain for compact electronic devices while mitigating propagation losses. The design is extended to a two-port MIMO array to enhance channel capacity and reduce RF chain complexity, and can be further scaled to an N-port configuration. A parallel feeding network ensures uniform power distribution. Wideband impedance matching and self-decoupling are achieved by optimizing the ground plane using characteristic mode theory (CMT). Both array and MIMO antennas are fabricated and measured, validating the simulations. The array antenna demonstrates good matching from 20.7 to 42.4 GHz and exhibits circular polarization (CP) with 3 dB axial ratio over 37.5-40.5 GHz atθE = 20∘. The MIMO antenna shows similar matching and CP performance over 37.5-39 GHz. Both achieve narrow beamwidths of 16.5∘-7.5∘ in YZ-plane (H-plane) and fan-shaped beams in the XZ-plane (E-plane), with sidelobe levels between -7 and -16 dB. The MIMO antenna meets all diversity metrics, achieving isolation better than 30.5 dB. Further, the MIMO antenna performance is verified with the frequency-modulated wave and beam-steering radar architecture for automotive radar applications.
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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".