Tightly Coupled Hexagonal Antenna Arrays for Multi-Band Massive MIMO Systems
Bibliographic record
Abstract
Tight coupling of antenna elements in a massive multiple input-multiple output (mMIMO) array gives rise to a bandwidth gain, specially in the low-band region and facilitates the multi-band operation with only a single antenna array. In this work, we use a circuit-theoretic communication system model to unify the antenna and communication channel models and show that when the antenna element spacing in a uniform planar array is reduced, the power optimized system capacity increases as a result of the bandwidth gain. We further show that this bandwidth gain is higher in hexagonal array configuration compared to popular square planar array configuration, due to its tighter coupling. Together with the higher diversity gain in the hexagonal array due to the highest antenna packing density, superior bandwidth gain makes the hexagonal mMIMO array configuration to have the highest capacity channels in a multi-band setup which we verify via simulations.
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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 | 0.001 | 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".