FSS-Based Spatially Decoupled Back-to-Back Four-Port MIMO DRA With Multidirectional Pattern Diversity
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Bibliographic record
Abstract
This letter presents a frequency selective surface (FSS)-based four-port multiple-input-multiple-output cylindrical dielectric resonator antenna (cDRA) system that supports multidirectional pattern diversity characteristics. The back-to-back arrangements of the cDRA as well as the use of an FSS are some of the features of the proposed antenna design. The cDRAs are positioned over a substrate through a common ground plane. The top side has two oppositely faced cDRAs that are excited with the help of ports-1 and 2, via coplanar waveguide-fed conformal striplines. Similar cDRA orientations also exist at the bottom side and are excited by microstrip-line-fed conformal striplines through ports-3 and 4, respectively. To improve isolation and correlation, similar phase-gradient FSSs are placed at the two sides of the substrate. As a result, four diverse radiation patterns are obtained from four ports, which ensure multidirectional pattern diversity characteristics of the proposed antenna. The proposed technique offers more than 10 dB and 75% improvement in isolation and correlation values, respectively. By observing the measured results, it is confirmed that the proposed structure is useful for WLAN access point (5.15-5.35 GHz) applications.
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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 it