Single-Feed Multifunctional Reflectarray Enabling Quad-Polarization Switching and Wide-Angle Scanning
Bibliographic record
Abstract
This letter presents a reconfigurable reflectarray (RRA) capable of generating quad-polarization scanning beams with a fixed linearly polarized (LP) feed. Each element integrates four PIN diodes, providing 1-bit phase control for LP waves and 2-bit control for circular polarization (CP) waves. Using a beam-coding strategy inspired by Pancharatnam–Berry (PB) phase manipulation, the reflectarray can switch among LP, cross-LP, left-hand CP (LHCP), and right-hand CP (RHCP) states. Notably, distinct 1-bit and 2-bit phase compensations are employed for the LP and CP modes, respectively. A 16 × 16 Ku-band prototype was fabricated and experimentally characterized. Measurements demonstrate beam scanning up to ±60°, with peak gains exceeding 21 dBi and 3-dB gain bandwidths of 19.0% in LP mode, 19.5% in cross-LP mode, and 16.9% in both CP modes. Compared with prior works, the proposed design achieves wider bandwidth and quad-polarization reconfigurability with a structurally simpler single-feed configuration, making it attractive for polarization-diverse applications such as satellite communications, airborne platforms, and emerging wireless systems.
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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 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 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".