Multibit Electrically Reconfigurable Circularly Polarized Reflectarray Elements Based on Pancharatnam–Berry Phase Principle
Bibliographic record
Abstract
PIN diode-based reconfigurable reflectarray antennas have gained attention for their flexible beam-steering, simplified design, and cost effectiveness. However, many existing designs offer only 1- or 2-bit phase reconfigurability, limiting radiation performance. In this letter, we present Ku-band reflectarray elements with both 2-bit and 3-bit electrical phase control for circular polarization. By leveraging the Pancharatnam-Berry phase principle, dynamic phase control is achieved through PIN diode switching. The proposed design is validated using a waveguide simulator (WGS), which confirms the 2-bit phase responses and shows excellent agreement with full-wave simulations. Measured results demonstrate 2-bit phase quantization over an 11.1-12.5 GHz range (11.9% bandwidth) with insertion losses below 1.0 dB and cross-polarization levels under -15 dB. Furthermore, simulated performance of the 3-bit element reveals consistent 45° phase intervals. To verify array-level performance, 16×16 RRAs based on both 2-bit and 3-bit elements are implemented. This multi-bit reconfigurable strategy enhances reflectarray performance and offers increased design versatility for advanced Ku-band 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".