A Compact Millimeter Wave Polarization Reconfigurable Double Patch Antenna
Bibliographic record
Abstract
A polarization-reconfigurable single-fed patch antenna loaded with a smaller parasitic stacked bandwidth-enhancing patch are reported in this letter. The antenna system is optimized to operate at 29 GHz with three polarization modes that can be reconfigured electronically. The structure consists of two Rogers 3003 substrates of thicknesses of 0.25 and 0.50 mm for the driven antenna and the parasitic one, respectively. The main antenna's ground layer has four square loops etched out to excite the current paths on the driven patch needed for circular polarizations. These four slot loops are placed in the driven patch's four corners and are controlled with four P-I-N didoes. By shorting two diagonally placed slot loops, a circular polarization (CP) mode is created while shorting all of them will result in linearly polarized (LP) radiation. The measured gain and relative impedance bandwidth (BW) of the left-hand circular polarization (LHCP) are 3.1 dB and 5.4%, respectively. Similar results are obtained for the RHCP due to symmetry in structure and biasing conditions. The LP case reached a gain of 4.0 dB and a relative impedance BW of 5.45%. The overall size of the antenna system is 10.2×14.1×0.784 mm3with a radiation efficiency above 90%. Measurement results are compared and validated with simulations.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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 | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".