Aperture area enhancement in circularly polarized microstrip patch arrays using square patches with shorting pins
Bibliographic record
Abstract
Circular polarization has always been very effective for many radio systems, such as communications, remote sensing, navigation and radar systems. In these systems, it is desirable for the ground terminal to have a low-profile and lightweight antenna. Additionally, high gain, electronic beam scanning, beam shaping, and low sidelobe-radiation patterns are often required [1]. Microstrip patch arrays satisfy all of the above requirements along with low cost of fabrication. Circular polarization in microstrips is achieved by different methods some of which include: use of multiple feeds, corner feeds, tilted slot placed on the element, elliptical patch element, square patch with slanted corners, circular patch with perturbations, etc. In these methods, two orthogonal modes of equal amplitude and a differential phase of ±90° degrees are excited. In this paper, circularly polarized arrays with shorted metallic patches (SMP) placed in the vicinity of the radiating element are studied. It is shown that the implementation of the SMP in a four element array can have significant improvements on the gain as well as the matching of the elements. All the results have been simulated on infinite ground using Ansoft Ensemble 8.
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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) | 0.000 | 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) | 0.001 | 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 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".