Low-Profile CO-CSRR and EBG Loaded Tri-Quarter Circular Patch EWB MIMO Antenna With Multiple Notch Bands
Bibliographic record
Abstract
A novel and miniaturized design featuring a Co-directional Complementary Split Ring Resonator (CO-CSRR) loaded Tri-Quarter Circular (TQC) Extremely Wideband (EWB) Multiple-Input Multiple-Output (MIMO) antenna has been developed and simulated. This proposed antenna demonstrates high isolation and exhibits multiple notch characteristics. The configuration consists of two TQC patches positioned adjacent to each other with a common partial ground plane (PGP), achieving an Extremely Wideband (EWB) capability of 85.8 GHz. Additionally, two elliptical CO-CSRRs are etched on the TQC elements to introduce dual-notch characteristics in the X-band and Ku-band. The integration of two Electromagnetic Band Gap (EBG) structures on either side of the microstrip feedline facilitates the creation of notch frequency ranges at Q-band downlink and V-band. To enhance isolation, a slotted meandering strip is extruded to the PGP. This design primarily focuses on achieving EWB with a compact size and reduced complexity. The overall physical volume of the proposed design is 2.74 λo × 4.83 λo × 0.25 λo, achieved a maximum |S11| of 30.82 dB at a frequency of 17.58 GHz. The antenna’s performance has been thoroughly evaluated in terms of radiation pattern, isolation, Total Active Reflection Coefficient (TARC), Envelope Correlation Coefficient (ECC), Diversity Gain (DG), Gain, and Efficiency. Stable gain and Group Delay (GD) of less than 0.2 ns for the entire Extremely Wideband (EWB) range have been achieved, with lower gain observed at the notch bands.
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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 | 0.001 | 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".