Wideband via-Loaded Cylindrical Open-Ended SIW Cavity Antenna
Bibliographic record
Abstract
A composite cavity-based antenna is proposed and presented in this work. Three kinds of modes of the composite structure are involved to obtain a wide bandwidth: the TE11= cavity mode of a cylindrical open-ended substrate integrated waveguide cavity, the odd TEM mode generated by loading two rectangular via holes inside the cavity, and the higher-order loop modes (L3 and L5) of a circular ring detached from the cavity by a circumferential slot located at the cavity’s side wall. In the implementation of the antenna, slot coupling feeding methodology is applied, which also introduces a resonance for the bandwidth enhancement. A simulated fractional impedance bandwidth of 57.3 % with |S11|<-10dB from 24.9 GHz to 44.9 GHz is achieved (|S11|=-9.7dB at f=27.7GHz is ignored). The antenna has a broadside radiation pattern within the operating frequency band and a maximum simulated broadside gain of 10.6 dBi at f=27 GHz. Multi-layer technique and metallized via holes processing, which become commercial nowadays, are two critical techniques of the presented antenna. The simple structure is benefit of the fabrication and the integration with other planar front-end circuits. The antenna is fabricated and experimentally verified. A small difference is observed between the measurement and the simulation. A measured fractional bandwidth of 52 % from 27 GHz to 46 GHz (|S11|=-9dB at f=29 GHz is ignored) and a measured maximum broadside gain of 9.5 dBi are achieved.
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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 | 0.001 | 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 | 0.001 |
| 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".