Highly Selective and Compact Filtering Antennas Using Dual-Mode SIW Resonators
Bibliographic record
Abstract
A novel class of compact and highly selective filtering antennas controlling two finite position transmission zeros (TZs) are presented. The filtering antennas are composed of a substrate-integrated waveguide (SIW) filtering doublet and a wideband cavity backed slot antenna (CBSA). Design guidelines are presented to implement bandpass filtering antennas with TZ: above, below, or on opposite sides of the passband. The TZ location is highly flexible relative to the passband and is entirely determined by the input feed offset and via position. Stand-alone devices demonstrating the three via arrangements are presented around 16 GHz. All devices demonstrate a flat passband gain around 5 dB with a single element, direct control over the TZ position, high passband roll-off and out-of-band (OOB) attenuation, and low cross polarization. Compared with the state-of-the-art SIW filtering antennas, the fabricated devices demonstrate the highest combined bandwidth, passband roll-off, and OOB attenuation. In addition, the device with TZ on either side of the passband is sequentially rotated in a$2 \times 2$topology to form a right-handed circularly polarized (RHCP) filtering array with a flat passband gain around 9 dB, retaining the high selectivity.
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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) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| 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".