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 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$2 \times 2$ </tex-math></inline-formula> 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 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 | 0.000 | 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) | 0.000 | 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".