Compact SIW-Based Self-Quadruplexing Antenna for Microwave and Mm-Wave Communications
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Bibliographic record
Abstract
A compact self-quadruplexing antenna is presented, using substrate-integrated waveguide (SIW) technology and operating at 5.8, 7.4, 28, and 38 GHz. The design process is based on bisecting diagonally a square cavity into two triangles to obtain two HMSIW cavities. The right-upper corner of the structure is separated by slots to incorporate mm-wave frequencies. By utilizing five capacitive slots, independent frequency tuning in the operating frequency bands is achieved. To the best of our knowledge, this is the most compact quadruplexing antenna in the literature that operates at both mm-wave and microwave frequencies, and it has the best isolation between ports. The size of the antenna is <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$0.25~\lambda _{g}^{2}$ </tex-math></inline-formula> and the isolation between ports is less than −26 dB. A prototype of the antenna is fabricated and measured, showing a good agreement with the simulations, and therefore confirming the design approach.
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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 | 0.001 | 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 it