Capacitively center-loaded transmission lines for compact E-band 90° couplers
Why this work is in the frame
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Bibliographic record
Abstract
A compact 80-GHz band (81–86 GHz) 90° coupler using capacitively center-loaded microstrip transmission lines is proposed. The coupler is implemented in a 0.15 µm GaAs pHEMT technology and has longitudinal and transverse arms of the same characteristic impedances of 50-Ω to reduce the effect of manufacturing tolerance and to facilitate the layout. The experimental results demonstrated a phase difference close to 87o and an amplitude imbalance of less than 1 dB over the entire frequency band of interest (81–86 GHz). The measured return loss is less than −11 dB and the isolation is better than 15 dB. The proposed coupler is well suited for low-cost, high performance, ultra high data rate transceivers for E-band wireless communication systems.
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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) | 0.001 | 0.001 |
| 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 it