Digitally-Assisted 27-33 GHz Reflection-Type Phase Shifter with Enhanced Accuracy and Low IL-Variation
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Bibliographic record
Abstract
This paper presents a new millimeter-wave 360 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">o</sup> digitally-assisted reflection-type phase shifter (DA-RTPS). It is composed of a cascade of three compact, low-loss and fully-differential transformer-based hybrid couplers with two of their ports terminated by switch-controlled capacitor banks. Each stage is configured to produce a phase change of up to 60°. An additional phase inverting stage is used to attain 360° of phase shift. The proposed DA-RTPS arrangement enabled low insertion loss (IL) variation and enhanced phase accuracy compared to single-stage RTPS-based typologies. A proof-of-concept prototype, implemented using 45nm silicon-on-insulator CMOS technology, demonstrated a 1-dB RF bandwidth spanning from 27 to 33 GHz, a low root-mean-square phase error of 0.3°, and an IL of 6.8 dB±0.25dB, while covering 360° of phase shift at 5.6°resolution. Furthermore, it maintained a group delay below ±12ps and an input 1dB compression point >7.3 dBm at all phase-shift settings between 27 and 33 GHz.
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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 | 0.000 | 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 it