Digitally Assisted 28 GHz Active Phase Shifter With 0.1 dB/0.5° RMS Magnitude/Phase Errors and Enhanced Linearity
Why this work is in the frame
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Bibliographic record
Abstract
This brief presents a new digitally assisted vector-summing phase shifter (DA-VSPS) featuring high accuracy and enhanced linearity. It begins by highlighting the RF performance degradation of traditional DA-VSPSs operating at millimeter-wave frequencies due to the large number of unit-cells and the significant underlying parasitics. Then, a new DA-VSPS topology is proposed to mitigate this source of performance degradation using analog variable-gain amplifiers with digitally assisted current sources. A study of the accuracy and linearity of the proposed DA-VSPS is conducted to inform the choice of the optimal parameters (number of unit-cells and load impedance) that maximize the RF performance while minimizing the implementation complexity. A proof-of-concept prototype was implemented in 45 nm silicon-on-insulator CMOS technology. The measurement results demonstrated a 1-dB RF bandwidth from 27 to 33 GHz, root-mean-square magnitude and phase errors of 0.1 dB and 0.5° to 0.6°, respectively, while covering 360° of phase shifts at 5° resolution. Furthermore, the measured group delay and input 1dB compression point are maintained within ± 4 ps and >2.2 dBm, respectively, at any phase shift settings.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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