A Compact, High Tuning Accuracy and Enhanced Linearity 37-43 GHz Digitally-Controlled Vector Sum Phase Shifter
Bibliographic record
Abstract
This paper presents a compact digitally controlled vector sum phase shifter (DC-VSPS) capable of precise gain and phase control across a wide bandwidth. The DC-VSPS utilizes a pair of differential variable gain amplifiers (VGAs) designed to optimize gain and phase tuning accuracy. Moreover, it incorporates differential transformers-based output combiner and input quadrature hybrid, enhancing integration, bandwidth, and matching performance. A 6-bit DC-VSPS prototype was successfully designed and fabricated using the 45 nm silicon-on-insulator (SOI) CMOS technology, occupying a minimal core area of $0.084 \mathrm{~mm}^{2}$. Experimental results demonstrate an excellent tuning range of 360° for phase control with a resolution of 6 bits and 14 dB for gain control with 1 dB resolution. Furthermore, comprehensive measurements indicate excellent performance over the frequency range of 35-43 GHz, with total root-mean-square (RMS) phase error, total RMS gain error, and group delay variation all within 1.5°, 0.24 dB, and ±12 picoseconds, respectively. The prototype also exhibits input-referred 1dB gain compression power levels exceeding 4 dBm and input-output return losses better than 9 dB across the entire bandwidth.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 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 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".