MPT, a universal multi-purpose tuner
Bibliographic record
Abstract
Electro-mechanical microwave tuners are, for several reasons, the preferred solution for in-fixture and on-wafer load pull testing; they provide the highest VSWR (up to 200:1), the highest power handling (up to 400W CW) and resolution (several million tunable points at any frequency), tuning capability to any impedance (due to interpolated tuning), low-pass behavior (because they use a 50/spl Omega/ transmission airline as default media) and comprehensive harmonic tuning. Up to now electromechanical slide screw tuners can be built either as ultra wideband (using two probes of different widths), high VSWR (using a pre-matching stage) or as harmonic rejection tuners, but not all at the same time. Especially disturbing are wideband tuners, when used in load pull testing of highly compressed transistors without separate tuning capability of the harmonics. In this case the effect of uncontrollably dangling harmonic impedances generates non-quantifiable and non-correctable systematic measurement errors, which falsify the basic form of the load pull contours. In order to avoid this phenomenon complex harmonic load pull setups use frequency triplexers and three tuners or two tuners, one wideband and one harmonic rejection tuner, per DUT side. In order to maximize tunable VSWR on wafer, low-loss bend airlines are used. This translates all tuner vibrations to the probes. In order to avoid this phenomenon mechanically balanced tuners and microprocessor motor drives are needed. In this paper we propose a new tuner type, the multi-purpose tuner. It is a wideband slide screw tuner, which uses three independently controllable microwave probes. The use of three probes adds a control dimension to the tuners, which, when employed properly, allows simultaneous applications of the same unit, without any hardware modifications: 1) harmonic tuning (fo, 2fo, 3fo), operational over a wide frequency range without hardware interventions (resonator or triplexer changes); 2) high VSWR (prematching) tuning; 3) ultra stable tuning for on-wafer applications; and 4) ultra wideband tuning.
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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) | 0.000 | 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 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".