A BROADBAND DUAL-INFLECTION POINT RF PREDISTORTION LINEARIZER USING BACKWARD REFLECTION TOPOLOGY
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Bibliographic record
Abstract
This paper presents a ∞exible and generic broadband RF predistortion linearizer designed using backward re∞ection topology that can correct for the dual-in∞ection point type compression characteristics usually encountered in the gain proflle of metal semiconductor fleld efiect transistor (MESFET) based power ampliflers. It employs circuit conflguration of two parallel Schottky diodes with one p-intrinsic-n (PIN) diode in parallel, connected at two ports of a 90 - hybrid coupler. The Schottky diodes are coupled via a quarter wave transmission line segment which generates dual in∞ection points in the gain characteristics of the linearizer. The incorporation of a PIN diode helps in improving the achievable range in the gain and phase characteristics of the linearizer. Overall, the linearizer is capable of linearizing various types of power ampliflers owing to the ∞exible control on the linearizer's parameters and eventually the gain and phase characteristics of the linearizer. The proposed linearizer can be employed in the frequency range of 1.4{2.8GHz and can simultaneously improve the third- and flfth-order intermodulation distortions. The measurements carried out on a commercial ZHL-4240 gallium arsenide fleld efiect transistor (GaAs FET) based power amplifler demonstrates the broadband functionality of the proposed linearizer.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.002 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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