GaN power amplifier with harmonic controlled by dual band-notched UWB bandpass filter
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Bibliographic record
Abstract
In this paper, a new type of GaN HEMT power amplifier (PA) using dual band-notched UWB (Ultra Wideband) bandpass filter which is proposed to control harmonic components at 2.14 GHz is designed and tested. The dual band-notched UWB bandpass filter is constructed by three hairpin fingers and two pairs of folded fingers added on both side extremities, so that it can suppress 6.42 GHz and 10.7 GHz by 16.1 dB and 20.3 dB concurrently with low insertion loss at fundamental frequency 2.14 GHz. For this amplifier, second and fourth harmonics are rejected by the bias circuit, while third and fifth harmonics are rejected by the filter. Due to the interdigital hairpin line structure of the filter, the blocking capacitor is not needed in the load matching network. Comparing with the harmonic control structure constructed by conventional λ/4 transmission line, the size of this amplifier circuit is reduced. The measured maximum PAE is 66.3% with 37.5 dBm output power at 2.14 GHz. The maximum gain is 14.7 dB.
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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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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