Novel wideband GaN HEMT power amplifier using microstrip radial stub to suppress harmonics
Bibliographic record
Abstract
In this paper, a novel wideband GaN HEMT power amplifier (PA) using microstrip radial stub (MRS) in both input and output matching networks to suppress harmonic components of 2.14 GHz is analyzed, fabricated, and tested. The angle subtended by MRS and the bottom length of MRS are analyzed for harmonic suppressing purpose. The wideband harmonic suppressing characteristic of MRS is compared with normal 50 Ohm quarter-wave rectangular stub. The second and third harmonics of 2.14 GHz are suppressed by −38.37 dB and −29.53 dB, respectively. −15 dBc suppressing bandwidth over 1.32 GHz at both harmonic bands is obtained. By using the proposed MRS in both input and output matching network, the measured maximum power added efficiency (PAE) is 80.52% with 40.53 dBm output power at 2.14 GHz. At least 50% PAE and 37 dBm output power over a 12% bandwidth from 2 GHz to 2.26 GHz is achieved. The maximum gain is 20.25 dB.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), 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".