InGaP/GaAs HBT Broadband Power Amplifier IC with 54.3% Fractional Bandwidth Based on Cascode Structure
Bibliographic record
Abstract
This paper presents the development of a broadband two-stage cascode PAIC with a fractional bandwidth of 54.3% using a 2- m InGaP/GaAs HBT process. The higher supply voltage of the cascode PA results in a lower current, which can be advantageous for broadband operation because of the lower impedance transformation ratio of the output matching network. According to bandwidth analysis based on the power and efficiency contours at the internal plane of the transistor, an optimized shunt inductor for a single L-section load matching network is proposed to increase the bandwidth of the cascode PA by compensating for the output capacitance. The proposed PAIC was designed and implemented for the frequency band from 1.55 to 2.65 GHz. Using an LTE signal with a PAPR of 7.5 dB and a signal bandwidth of 10 MHz, a power gain of more than 23.7 dB, PAE from 30.9 to 38.4%, and average output power from 26.7 to 27.7 dBm were obtained at a given ACLR of -30 dBc.
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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) | 0.001 | 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 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".