Analytical Solution of Amplifier-Antenna System’s Impedance Matching Requirement for Reliable Microwave Transmitter
Bibliographic record
Abstract
In this paper, the integration of push-pull class B amplifier and antenna module have been proposed. The high efficiency and low distortion of push-pull class B due to its differential feeding technique makes it a viable candidate as a power amplifier. The aperture-coupled antenna structure is used in this work as it offers the designer various methods to effectively adjust the variables thereby making way for more efficient configuration which can be fabricated on system-on-chip. Moreover, this enables a wide range of values that can be chosen on the Smith Chart thus allowing the conditions needed for odd-mode matching to be satisfied. This matching requirement is specific for only a given transistor and in this work by incorporating bandstop filters made of resonant stubs it has been possible to filter harmonic power up to 3rdharmonic. The frequency of operation of the integrated push-pull transmitting amplifier during simulation is at 2.06 GHz. The Wilkinson power divider, power coupler, phase shifter and bias decoupling circuits have been employed so as to efficiently integrate the push-pull class B power amplifier with the differentially fed aperture coupled antenna. Two types of antenna were studied whereby one was designed with the conventional $50~\Omega $ environment while the other makes use of the complex value impedance. Parametric study was also performed on both types of antennas so as to investigate the effects it has on the impedance matching requirements. Finally, the prototype was realized through fabrication and measurements were performed at fundamental frequencies and up to 3rdharmonics to show gain at fundamental component and filtering of 2ndand 3rdharmonic.
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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 | 0.002 |
| 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 | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.006 | 0.003 |
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".