Waveguide Power Combiner Using E-Plane Signal Transition Structure and Resistive Septum for W-Band High Power Amplifier Applications
Bibliographic record
Abstract
In this study, a wideband, low-loss waveguide power combiner is designed and manufactured using a waveguide-to-microstrip signal transition feed and resistive septum, which can be applied to waveguides in the W-band. The waveguide power combiner has a T-junction structure and is implemented by locating the transition feed at a length of λ/4, where the E-field is maximized, and combining the resistive septum manufactured by the NiCr thin film process. The performance is verified using a passive integrated circuit IC in the form of a microstrip line matched with 50 Ω to the manufactured combiner, and the combined characteristics according to the presence or absence of a resistive septum are confirmed by mounting a power amplifier PA. The isolation of the combiner with the resistive septum is −15 dB compared with the 9 dB without a resistive septum, which improves the simulation results. The power combining module manufactured using the passive IC exhibits a low insertion loss of approximately 0.75 dB (@ 78 GHz) after the output stage with the transition structure and including the resistive septum structure. As a result of constructing a power combining module with a waveguide structure using an MMIC with an amplification gain of approximately 20 dB and an output performance of 26 dBm, in the absence of a resistive septum, a low-power-combining characteristic of approximately 8 dB gain and 14 dBm is achieved. When a resistive septum is applied, it exhibits a stable amplification gain of approximately 18 dB and output performance of 28.4 dBm (2.4 dB combined gain).
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How this classification was reachedexpand
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 | 0.001 | 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) | 0.000 | 0.000 |
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 teacher head, 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".