High Dynamic Range Low Power Drive Quadrature Millimeter-Wave Demodulator
Bibliographic record
Abstract
This paper presents a novel demodulator implemented using a broadband six-port circuit and power detectors. Every single detector uses a pair of parallel Schottky diodes and a 90° hybrid coupler to improve the input match. The V-band demodulation results of the proposed six-port interferometric receiver are presented in a wide range of the local oscillator (LO) power. The detected baseband I/Q measurements results are quasi-linear over the considered LO power from 0 to - 40 dB. Moreover, the high-power drive is not required as in the case of conventional diode mixers. Real time Error Vector Magnitude (EVM) measurements of pseudorandom QPSK sequences are performed using a Vector Signal Analyzer. The results are around 5% over a LO power range of 35 dB. This performance demonstrates the capability of the quadrature interferometric mixer in direct demodulation using low LO power. The proposed circuit is well suited for millimeter-wave wireless communication systems and it can replace conventional mixers in efficient and low-cost homodyne receivers.
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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 | 0.001 |
| 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 | 0.001 |
| Research integrity | 0.001 | 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".