A 5–18-GHz Reconfigurable Quadrature Receiver With Enhanced I–Q Isolation and 100–500-MHz Baseband Bandwidth
Bibliographic record
Abstract
A wideband reconfigurable quadrature receiver with the range of 5–18-GHz frequency coverage and 100–500-MHz analog baseband bandwidth is proposed in this article. The low-noise front end utilizes a capacitor assisting triple-winding transformer (CTTF) to expand bandwidth and suppress noise. An injection-locked oscillator driven by a delay-locked loop is used to generate the quadrature clocks without using the divider and the associated high-frequency clock. The hybrid baseband filter consisting of passive RLC and active-RC biquad simultaneously achieves high linearity and flexible gain/bandwidth adjustments. The analog baseband circuitry employs a feedforward compensated transconductance amplifier that greatly relaxes the power-bandwidth trade-off. To mitigate the impact of complex and frequency-dependent quadrature error (I–Q mismatch) arising from I-to-Q clock overlap, the receiver applies separate RF-<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$G_{m}$ </tex-math></inline-formula> to drive I and Q passive mixers. Fabricated in a 28-nm CMOS process, the proposed receiver exhibits a noise figure of 2.1–5.4-dB and 30–72-dB adjustable conversion gain, >20-dBm in-band OIP3, >16-dBm out-of-band OIP3 with a total power consumption of 104–199-mW at 1-V supply.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".