Wideband LTCC transitions of flip-chip to waveguides/connectors for a highly dense phased array system-in-package at 60 GHz
Bibliographic record
Abstract
This paper presents two types of wideband transitions from a flip-chip interconnect to external v-band rectangular waveguides and surface-mount coaxial connectors, based on LTCC technology. The flip-chip interconnect is directly connected to a multi-level stacked via allowing compact routing of RF signals for a highly dense phased array system-in-package. The signal is guided from striplines into the waveguides using a T-shape launcher and impedance matching is performed by several means including implementing a stub and tapering a near-quarter wavelength embedded waveguide. In the other design, mm-wave signals are directed from a stripline to a surface-mount 1.85 mm v-type connector to provide a compact solution for multiple input/output transceivers. Both types of transitions are fabricated and initial measurement results are presented. Compactness and low loss (0.5 dB) performance along with over 20 % bandwidth from 55 to 67 GHz make the transitions suitable for 60 GHz WiGig applications.
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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) | 0.000 | 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) | 0.001 | 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 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".