A miniature LTCC bandpass filter using novel resonators for GPS applications
Bibliographic record
Abstract
We present a novel bandpass filter embedded in a low-temperature co-fired ceramic (LTCC) package designed for small size and robustness. Given the three-dimensional packaging capability of the LTCC substrate, the multilayer resonators are integrated into the module - eliminating the need for their discrete versions. The resonators are comprised of high Q spiral inductors that are combined with four layer parallel plate capacitors. The novel topology of placing the capacitor in the centre and two layers below the plane of the inductor allows for simultaneous area and performance optimization. The complete LTCC bandpass filter module measures only 5 mm times 5.4 mm times 0.8 mm. This version of the design utilizes discrete coupling capacitors to minimize size. The simulation results show the filter to have a centre frequency of 1.525 GHz and a bandwidth of 128 MHz. This is believed to be the smallest implementation of a LTCC bandpass filter for GPS 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) | 0.001 | 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 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".