Realizing non-Foster reactances using negative-group-delay networks and applications to antennas
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Non-Foster reactive elements such as negative capacitors and negative inductors hold promise for a number of important applications such as broadband small antennas (beyond the Chu limit), broadband matching networks (beyond the Bode-Fano limit) and squint-free series-fed and leaky-wave antennas. Traditionally, negative capacitors and inductors have been implemented using negative-impedance converters (NICs) and negative-impedance inverters (NIIs). However, these NIC and NII circuits are prone to instabilities and excessive noise. In this article, we highlight a new perspective in realizing non-Foster reactive elements using negative-group-delay (NGD) networks. The underlying NGD networks are completely passive and thus stable. However, NGD are associated with some kind of loss (resistive or reflective) which can be compensated using amplifiers. The stable operation of these elements can lead to interesting antenna applications discussed in this paper.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 | 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) | 0.000 | 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 it