HIGH SENSITIVITY 0.5 TO 19.5 GHZ RECEIVER WITH 1.1-GHZ INSTANTANEOUS BANDWIDTH
Bibliographic record
Abstract
Описывается широкополосный высокочувствительный свервысокочастотный приемник, способный принимать сигналы в диапазоне 0.5÷19 ГГц с мгновенной полосой 1.1 ГГц. Приемник имеет коэффициент шума не превышающий 10 дБ и точку интермодуляции 3-го порядка по входу, достигающую +10 дБм. Приемник отличается также малым уровнем внутренних паразитных сигналов и крайне низкими значениями внутренних фазовых шумов. Приведены и обсуждаются основные принципы построения приемника. Ключевые слова: приемник, широкополосный, малошумящий, СВЧ Статья поступила в редакцию 09.09.2014 Radio phys. radio astron. 2014, 19(4): 375-380 СПИСОК ЛИТЕРАТУРЫ 1. Neri F. Introduction to Electronic Defense Systems, 2nd ed. – Artech House, 2006. 2. Tsui J. Microwave Receivers With Electronic Warfare Applications. Corrected Reprint. – Raleigh, NC: SciTech Publishing, 2005. 3. Multi-Carrier and Spread Spectrum Systems: From OFDM and MC-CDMA to LTE and WiMAX, 2nd Ed. – John Wiley & Sons Inc., 2008. 4. Goldsmith A. Wireless Communications. – New York: Cambridge University Press, 2005. 5. Rembovsky A., Ashikhmin A., Kozmin V., and Smolskiy S. M. Radio Monitoring. – Dordrecht, Heidelberg, London, New York: Springer, 2009. 6. Simon M., Omura J., Scholtz R., and Levitt B. Spread Spectrum Communications Handbook. – New York, Chicago, San Francisco, Lisbon, London, Madrid, Mexico City, Milan, New Delhi, San Juan, Seoul, Singapore, Sydney, Toronto: McGraw-Hill Professional, 2001. 7. Wicks M. C., Mokole E. L., Blunt S. D., Schneible R. S., and Amuso V. J. Principles of Waveform Diversity and Design. – Raleigh, NC: Sci Tech Publishing, 2011. 8. Bezvesilniy O. O., Vavriv D. M., Vinogradov V. V., Volkov V. A., and Kozhin R. V. Synthetic Aperture Radar Systems for Light-Weight Aircrafts // Uspehi sovremennoy radioelektroniki. – 2012. – No. 12. – P. 53–61, (in Russian). 9. Rudersdorfer R. Radio Receiver Technology: Principles, Architectures and Applications. – John Wiley & Sons Inc., 2014. 10. Drentea C. Modern Communications Receiver Design and Technology. – Artech House, 2010. 11. Marki F. and Marki C. T3 Mixer Primer, App. Note. – Morgan Hill, CA: Marki Microwave. 12. Teppati V., Ferrero A., and Sayed M. , editors, Modern RF and Microwave Measurement Techniques. – New York: Cambridge University Press, 2013.
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.
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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 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) | 0.013 | 0.010 |
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".