| Autor: |
R. L. Comstock, L. J. Varnerin |
| Rok vydání: |
1962 |
| Předmět: |
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| Zdroj: |
PGMTT National Symposium Digest. |
| DOI: |
10.1109/pgmtt.1962.1122402 |
| Popis: |
It is now possible to design a class of low level, milliwatt range ferrimagnetic microwave limiters which exhibit distinctive characteristics and important advantages over previously reported ferrimagnetic limiters. The limiter characteristically consists of a microwave transmission cavity containing as a nonlinear element a large single crystal spherical sample of yttrium iron garnet (YIG) biased to the subsidiary absorption by a dc magnetic field perpendicular to the rf magnetic field. Garnet losses increase with power above the subsidiary absorption threshold and result in a nonlinear decline in cavity Q which limits the output power. Large filling factors are needed for a significant limiting range and the large YIG single crystals now available make this limiter practical. At a given frequency the limiting threshold can be varied with the bias magnetic field, in contrast to gyromagnetic coupler limiters. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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