Arkady Migdal
From Wikipedia, the free encyclopedia
Arkady Beynusovich Migdal (11 March 1911 - 9 February 1991) was a Soviet physicist, member of the USSR Academy of Sciences. He was a co-author of the Landau-Pomeranchuk-Migdal effect.
[edit] Books
- Arkadiĭ Beĭnusovich Migdal and Vladimir Pavlovich Kraĭnov (1968). Approximation methods of quantum mechanics, translation from Russian by Irene Verona Schensted (in English), NEO Press.
- Migdal, A.B. (1977). Qualitative methods in quantum theory. ISBN 0805370641.
 |
This article about a physicist is a stub. You can help Wikipedia by expanding it. |
Directivity is also defined for directional couplers and similiar devices for RF and Microwave measurements. It is the properof the device couple power in one direction while rejecting in other direction. Higher the rejection, higher the directivity. For example in a directional coupler if the directivity of a measuring port is 40 dB, it means the power coupled in this port from desired direction will be 40 dB higher than the undesired power coupled from other direction.
