| 摘要 |
FIELD: physics, radio. ^ SUBSTANCE: invention concerns field of radio technics, in particular to methods for the security alarm system and to the methods of the control over travel of objects. Application of the given method reduces influence on the data unit of reflecting properties of the surfaces which are adjoining or being in a sensitive band. The technical effect is reached due to that linearly polarised transmitting each other linearly polarised transmitting and receiving scanners of the radio data unit guided towards each other have in space in such a manner that vectors of polarisation of an electromagnetic field of scanners coincide in a direction and are shaped at angles which are distinct from 0° and 90° to catopters. As a result in the net signal on an exit of a receiving antenna the share of the reflected wave decreases and becomes underload at approach to 45° angles between the vector of polarisation of antennas and the catopter. ^ EFFECT: reduction of influence of the reflected signals at formation of a sensitive band along surfaces that leads to decrease in probability of false alarms of the data units using the offered method. ^ 2 cl, 4 dwg |
