Correct Answer: Linear Polarized Antenna
Explanation:
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A mechanical device for controlling or moving objects - A programmable logic controller (PLC) - robot arm - mechanical arm - etc.
Readability of a tag greatly depends on this and the angle at which the tag is presented to the reader
The orientation of the transmitted electromagnetic field or the direction of oscillation of electromagnetically emitted waves
Image "burned" into photopolymer layer. All copper removed except where image was burned. Copper antenna goes through additional processes to protect from oxidation
An electronic signal or indicator - Audible alarms - strobes - light stacks - etc.
When two waves (in phase) impose on each other and enhance the original signal and give rise to protrusions
Frequencies between 30-300 KHz - Generally use passive tags - have low data-transfer rates from the tag to the reader - and are especially good if the operating environment contains metals - liquids - dirt - snow - or mud. Active tags also available
Reader that can operate in different frequencies or can use different tag-to-reader communication protocols (generally stationary)
RF energy radiates from antenna in linear fashion - Provide longest range - Sensitive to the orientation of tag - Has single E-field component - Can have a narrow beam pattern - Best for application with known tag orientation
This type of antenna is largely unaffected by tag orientation - Preferred in system that uses high UHF or microwave frequencies in an operating environment where there is a high degree of RF reflectance (due to presence of metals and so forth)