An electronic signal or indicator - Audible alarms - strobes - light stacks - etc.

Die-cut web adhesive - paper face

When two waves (out of phase) impose on each other and the original signal is cancelled. Nulls are created s a result

Broadcasts the reader transmitter's RF signal into its surroundings and receives tag responses on the reader's behalf. Therefore - proper positioning of these (NOT THE READERS) is essential for good read accuracy

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)

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

An electronic signal or indicator - Audible alarms - strobes - light stacks - etc.

Image "burned" into photopolymer layer. All copper removed except where image was burned. Copper antenna goes through additional processes to protect from oxidation