Test your basic knowledge |

RFID Technology

Subject : it-skills
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. An electronic signal or indicator - Audible alarms - strobes - light stacks - etc.






2. When two waves (in phase) impose on each other and enhance the original signal and give rise to protrusions






3. Divides time into discrete time intervals (slots) . A packet can only be transmitted at the beginning of a slot - reduces the collision duration.






4. Tags collide completely or not at all (Theoretically proven maximum utilization= 36.8%)






5. Brains of the RFID tag






6. Ranges from 300 MHz to 1GHz - Passive system operates at 915 MHz in the US and at 868 MHz in Europe - Active system operates at 315 MHz and 433 MHz - Can use both active and passive tags - Has a fast data-transfer rate between tag and reader - but pe






7. Reader receives and executes commands from an application running on a host machine from a user using a vendor-supplied client to communicate with the reader. After reader fully executes the current command - it waits for the next. Reader can execute






8. Responsible for implementing the reader protocol to communicate with compatible tags






9. A mechanical device for controlling or moving objects - A programmable logic controller (PLC) - robot arm - mechanical arm - etc.






10. Dead zones that surround protrusions in antenna footprint






11. Time for an associated tag to be read






12. Open image in meshed screens. Conductive ink "squeezed" thru open mesh.






13. Used to transmit AC power and the clock cycle via its antennas to the tags in its read zone






14. Ranges upward from 1 GHz - Typically operates at either 2.45 GHz or 5.8 GHz - Can use both semi-active and passive tags - Has FASTEST data-transfer rate between tag and reader - Performs poorly in presence of metals and liquids - Antenna of a passive






15. Process of creating a tag and uniquely associating it with an object






16. Interprets the signal received from reader and controls memory storage and retrieval






17. IC Chip - Antenna/Inductor - Power Source






18. Generation= Timeline of Introduction - Gen 1 & 2 - Gen 2 protocol backward compatible






19. Every time a tag is read - it is saved to this






20. Developed in the 1970s for a radio packet network at the University of Hawaii (hence the name) - 4 tags and 1 reader - Allows tags to collide partially (Theoretically proven maximum utilization=18.4%)






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






22. Readability of a tag greatly depends on this and the angle at which the tag is presented to the reader






23. changes signal received from reader to include data that will be transmitted back to the reader






24. In this mode - reader continuously reads tags in its read zone






25. The reflection of reader antenna signals on RF-opaque causes this






26. One of the most versatile actuators. Widely used in manufacturing plants. They enable a variety of actions to be performed (such as monitoring and controlling a product packaging line - or applying a predetermined amount of torque to nuts in a mechan






27. Low Frequency(LF) - High Frequency(HF) - Ultra high frequency (UHF) and Microwave frequency






28. Pattern(Footprint) - Power/Attenuation - and Polarization






29. 'Central nervous system' of entire RFID hardware system. Establishing communication with and control of this component is the most important task of any entity which seeks integration






30. The act of writing the tag data by reader






31. Reader transmits a continuous-wave RF signal into the reading environment






32. These are categorized into Aloha based protocols and tree based






33. 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






34. Die-cut web with adhesive - film face






35. Standards = EPC global & ISO 18000 - Different Organizations






36. The sender of this found out whether the transmission was successful by listening to the broadcast. If there was a collision - the sender transmitted after a random waiting period. The tags periodically send data packets with random quiet periods and






37. Continuous web - no adhesive






38. Used for storing data such as the reader configuration parameters and a list of tag reads






39. LF and HF passive tags - Current flowing through a conductor generates a magnetic field around the conductor and vice versa - Readers antenna uses current to generate magnetic field - Tag's antenna when exposed to the magnetic field generates the cur






40. Determines the read zone of a reader - Also called an antenna pattern - 3D region shaped somewhat like an ellipsoid or a balloon projecting out the front of the antenna. Never uniformly shaped like an ellipsoid but almost always contains deformities






41. The orientation of the transmitted electromagnetic field or the direction of oscillation of electromagnetically emitted waves






42. Neighboring readers interrogate a tag simultaneously (can be easily solved because they can detect this and communicate to each other)






43. Smart cards - smart label - etc.






44. Serves as writable or non-writable data storage






45. UHF and microwave passive tags






46. Can reduce power by placing this device in the transmission line. As a result - the antennas signal is reduced and the read range diminished. Proves useful in situations where the read zone needs to be constrained as a part of system requirements so






47. Inductive coupling and passive backscatter (capacitive coupling)






48. In this this antenna type - the RF waves emanate in a linear pattern from the antenna. Waves have only one energy field






49. Also called an 'interrogator' - A device that can read from and write data to compatible RFID tags - Also doubles up as a writer






50. The 3D energy field generated by the antenna (also called reading area)