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






2. 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






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






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






5. Reader communicates to a tag through reader's antennas - a separate device that is physically attached to a reader - at one of its antenna ports - by means of cable. Called this because it creates an electromagnetic field to couple with the tag.






6. Brains of the RFID tag






7. 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






8. Die-cut web adhesive - paper face






9. Inductive coupling and passive backscatter (capacitive coupling)






10. Silicon chip is picked up by robotized arm using precise vacuum nozzle. Chip is flipped so that its electrical contacts point face down. Chip is aligned with the antenna and pressure and heat is applied.






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






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






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






14. Receives signal from reader and radiates a response back to the reader - LF or HF: induction coil - UHF or Microwave Frequency: printed antennas






15. Time for an associated tag to be read






16. Continuous web - no adhesive






17. Can automatically turn on/off reader based on some external event detected. Can be used to provide some kind of input trigger to a reader






18. '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






19. Dead zones that surround protrusions in antenna footprint






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






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






22. controls the internal functions under the command of the processor






23. Class= Functionality - - Class 0 -1 -2 -3 -4 & 5






24. The time during which a reader can emit RF energy to read tags






25. 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






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






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






28. 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






29. 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






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






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






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






33. UHF and microwave passive tags






34. 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






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






36. 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%)






37. 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






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






39. 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






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






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






42. Why ___________ is better: Cost of printed antennas varies between 24-44% of copper antennas - Printed antennas show 93-96% radiation efficiency compared to copper antennas...






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






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






45. Receives analog signals from the tag via the reader antenna






46. Die used to "stamp" out the shape of antenna. Take up roller rolls the unused material into waste roll.






47. Reader that can operate in different frequencies or can use different tag-to-reader communication protocols (generally stationary)






48. Mount the tiny chip to a strap - Greater handling ability - Possibility to use very small chips - Possibility of higher volume production - Fluidic Self Assembly






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






50. More than one tag tries to respond to a reader at the same time.