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. 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






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






3. 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






4. 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)






5. Time for an associated tag to be read






6. Inductive coupling and passive backscatter (capacitive coupling)






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






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






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






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






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






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






13. 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






14. Also called a fixed reader - Mounted on a wall - portal - or some suitable structure in the read zone. Readers not generally very tolerant of harsh environmental conditions - therefore if installed outdoors or on moving objects - take care to ruggedi






15. 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






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






17. Dead zones that surround protrusions in antenna footprint






18. Brains of the RFID tag






19. The act of writing the tag data by reader






20. 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






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






22. 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






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






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






25. Proximity systems (low range -mm) medium range (cm) and long range (m)






26. Serves as writable or non-writable data storage






27. Smart cards - smart label - etc.






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






29. Optical and RFID hybrid






30. 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.






31. UHF and microwave passive tags






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






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






34. Inductive coupling and passive backscatter (capacitive coupling)






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






36. Die-cut web with adhesive - film face






37. 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.






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






39. 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






40. Die-cut web adhesive - paper face






41. IC Chip - Antenna/Inductor - Power Source






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






43. To disassociate the tag from a tagged object and optionally destroy it






44. RF energy radiates from antenna in circular fashion - Slightly reduced range - Provides greater tolerance to tags in various orientation and bounce off of and bypass obstructions - 2 E-field components that are equal in magnitude - 90 degrees out of






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






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






48. 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






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