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. 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.






2. 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






3. Optical and RFID hybrid






4. Most sensitive component of an RFID system - Housed in enclosures for easy mounting. Look like plain - shallow boxes. - Varying placement of this is usually the easiest adjustment while troubleshooting and is vital to achieving a high read rate






5. 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.






6. Brains of the RFID tag






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






8. 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






9. Die-cut web adhesive - paper face






10. 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






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






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






13. Similar to guessing a number made of 1's and 0's by guessing each number one at a time






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






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






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






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






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






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






20. Measurement of power for radiation of antenna used in US






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






22. 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






23. The act of writing the tag data by reader






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






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






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






27. Provides electrical power to other tag elements - Can harvest power from the signal received from the reader - Can have its own internal power source - Active - semi-passive and passive






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






30. 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






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






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






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






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






35. Fixed to meet FCC and other regulatory requirements. The signal can be decreased or attenuated to limit the tag read window or aim it only at tags you want to read






36. Dead zones that surround protrusions in antenna footprint






37. Measurement of power for radiation of antenna used in Europe






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






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






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






41. Time for an associated tag to be read






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






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






44. Inductive coupling and passive backscatter (capacitive coupling)






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






46. Serves as writable or non-writable data storage






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






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






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






50. Die-cut web with adhesive - film face