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






3. 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.






4. 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






5. Inductive coupling and passive backscatter (capacitive coupling)






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






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






8. 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






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






10. Serves as writable or non-writable data storage






11. 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






12. 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






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






14. 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...






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






16. Dead zones that surround protrusions in antenna footprint






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






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






19. 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






20. 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






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






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






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






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






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






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






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






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






29. Brains of the RFID tag






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






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






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






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. Measurement of power for radiation of antenna used in US






35. 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.






36. 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






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






38. 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






39. Die-cut web adhesive - paper face






40. Optical and RFID hybrid






41. '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






42. 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






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






44. UHF and microwave passive tags






45. 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






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






47. Smart cards - smart label - etc.






48. 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






49. Continuous web - no adhesive






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