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






2. 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






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






4. Optical and RFID hybrid






5. 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






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






7. 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%)






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






9. 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






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






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






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






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






14. 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






15. 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






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






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






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. Inductive coupling and passive backscatter (capacitive coupling)






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






21. 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






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






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






24. 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






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






26. Dead zones that surround protrusions in antenna footprint






27. 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.






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






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






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






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






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






33. 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.






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






35. Serves as writable or non-writable data storage






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






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






38. Die-cut web adhesive - paper face






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






40. UHF and microwave passive tags






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






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






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






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






45. 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






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






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






48. 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






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






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