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. Time for an associated tag to be read






2. IC Chip - Antenna/Inductor - Power Source






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






4. 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






5. 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






6. Type of stationary reader that can print a bar code and create (i.e. write) an RFID tag on a smart label in an integrated operation - Reads the smart label tag that it has just written to validate the write operation. If the validation fails - it rej






7. Serves as writable or non-writable data storage






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






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






10. Die-cut web with adhesive - film face






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






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






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






14. 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






15. 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






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






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






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






19. 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






20. Continuous web - no adhesive






21. 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






22. 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






23. '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






24. Uses a serial communication link to communicate with an application - Reader is physically connected to a computer's serial port using an RS-232 or RS-485 serial connection. Both of these connections have an upper limit on the cable length that can b






25. Inductive coupling and passive backscatter (capacitive coupling)






26. 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%)






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






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






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. These are categorized into Aloha based protocols and tree based






32. 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.






33. Smart cards - smart label - etc.






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






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






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






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






38. Brains of the RFID tag






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






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






41. UHF and microwave passive tags






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






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






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






45. 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






46. 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






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






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






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






50. 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