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






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






3. '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






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






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






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






8. 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






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






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






11. 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)






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






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






14. 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.






15. 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






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






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






18. Continuous web - no adhesive






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






20. 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






21. Die-cut web adhesive - paper face






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






23. Inductive coupling and passive backscatter (capacitive coupling)






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






25. Optical and RFID hybrid






26. Brains of the RFID tag






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






28. 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






29. Dead zones that surround protrusions in antenna footprint






30. Inductive coupling and passive backscatter (capacitive coupling)






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






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






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






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






35. 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






36. 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.






37. Time for an associated tag to be read






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






39. 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






40. Smart cards - smart label - etc.






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






42. 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






43. 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






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






45. 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






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






47. 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






48. Die-cut web with adhesive - film face






49. 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






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