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. 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.






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






3. Dead zones that surround protrusions in antenna footprint






4. 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






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






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






7. 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






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






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






10. Die-cut web adhesive - paper face






11. UHF and microwave passive tags






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






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






14. Time for an associated tag to be read






15. Inductive coupling and passive backscatter (capacitive coupling)






16. IC Chip - Antenna/Inductor - Power Source






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






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






19. 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






20. 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






21. Optical and RFID hybrid






22. 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.






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






24. 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%)






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






26. Inductive coupling and passive backscatter (capacitive coupling)






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






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






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






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. Continuous web - no adhesive






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






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






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






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






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






37. 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






38. 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






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






40. '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






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






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






43. 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






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






45. Die-cut web with adhesive - film face






46. 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...






47. 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






48. 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






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






50. The act of writing the tag data by reader