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. 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






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






3. 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






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. Inductive coupling and passive backscatter (capacitive coupling)






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






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






8. 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






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






10. Dead zones that surround protrusions in antenna footprint






11. 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






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






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






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






15. Smart cards - smart label - etc.






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






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






18. 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.






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






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






21. 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)






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






23. 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






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






25. 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






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






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






28. Inductive coupling and passive backscatter (capacitive coupling)






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






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






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






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. 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






34. '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






35. 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






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






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






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






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






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






41. UHF and microwave passive tags






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






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






44. IC Chip - Antenna/Inductor - Power Source






45. 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%)






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






48. Continuous web - no adhesive






49. 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






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