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






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






3. 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






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






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






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






7. Die-cut web with adhesive - film face






8. 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)






9. UHF and microwave passive tags






10. 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






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






12. 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






13. 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






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






15. Continuous web - no adhesive






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






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






18. 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






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






20. 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






21. Serves as writable or non-writable data storage






22. 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






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






24. 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.






25. 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






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






27. Die-cut web adhesive - paper face






28. 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






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






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






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






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






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






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






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






36. Time for an associated tag to be read






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






38. Smart cards - smart label - etc.






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






40. 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






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






42. 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






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






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






45. Inductive coupling and passive backscatter (capacitive coupling)






46. 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






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






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






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






50. Inductive coupling and passive backscatter (capacitive coupling)







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Can you answer 50 questions in 15 minutes?


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