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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. 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






2. 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






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






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






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






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






7. Smart cards - smart label - etc.






8. 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






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






10. 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






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






13. 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






14. 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






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






16. Optical and RFID hybrid






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






18. Dead zones that surround protrusions in antenna footprint






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






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






21. 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






22. 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






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






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






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






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






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






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






29. Die-cut web adhesive - paper face






30. IC Chip - Antenna/Inductor - Power Source






31. 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%)






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






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






34. 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






35. Brains of the RFID tag






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






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






38. The act of writing the tag data by reader






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






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






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






42. 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






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






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






45. 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






46. 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






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






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






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






50. Inductive coupling and passive backscatter (capacitive coupling)







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