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






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






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






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






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






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






7. 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






8. 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%)






9. 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)






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






11. 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






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






13. 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






14. Die-cut web with adhesive - film face






15. Continuous web - no adhesive






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






17. 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






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






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






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






21. 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






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






23. Serves as writable or non-writable data storage






24. Dead zones that surround protrusions in antenna footprint






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






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






27. Time for an associated tag to be read






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






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






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






31. IC Chip - Antenna/Inductor - Power Source






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






33. Optical and RFID hybrid






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






35. 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






36. '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






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






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






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






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






41. Inductive coupling and passive backscatter (capacitive coupling)






42. 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






43. 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






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






45. Die-cut web adhesive - paper face






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






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






48. 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






49. 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.






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