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






2. 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.






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






4. IC Chip - Antenna/Inductor - Power Source






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






6. Continuous web - no adhesive






7. UHF and microwave passive tags






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






9. 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






10. 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






11. 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






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






13. 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






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






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






16. 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...






17. The act of writing the tag data by reader






18. 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






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






20. 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






21. 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






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






23. Serves as writable or non-writable data storage






24. 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






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






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






27. 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






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






29. '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






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






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






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






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






34. Optical and RFID hybrid






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






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






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






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






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






40. Inductive coupling and passive backscatter (capacitive coupling)






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






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






43. 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.






44. 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)






45. 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






46. 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






47. Brains of the RFID tag






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






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






50. 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