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. 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.






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






3. Smart cards - smart label - etc.






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






5. 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






6. IC Chip - Antenna/Inductor - Power Source






7. Serves as writable or non-writable data storage






8. 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...






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






10. 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






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






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






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






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






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






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






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






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






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






20. 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






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






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






23. 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






24. 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






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






26. Brains of the RFID tag






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






28. Continuous web - no adhesive






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






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






31. 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






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






33. Inductive coupling and passive backscatter (capacitive coupling)






34. 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






35. Time for an associated tag to be read






36. 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






37. 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






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






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






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






41. Die-cut web adhesive - paper face






42. 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)






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. 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






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






46. Die-cut web with adhesive - film face






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






48. 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.






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






50. Dead zones that surround protrusions in antenna footprint