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 (in phase) impose on each other and enhance the original signal and give rise to protrusions






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. '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






4. 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






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






6. 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.






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






8. Dead zones that surround protrusions in antenna footprint






9. 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






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






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






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






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






14. Serves as writable or non-writable data storage






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






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






17. 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...






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






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






20. One of the most versatile actuators. Widely used in manufacturing plants. They enable a variety of actions to be performed (such as monitoring and controlling a product packaging line - or applying a predetermined amount of torque to nuts in a mechan






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






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






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






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






25. UHF and microwave passive tags






26. 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






27. Time for an associated tag to be read






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






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






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






31. 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)






32. Brains of the RFID tag






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






34. Inductive coupling and passive backscatter (capacitive coupling)






35. 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






36. 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






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






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






39. 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






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






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






42. 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






43. 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






44. Optical and RFID hybrid






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






46. IC Chip - Antenna/Inductor - Power Source






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






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. These are categorized into Aloha based protocols and tree based






50. 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