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






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






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






5. Inductive coupling and passive backscatter (capacitive coupling)






6. Dead zones that surround protrusions in antenna footprint






7. 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






8. 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






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






10. 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






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






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






13. 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.






14. Die-cut web with adhesive - film face






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






16. Serves as writable or non-writable data storage






17. 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%)






18. 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






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






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






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. 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...






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






24. 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






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






26. Optical and RFID hybrid






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






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






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






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






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. Brains of the RFID tag






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






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






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






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






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






38. Smart cards - smart label - etc.






39. UHF and microwave passive tags






40. 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






41. 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






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






43. '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






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






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






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






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






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






49. 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






50. 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