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. Optical and RFID hybrid






2. 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






3. 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.






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






5. Continuous web - no adhesive






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






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






8. Die-cut web with adhesive - film face






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






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






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






12. 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






13. 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






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






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






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






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






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






19. Serves as writable or non-writable data storage






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






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






22. 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






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






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






25. Inductive coupling and passive backscatter (capacitive coupling)






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






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






28. 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






29. 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






30. 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






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






33. 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...






34. 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%)






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






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






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






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






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






41. 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






42. 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






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






44. Smart cards - smart label - etc.






45. 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)






46. UHF and microwave passive tags






47. 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






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. Brains of the RFID tag






50. Uses a serial communication link to communicate with an application - Reader is physically connected to a computer's serial port using an RS-232 or RS-485 serial connection. Both of these connections have an upper limit on the cable length that can b