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. Die-cut web with adhesive - film face






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. Most sensitive component of an RFID system - Housed in enclosures for easy mounting. Look like plain - shallow boxes. - Varying placement of this is usually the easiest adjustment while troubleshooting and is vital to achieving a high read rate






4. Inductive coupling and passive backscatter (capacitive coupling)






5. 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






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






7. 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






8. Optical and RFID hybrid






9. 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






10. 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...






11. Die-cut web adhesive - paper face






12. Every time a tag is read - it is saved to this






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






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






15. 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






16. Time for an associated tag to be read






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






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






19. 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






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






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






22. Serves as writable or non-writable data storage






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






24. 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






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






26. 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






27. Dead zones that surround protrusions in antenna footprint






28. 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%)






29. 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






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






31. 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.






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






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






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






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






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. Inductive coupling and passive backscatter (capacitive coupling)






38. 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






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






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






41. These are categorized into Aloha based protocols and tree based






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. Continuous web - no adhesive






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






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






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






47. IC Chip - Antenna/Inductor - Power Source






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






49. 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






50. UHF and microwave passive tags