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






2. 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






3. Die-cut web with adhesive - film face






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






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






6. 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






7. 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






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






9. IC Chip - Antenna/Inductor - Power Source






10. Brains of the RFID tag






11. 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






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






13. 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






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






15. Time for an associated tag to be read






16. 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






17. 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






18. 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






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






20. 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






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






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






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






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






25. Inductive coupling and passive backscatter (capacitive coupling)






26. Serves as writable or non-writable data storage






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






28. UHF and microwave passive tags






29. 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...






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






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






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






33. 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






34. 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






35. 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






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. Process of creating a tag and uniquely associating it with an object






38. 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






39. 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






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






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






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






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






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






45. 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.






46. 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






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






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






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






50. 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)