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. Standards = EPC global & ISO 18000 - Different Organizations






2. Inductive coupling and passive backscatter (capacitive coupling)






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






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






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






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






7. 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






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






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






10. IC Chip - Antenna/Inductor - Power Source






11. Optical and RFID hybrid






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






13. 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)






14. 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






15. The act of writing the tag data by reader






16. 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.






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






18. 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






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






20. 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.






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






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






23. 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






24. 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






25. 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






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






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






28. Time for an associated tag to be read






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






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






31. Brains of the RFID tag






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






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






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






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






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






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






38. 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






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






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






41. 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






42. 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...






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. Continuous web - no adhesive






45. Smart cards - smart label - etc.






46. Die-cut web adhesive - paper face






47. 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






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






49. 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






50. UHF and microwave passive tags