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. 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






2. 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%)






3. 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






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






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






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






7. 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






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






9. 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






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






11. 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






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






13. Die-cut web with adhesive - film face






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






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






16. Inductive coupling and passive backscatter (capacitive coupling)






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






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






19. IC Chip - Antenna/Inductor - Power Source






20. Optical and RFID hybrid






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






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






23. 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






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






25. Continuous web - no adhesive






26. Smart cards - smart label - etc.






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






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






29. 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






30. 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






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






32. Serves as writable or non-writable data storage






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






34. '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






35. Die-cut web adhesive - paper face






36. 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






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






38. 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)






39. 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.






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






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






42. 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






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






44. 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






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






46. 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






47. UHF and microwave passive tags






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






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






50. 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