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. 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.






2. 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






3. 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






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






5. Continuous web - no adhesive






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






7. 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...






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






9. 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






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






11. Brains of the RFID tag






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






13. Die-cut web with adhesive - film face






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






15. Inductive coupling and passive backscatter (capacitive coupling)






16. 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






17. Serves as writable or non-writable data storage






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






19. Class= Functionality - - Class 0 -1 -2 -3 -4 & 5






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






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






22. Die-cut web adhesive - paper face






23. 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






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






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






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






27. 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






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






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






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. 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






32. 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%)






33. IC Chip - Antenna/Inductor - Power Source






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






35. Dead zones that surround protrusions in antenna footprint






36. 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)






37. 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






38. The act of writing the tag data by reader






39. Inductive coupling and passive backscatter (capacitive coupling)






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






41. 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






42. 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.






43. 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






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






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






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






47. Smart cards - smart label - etc.






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






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






50. Time for an associated tag to be read