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






2. Dead zones that surround protrusions in antenna footprint






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






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






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






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






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






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






9. 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.






10. 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






11. The act of writing the tag data by reader






12. 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






13. UHF and microwave passive tags






14. 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.






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






16. 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






17. Inductive coupling and passive backscatter (capacitive coupling)






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






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






20. 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






21. 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






22. '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






23. 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






24. 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






25. The 3D energy field generated by the antenna (also called reading area)






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






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






28. Frequencies between 30-300 KHz - Generally use passive tags - have low data-transfer rates from the tag to the reader - and are especially good if the operating environment contains metals - liquids - dirt - snow - or mud. Active tags also available






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






30. 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






31. Inductive coupling and passive backscatter (capacitive coupling)






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






33. 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






34. 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






35. 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






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






37. 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






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






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






40. 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%)






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






42. 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






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






44. 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






45. Die-cut web with adhesive - film face






46. Brains of the RFID tag






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






48. The time during which a reader can emit RF energy to read tags






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






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







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