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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. Measurement of power for radiation of antenna used in US






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. 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






4. Dead zones that surround protrusions in antenna footprint






5. 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%)






6. 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.






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






8. Serves as writable or non-writable data storage






9. The act of writing the tag data by reader






10. 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






11. 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






12. Die-cut web adhesive - paper face






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






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






15. 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






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






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






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






19. Inductive coupling and passive backscatter (capacitive coupling)






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






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






22. 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)






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






24. '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






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






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






27. 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






28. 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






29. 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






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






31. 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






32. Continuous web - no adhesive






33. 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






34. Brains of the RFID tag






35. Die-cut web with adhesive - film face






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






37. 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






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






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






40. Inductive coupling and passive backscatter (capacitive coupling)






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






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






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






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






45. 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.






46. Smart cards - smart label - etc.






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






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






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






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







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