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






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






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






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






6. Inductive coupling and passive backscatter (capacitive coupling)






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






8. 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.






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






10. UHF and microwave passive tags






11. 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






12. Die-cut web adhesive - paper face






13. 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






14. Die-cut web with adhesive - film face






15. 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.






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






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






18. Inductive coupling and passive backscatter (capacitive coupling)






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






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. 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






22. 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...






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






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






25. IC Chip - Antenna/Inductor - Power Source






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






27. Serves as writable or non-writable data storage






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






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






30. Neighboring readers interrogate a tag simultaneously (can be easily solved because they can detect this and communicate to each other)






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






32. The act of writing the tag data by reader






33. 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






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






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






36. Time for an associated tag to be read






37. Continuous web - no adhesive






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






39. 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






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






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






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






43. 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






44. 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






45. Dead zones that surround protrusions in antenna footprint






46. Optical and RFID hybrid






47. 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)






48. 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






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






50. 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






Can you answer 50 questions in 15 minutes?



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