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






2. 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






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






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






6. 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






7. 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






8. Die-cut web adhesive - paper face






9. Smart cards - smart label - etc.






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






11. 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






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






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






14. 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






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






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






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






18. 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)






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






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






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






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






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






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






25. 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...






26. 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






27. 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%)






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






29. 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






30. UHF and microwave passive tags






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






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






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






34. Type of stationary reader that can print a bar code and create (i.e. write) an RFID tag on a smart label in an integrated operation - Reads the smart label tag that it has just written to validate the write operation. If the validation fails - it rej






35. 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.






36. Inductive coupling and passive backscatter (capacitive coupling)






37. Die-cut web with adhesive - film face






38. 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






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






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






41. 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






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






43. 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






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






45. Brains of the RFID tag






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






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






48. 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






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






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







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