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. 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






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






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






4. Die-cut web adhesive - paper face






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






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






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






8. Optical and RFID hybrid






9. 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






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






11. 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






12. The act of writing the tag data by reader






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






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






15. Time for an associated tag to be read






16. Brains of the RFID tag






17. Die-cut web with adhesive - film face






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






19. 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






20. 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...






21. 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






22. 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






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






24. UHF and microwave passive tags






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






26. 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






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






28. IC Chip - Antenna/Inductor - Power Source






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






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






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






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






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






35. 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






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






37. 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






38. 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






39. Dead zones that surround protrusions in antenna footprint






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






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






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






43. Inductive coupling and passive backscatter (capacitive coupling)






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






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






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






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






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






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






50. Serves as writable or non-writable data storage