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. 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






2. 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.






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






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






5. Optical and RFID hybrid






6. 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






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






8. Dead zones that surround protrusions in antenna footprint






9. IC Chip - Antenna/Inductor - Power Source






10. 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.






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






12. 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%)






13. Serves as writable or non-writable data storage






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






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






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






17. 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






18. 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






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






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






21. Die-cut web with adhesive - film face






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






23. Time for an associated tag to be read






24. 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






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






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






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






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






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






30. 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






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






32. 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...






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






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






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






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






37. 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






38. 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






39. Die-cut web adhesive - paper face






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






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






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






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






44. 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)






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






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






47. UHF and microwave passive tags






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






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






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