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. Smart cards - smart label - etc.






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






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






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






5. Inductive coupling and passive backscatter (capacitive coupling)






6. More than one tag tries to respond to a reader at the same time.






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






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






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






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






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






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






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






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






16. 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






17. Dead zones that surround protrusions in antenna footprint






18. IC Chip - Antenna/Inductor - Power Source






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






20. Optical and RFID hybrid






21. 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






22. 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.






23. 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






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






25. 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%)






26. 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






27. Also called a fixed reader - Mounted on a wall - portal - or some suitable structure in the read zone. Readers not generally very tolerant of harsh environmental conditions - therefore if installed outdoors or on moving objects - take care to ruggedi






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






29. 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






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






31. 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






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






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






34. Brains of the RFID tag






35. 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






36. UHF and microwave passive tags






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






38. 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






39. 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






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






41. Die-cut web adhesive - paper face






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






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






44. 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






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






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






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






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






49. Inductive coupling and passive backscatter (capacitive coupling)






50. 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...