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. 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






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






3. 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%)






4. 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






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






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






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






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






9. 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






10. 'Central nervous system' of entire RFID hardware system. Establishing communication with and control of this component is the most important task of any entity which seeks integration






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






12. Die-cut web with adhesive - film face






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






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






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






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






17. 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






18. 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






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






20. 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.






21. 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)






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






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






24. 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






25. 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






26. 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






27. 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






28. 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






29. UHF and microwave passive tags






30. 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.






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






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






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






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






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






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






37. The act of writing the tag data by reader






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






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






40. 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...






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






42. Optical and RFID hybrid






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






44. 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






45. 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






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






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






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






49. 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






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