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






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






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. 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






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






6. 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






7. 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.






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






9. 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






10. 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






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






12. 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






13. Time for an associated tag to be read






14. 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






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






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






17. 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






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






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






21. Die-cut web adhesive - paper face






22. 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






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






24. 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






25. Inductive coupling and passive backscatter (capacitive coupling)






26. Die-cut web with adhesive - film face






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






28. 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






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






30. UHF and microwave passive tags






31. The act of writing the tag data by reader






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






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






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






35. 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.






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






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






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






39. 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






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






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






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






43. Inductive coupling and passive backscatter (capacitive coupling)






44. Serves as writable or non-writable data storage






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






46. IC Chip - Antenna/Inductor - Power Source






47. 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






48. Process of creating a tag and uniquely associating it with an object






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






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