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. Continuous web - no adhesive






2. 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






3. 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






4. 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






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






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






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






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






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






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






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






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






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






14. IC Chip - Antenna/Inductor - Power Source






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






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






17. 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






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






19. 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






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






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






22. Inductive coupling and passive backscatter (capacitive coupling)






23. Brains of the RFID tag






24. 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...






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. Time for an associated tag to be read






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






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






29. 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






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. Receives analog signals from the tag via the reader antenna






32. 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






33. 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






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






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






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






37. 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






38. Inductive coupling and passive backscatter (capacitive coupling)






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






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






41. 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






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






43. The act of writing the tag data by reader






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






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






46. 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






47. 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






48. 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






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. Die-cut web adhesive - paper face