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. 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






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






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






6. Brains of the RFID tag






7. Time for an associated tag to be read






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






9. 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%)






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






11. 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






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






13. UHF and microwave passive tags






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






15. 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






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






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






19. 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






20. 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






21. 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






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






23. Die-cut web with adhesive - film face






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






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






27. Inductive coupling and passive backscatter (capacitive coupling)






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






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






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






32. 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






33. Continuous web - no adhesive






34. 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






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






36. 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






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






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






39. Smart cards - smart label - etc.






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






42. 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.






43. IC Chip - Antenna/Inductor - Power Source






44. 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...






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






46. The act of writing the tag data by reader






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






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






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






50. Serves as writable or non-writable data storage