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






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






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






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






5. Die-cut web with adhesive - film face






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






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






8. 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






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






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






11. 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






12. 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






13. Time for an associated tag to be read






14. Inductive coupling and passive backscatter (capacitive coupling)






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






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






17. Die-cut web adhesive - paper face






18. 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






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






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






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






22. The act of writing the tag data by reader






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






24. 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






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






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






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






28. 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.






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






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






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






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






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






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






35. Dead zones that surround protrusions in antenna footprint






36. Optical and RFID hybrid






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






39. '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






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






41. Continuous web - no adhesive






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






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






44. 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






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






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






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






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






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