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. 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.






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






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






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






5. Smart cards - smart label - etc.






6. Optical and RFID hybrid






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






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






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






10. 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






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






12. 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






13. Serves as writable or non-writable data storage






14. 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






15. 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






16. 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






17. Time for an associated tag to be read






18. Die-cut web adhesive - paper face






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






20. Die-cut web with adhesive - film face






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






22. The act of writing the tag data by reader






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






24. 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






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






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






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






28. 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...






29. 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






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






31. Dead zones that surround protrusions in antenna footprint






32. 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






33. Inductive coupling and passive backscatter (capacitive coupling)






34. 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






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






36. 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






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






38. 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






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






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






41. '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






42. 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






43. UHF and microwave passive tags






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






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






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






47. 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)






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






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






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