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






2. 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






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






4. 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)






5. Continuous web - no adhesive






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






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






8. Serves as writable or non-writable data storage






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






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






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






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






13. 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






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






15. Die-cut web with adhesive - film face






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






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






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






20. '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






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






22. 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






23. 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






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






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






26. Die-cut web adhesive - paper face






27. The act of writing the tag data by reader






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






29. 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.






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






31. 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%)






32. 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






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






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






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






36. 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






37. 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






38. 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






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. 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.






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






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






43. 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






44. Inductive coupling and passive backscatter (capacitive coupling)






45. 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






46. Time for an associated tag to be read






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






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






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






50. Smart cards - smart label - etc.