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. 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)






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






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. Dead zones that surround protrusions in antenna footprint






5. 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






6. 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






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






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






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






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






12. '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






13. Mount the tiny chip to a strap - Greater handling ability - Possibility to use very small chips - Possibility of higher volume production - Fluidic Self Assembly






14. 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






15. Serves as writable or non-writable data storage






16. 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.






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






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






19. 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...






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






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






22. 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






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






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






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






26. Die-cut web with adhesive - film face






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






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






29. 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






30. 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






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






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






33. Inductive coupling and passive backscatter (capacitive coupling)






34. Optical and RFID hybrid






35. 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.






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






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






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






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






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






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






42. 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






43. 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






44. Brains of the RFID tag






45. UHF and microwave passive tags






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






47. 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






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






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






50. Time for an associated tag to be read