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. 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






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






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






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






5. 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)






6. 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%)






7. 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.






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






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






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






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






12. 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...






13. Dead zones that surround protrusions in antenna footprint






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






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






17. 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






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






19. 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






20. IC Chip - Antenna/Inductor - Power Source






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






22. Brains of the RFID tag






23. 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






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






25. UHF and microwave passive tags






26. 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






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






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






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






30. Serves as writable or non-writable data storage






31. 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






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






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






34. Die-cut web adhesive - paper face






35. 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






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






37. 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






38. Inductive coupling and passive backscatter (capacitive coupling)






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






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






41. Continuous web - no adhesive






42. Inductive coupling and passive backscatter (capacitive coupling)






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






44. 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






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






46. Optical and RFID hybrid






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






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






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






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