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






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






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






4. 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






5. 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...






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






7. '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






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






9. 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






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






11. UHF and microwave passive tags






12. 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






13. Optical and RFID hybrid






14. 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






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






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






17. 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)






18. 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.






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






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






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






22. 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






23. 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






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






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






26. changes signal received from reader to include data that will be transmitted back to the reader






27. 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






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






29. 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






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






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






32. 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






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






34. Die-cut web adhesive - paper face






35. Dead zones that surround protrusions in antenna footprint






36. 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






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






38. Serves as writable or non-writable data storage






39. 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.






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






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






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






43. Inductive coupling and passive backscatter (capacitive coupling)






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






45. 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






46. 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






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






48. 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






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






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