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






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






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






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. 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






6. Dead zones that surround protrusions in antenna footprint






7. Time for an associated tag to be read






8. 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






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






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






11. 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






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






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






14. 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






15. 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...






16. Serves as writable or non-writable data storage






17. Brains of the RFID tag






18. 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






19. 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






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






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






22. 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






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






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






25. Die-cut web adhesive - paper face






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






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






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






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. 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






31. 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






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






33. '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






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






35. 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






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






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






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






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






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






41. Continuous web - no adhesive






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






43. Inductive coupling and passive backscatter (capacitive coupling)






44. 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






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






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






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






48. 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






49. 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






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