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. controls the internal functions under the command of the processor






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






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






4. Dead zones that surround protrusions in antenna footprint






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






6. Optical and RFID hybrid






7. 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






8. Inductive coupling and passive backscatter (capacitive coupling)






9. 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






10. IC Chip - Antenna/Inductor - Power Source






11. 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%)






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






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. These are categorized into Aloha based protocols and tree based






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






16. 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






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






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






19. 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)






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






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






22. Smart cards - smart label - etc.






23. 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






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






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






26. Die-cut web with adhesive - film face






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






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






29. Broadcasts the reader transmitter's RF signal into its surroundings and receives tag responses on the reader's behalf. Therefore - proper positioning of these (NOT THE READERS) is essential for good read accuracy






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






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






32. Continuous web - no adhesive






33. 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






34. 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






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






36. Die-cut web adhesive - paper face






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






38. 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...






39. The act of writing the tag data by reader






40. 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






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






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






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






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






45. Time for an associated tag to be read






46. 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






47. 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






48. 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






49. 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






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