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. 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






2. 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






3. Optical and RFID hybrid






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






5. Serves as writable or non-writable data storage






6. Brains of the RFID tag






7. 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






8. 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






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






10. 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






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






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






13. 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






14. 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






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






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






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






18. 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






19. Continuous web - no adhesive






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






21. The act of writing the tag data by reader






22. IC Chip - Antenna/Inductor - Power Source






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






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






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






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






27. Readability of a tag greatly depends on this and the angle at which the tag is presented to the reader






28. 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






29. '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






30. 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






31. Time for an associated tag to be read






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






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






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






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






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






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






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






39. Smart cards - smart label - etc.






40. 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






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






42. 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






43. Die-cut web adhesive - paper face






44. 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...






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






46. 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%)






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






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






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






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