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. 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






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






3. 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






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






5. 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.






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






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






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






9. 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






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






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






12. UHF and microwave passive tags






13. 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...






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






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






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






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






18. 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






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






20. Time for an associated tag to be read






21. 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






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






24. Serves as writable or non-writable data storage






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






26. 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






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






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






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. 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%)






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






32. Inductive coupling and passive backscatter (capacitive coupling)






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






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






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






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






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






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






39. 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






40. 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






41. 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






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






43. Die-cut web with adhesive - film face






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






45. 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






46. Die-cut web adhesive - paper face






47. Dead zones that surround protrusions in antenna footprint






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. 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






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