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






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






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






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






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






6. 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






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






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






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






10. 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






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






12. '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






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






14. Time for an associated tag to be read






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






16. 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






17. IC Chip - Antenna/Inductor - Power Source






18. Inductive coupling and passive backscatter (capacitive coupling)






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






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






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






22. 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






23. Optical and RFID hybrid






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






25. 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






26. Die-cut web adhesive - paper face






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






28. 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






29. Die-cut web with adhesive - film face






30. 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






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






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






33. 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






34. 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






35. 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...






36. 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






37. 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






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






39. 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.






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






41. UHF and microwave passive tags






42. 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)






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






44. 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






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






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






47. 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%)






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






49. Brains of the RFID tag






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