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. 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






2. 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






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






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






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






6. 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






7. 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)






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






9. Continuous web - no adhesive






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






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






12. Die-cut web adhesive - paper face






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






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






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






16. Smart cards - smart label - etc.






17. 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






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






21. 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






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






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






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






25. 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






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






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






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






29. Serves as writable or non-writable data storage






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






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






32. 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






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






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






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






36. One of the most versatile actuators. Widely used in manufacturing plants. They enable a variety of actions to be performed (such as monitoring and controlling a product packaging line - or applying a predetermined amount of torque to nuts in a mechan






37. 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






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. Dead zones that surround protrusions in antenna footprint






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






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






42. IC Chip - Antenna/Inductor - Power Source






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






44. 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






45. '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






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






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






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






49. 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






50. 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