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. 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






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






3. 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






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






5. Dead zones that surround protrusions in antenna footprint






6. Die-cut web adhesive - paper face






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






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






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






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






11. 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






12. 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






13. 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






14. Every time a tag is read - it is saved to this






15. Continuous web - no adhesive






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






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






18. The act of writing the tag data by reader






19. 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






20. Brains of the RFID tag






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






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






23. 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






24. 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






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






26. 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






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






28. 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






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






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






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






32. 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)






33. 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






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






35. 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






36. 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.






37. 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






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






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






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






41. Optical and RFID hybrid






42. Die-cut web with adhesive - film face






43. 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...






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






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






46. 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






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






48. Smart cards - smart label - etc.






49. Serves as writable or non-writable data storage






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