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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. 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






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






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






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






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






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






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






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






9. Smart cards - smart label - etc.






10. Brains of the RFID tag






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






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






13. 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






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






15. 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






16. 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






17. 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.






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






20. UHF and microwave passive tags






21. Optical and RFID hybrid






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






24. 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






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






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






28. 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






29. The act of writing the tag data by reader






30. Serves as writable or non-writable data storage






31. 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)






32. Reader communicates to a tag through reader's antennas - a separate device that is physically attached to a reader - at one of its antenna ports - by means of cable. Called this because it creates an electromagnetic field to couple with the tag.






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






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






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






36. 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






37. Time for an associated tag to be read






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






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






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






41. IC Chip - Antenna/Inductor - Power Source






42. 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...






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






44. Inductive coupling and passive backscatter (capacitive coupling)






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






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






47. 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






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






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






50. 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







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