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. 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%)






2. 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






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






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






5. Inductive coupling and passive backscatter (capacitive coupling)






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






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






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






9. 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






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






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






12. Brains of the RFID tag






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






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






15. 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






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






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






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






19. 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.






20. 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






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






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






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






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






25. 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






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






27. Time for an associated tag to be read






28. Optical and RFID hybrid






29. IC Chip - Antenna/Inductor - Power Source






30. '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






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






32. 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






33. UHF and microwave passive tags






34. 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.






35. The act of writing the tag data by reader






36. 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)






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






38. Inductive coupling and passive backscatter (capacitive coupling)






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






40. Dead zones that surround protrusions in antenna footprint






41. 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






42. 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






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






44. 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






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






46. 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






47. Serves as writable or non-writable data storage






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






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






50. 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