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






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






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






4. 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






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






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






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






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






9. 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






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






11. 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






12. 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%)






13. 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






14. Inductive coupling and passive backscatter (capacitive coupling)






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






16. Smart cards - smart label - etc.






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






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






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






21. 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






22. The act of writing the tag data by reader






23. 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






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






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






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






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






28. 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.






29. 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






30. Serves as writable or non-writable data storage






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






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






33. 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






34. '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






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






36. controls the internal functions under the command of the processor






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






38. Continuous web - no adhesive






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






40. 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






41. 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






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






43. UHF and microwave passive tags






44. 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...






45. Die-cut web with adhesive - film face






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






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






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






49. Dead zones that surround protrusions in antenna footprint






50. Optical and RFID hybrid