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






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






3. Serves as writable or non-writable data storage






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






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






6. 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






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






8. 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






9. 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






10. 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






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






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






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






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






15. 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






16. Brains of the RFID tag






17. Dead zones that surround protrusions in antenna footprint






18. 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.






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






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






21. 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%)






22. Inductive coupling and passive backscatter (capacitive coupling)






23. 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






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






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






26. 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






27. 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)






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






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






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






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






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






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






34. 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






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






36. 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






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






38. 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






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






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






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






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






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






44. 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.






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






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






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






48. IC Chip - Antenna/Inductor - Power Source






49. 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






50. 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