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






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






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






4. 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






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






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






7. 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






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






9. Smart cards - smart label - etc.






10. 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






11. 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






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






13. 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






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






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






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






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. Continuous web - no adhesive






19. 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






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






21. 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






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






23. Optical and RFID hybrid






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






25. The act of writing the tag data by reader






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






27. 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






28. 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






29. '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






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






31. Time for an associated tag to be read






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






33. 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






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






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






36. 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...






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






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






39. 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.






40. 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






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






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






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






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






45. 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






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






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






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






49. UHF and microwave passive tags






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