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Test your basic knowledge |
RFID Technology
Start Test
Study First
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. 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
Antenna Footprint
Memory
Screen Printing
Inductive Coupling
2. Open image in meshed screens. Conductive ink "squeezed" thru open mesh.
Creating A Tag
Screen Printing
Tag
Antenna Footprint
3. 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.
Coupling Element
Tag Generations
ALOHA
Inductive Coupling
4. 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
Circular Polarized Reader Antenna
ALOHA
UHF
Inductive Coupling
5. Inductive coupling and passive backscatter (capacitive coupling)
RFID SyCommunication methods
Linear Polarized Reader Antenna
ALOHA
Power/Attenuation
6. The reflection of reader antenna signals on RF-opaque causes this
Multipath
Foil Stamping
Reader Antenna
Smart Label
7. These are categorized into Aloha based protocols and tree based
Tag Anti-Collision Protocols
Dry Inlay
Types of tags
Tag Antenna Construction
8. 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
Power/Attenuation
Power Source
Tag
Tag class
9. Pattern(Footprint) - Power/Attenuation - and Polarization
Transmitter
Characteristics Of Antennas That Contribute To Tag Readability
Adaptive Binary Tree Anti-Collision
Circular Polarized Antenna
10. Serves as writable or non-writable data storage
Duty Cycle
Memory
Inductive Coupling
Constructive Interference
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
Main Components of RFID Tag
Serial Reader
Circular Polarized Reader Antenna
Passive Backscatter (Capacitive Coupling)
12. 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
Passive Backscatter (Capacitive Coupling)
Creating A Tag
Decommissioning The Tag
UHF
13. In this this antenna type - the RF waves emanate in a linear pattern from the antenna. Waves have only one energy field
Main Components of RFID Tag
RFID Printer
Coupling Element
Linear Polarized Antenna
14. 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...
Receiver
Tag Antenna Construction
Screen Printing
Interactive Mode
15. Die used to "stamp" out the shape of antenna. Take up roller rolls the unused material into waste roll.
Foil Stamping
Tag Anti-Collision Protocols
Constructive Interference
Effective Radiated Power (ERP)
16. Dead zones that surround protrusions in antenna footprint
Nulls(Voids)
Tag class
Low Frequency (LF)
Sensor
17. To disassociate the tag from a tagged object and optionally destroy it
Decommissioning The Tag
Reader Antennas
Modulation Circuitry
RFID Reader
18. Divides time into discrete time intervals (slots) . A packet can only be transmitted at the beginning of a slot - reduces the collision duration.
Slotted ALOHA
Persist Time
PLC
Inductive Coupling
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
Memory
Stationary Reader
Linear Polarized Reader Antenna
Antenna/Inductor
20. 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
Tag Collision
Power/Attenuation
Linear Polarized Reader Antenna
Microwave Frequency
21. Standards = EPC global & ISO 18000 - Different Organizations
Antenna/Inductor
RFID Reader
Tag Standards
Main Components of RFID Tag
22. When two waves (out of phase) impose on each other and the original signal is cancelled. Nulls are created s a result
Destructive Interference
Tag Antenna Construction
Dry Inlay
Serial Reader
23. The 3D energy field generated by the antenna (also called reading area)
Microwave Frequency
Power Source
Receiver
Pattern(Footprint)
24. Mount the tiny chip to a strap - Greater handling ability - Possibility to use very small chips - Possibility of higher volume production - Fluidic Self Assembly
Antenna Footprint
Strap-to-Tag
Slotted ALOHA
Tag Anti-Collision Protocols
25. Also called an 'interrogator' - A device that can read from and write data to compatible RFID tags - Also doubles up as a writer
Constructive Interference
Agile Reader
Slotted ALOHA
RFID Reader
26. Image "burned" into photopolymer layer. All copper removed except where image was burned. Copper antenna goes through additional processes to protect from oxidation
Passive Communication Methods
Circular Polarized Reader Antenna
RFID Reader
Copper Etching
27. Low Frequency(LF) - High Frequency(HF) - Ultra high frequency (UHF) and Microwave frequency
Screen Printing
Types of Tag Frequencies
Passive Backscatter (Capacitive Coupling)
Polarization
28. An electronic signal or indicator - Audible alarms - strobes - light stacks - etc.
RFID SyCommunication methods
Tag Antenna Construction
Annunciator
Stationary Reader
29. Brains of the RFID tag
Integrated Circuit Chips
Control Circuitry
Effective Radiated Power (ERP)
Creating A Tag
30. Tags collide completely or not at all (Theoretically proven maximum utilization= 36.8%)
Power Source
Tag Generations
Slotted ALOHA
Transmitter
31. Readability of a tag greatly depends on this and the angle at which the tag is presented to the reader
Duty Cycle
Antenna Footprint
Polarization
Passive Communication Methods
32. Reader transmits a continuous-wave RF signal into the reading environment
Inductive Coupling
Power/Attenuation
Passive Backscatter (Capacitive Coupling)
Linear Polarized Antenna
33. 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
Stationary Reader
RFID SyCommunication methods
Low Frequency (LF)
UHF
34. Measurement of power for radiation of antenna used in US
Annunciator
Equivalent Isotropic Radiated Power (EIRP)
RFID Printer
Polarization
35. 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.
Agile Reader
Flip-chip (Chip-to-Tag)
Types of tags
Characteristics Of Antennas That Contribute To Tag Readability
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
Linear Polarized Reader Antenna
Inductive Coupling
Antenna Footprint
Agile Reader
37. Used for storing data such as the reader configuration parameters and a list of tag reads
Read range
Stationary Reader
Memory
Antenna/Inductor
38. 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
Characteristics Of Antennas That Contribute To Tag Readability
Tag class
Wet Inlay
PLC
39. Die-cut web adhesive - paper face
Coupling Element
Tag
Commissioning The Tag
UHF
40. Optical and RFID hybrid
Smart Label
Annunciator
Characteristics Of Antennas That Contribute To Tag Readability
Foil Stamping
41. '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
Coupling Element
RFID Reader
Tag class
PLC
42. 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
Autonomous Mode
Circular Polarized Antenna
Microwave Frequency
Power Source
43. Generation= Timeline of Introduction - Gen 1 & 2 - Gen 2 protocol backward compatible
Tag Generations
Linear Polarized Antenna
Slotted ALOHA
Memory
44. UHF and microwave passive tags
Memory
Attenuator
Types of tags
Passive Backscatter (Capacitive Coupling)
45. 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
Antenna Footprint
Attenuator
Integrated Circuit Chips
Memory
46. Receives signal from reader and radiates a response back to the reader - LF or HF: induction coil - UHF or Microwave Frequency: printed antennas
Read range
Antenna/Inductor
Polarization
Memory
47. Smart cards - smart label - etc.
Attenuator
Types of tags
Power/Attenuation
Microwave Frequency
48. 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
Interactive Mode
Characteristics Of Antennas That Contribute To Tag Readability
Reader Antenna
Flip-chip (Chip-to-Tag)
49. Continuous web - no adhesive
Commissioning The Tag
Dry Inlay
RFID SyCommunication methods
Main Components of RFID Tag
50. Responsible for implementing the reader protocol to communicate with compatible tags
Microprocessor
Autonomous Mode
Slotted ALOHA
Decommissioning The Tag