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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. 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.
Tag Antenna Construction
Autonomous Mode
RFID Reader
Flip-chip (Chip-to-Tag)
2. Interprets the signal received from reader and controls memory storage and retrieval
Processor
Linear Polarized Reader Antenna
Antenna/Inductor
RFID Reader
3. Dead zones that surround protrusions in antenna footprint
Reader Antenna
Nulls(Voids)
Microwave Frequency
Annunciator
4. Provides electrical power to other tag elements - Can harvest power from the signal received from the reader - Can have its own internal power source - Active - semi-passive and passive
Main Components of RFID Tag
Copper Etching
Power Source
Tag List
5. Image "burned" into photopolymer layer. All copper removed except where image was burned. Copper antenna goes through additional processes to protect from oxidation
Integrated Circuit Chips
Inductive Coupling
Copper Etching
Screen Printing
6. The 3D energy field generated by the antenna (also called reading area)
Serial Reader
Pattern(Footprint)
Flip-chip (Chip-to-Tag)
Passive Backscatter (Capacitive Coupling)
7. 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
Smart Label
Power/Attenuation
Modulation Circuitry
Antenna Footprint
8. The orientation of the transmitted electromagnetic field or the direction of oscillation of electromagnetically emitted waves
Wet Inlay
Polarization
Tag Collision
RFID Reader
9. Low Frequency(LF) - High Frequency(HF) - Ultra high frequency (UHF) and Microwave frequency
Passive Backscatter (Capacitive Coupling)
Types of Tag Frequencies
Transmitter
Equivalent Isotropic Radiated Power (EIRP)
10. Die-cut web adhesive - paper face
Commissioning The Tag
Power Source
Tag
Tag class
11. UHF and microwave passive tags
Equivalent Isotropic Radiated Power (EIRP)
Processor
Strap-to-Tag
Passive Backscatter (Capacitive Coupling)
12. Neighboring readers interrogate a tag simultaneously (can be easily solved because they can detect this and communicate to each other)
Attenuator
Antenna/Inductor
Effective Radiated Power (ERP)
Reader Collision
13. In this mode - reader continuously reads tags in its read zone
Power Source
Annunciator
Power/Attenuation
Autonomous Mode
14. Time for an associated tag to be read
Persist Time
RFID Reader
Strap-to-Tag
UHF
15. Inductive coupling and passive backscatter (capacitive coupling)
Autonomous Mode
Effective Radiated Power (ERP)
RFID Reader
RFID SyCommunication methods
16. IC Chip - Antenna/Inductor - Power Source
Interactive Mode
Main Components of RFID Tag
Passive Backscatter (Capacitive Coupling)
Power/Attenuation
17. Pattern(Footprint) - Power/Attenuation - and Polarization
Sensor
Tag List
Characteristics Of Antennas That Contribute To Tag Readability
RFID SyCommunication methods
18. Die used to "stamp" out the shape of antenna. Take up roller rolls the unused material into waste roll.
Foil Stamping
Microwave Frequency
Copper Etching
RFID Printer
19. 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
Sensor
Constructive Interference
Low Frequency (LF)
Circular Polarized Reader Antenna
20. 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
Microwave Frequency
Commissioning The Tag
Reader Antennas
Characteristics Of Antennas That Contribute To Tag Readability
21. Optical and RFID hybrid
Equivalent Isotropic Radiated Power (EIRP)
Destructive Interference
Smart Label
Flip-chip (Chip-to-Tag)
22. 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 class
ALOHA
Screen Printing
23. Proximity systems (low range -mm) medium range (cm) and long range (m)
Tag List
Read range
Types of Tag Frequencies
Wet Inlay
24. 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%)
Tag Generations
UHF
ALOHA
Strap-to-Tag
25. Every time a tag is read - it is saved to this
ALOHA
Tag List
Stationary Reader
Modulation Circuitry
26. Inductive coupling and passive backscatter (capacitive coupling)
Tag
Interactive Mode
Power/Attenuation
Passive Communication Methods
27. Process of creating a tag and uniquely associating it with an object
Antenna/Inductor
Commissioning The Tag
ALOHA
Types of tags
28. Generation= Timeline of Introduction - Gen 1 & 2 - Gen 2 protocol backward compatible
Tag Antenna Construction
Tag Generations
Agile Reader
Memory
29. Tags collide completely or not at all (Theoretically proven maximum utilization= 36.8%)
Persist Time
Slotted ALOHA
Antenna Footprint
Linear Polarized Reader Antenna
30. 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
Passive Backscatter (Capacitive Coupling)
Strap-to-Tag
Microwave Frequency
Wet Inlay
31. Continuous web - no adhesive
Types of tags
Dry Inlay
Tag List
Circular Polarized Reader Antenna
32. In this this antenna type - the RF waves emanate in a linear pattern from the antenna. Waves have only one energy field
Tag Collision
Linear Polarized Antenna
Reader Collision
Strap-to-Tag
33. controls the internal functions under the command of the processor
Adaptive Binary Tree Anti-Collision
Stationary Reader
Control Circuitry
Reader Collision
34. Reader that can operate in different frequencies or can use different tag-to-reader communication protocols (generally stationary)
Main Components of RFID Tag
Agile Reader
ALOHA
Low Frequency (LF)
35. Responsible for implementing the reader protocol to communicate with compatible tags
Equivalent Isotropic Radiated Power (EIRP)
Processor
Sensor
Microprocessor
36. Receives signal from reader and radiates a response back to the reader - LF or HF: induction coil - UHF or Microwave Frequency: printed antennas
Slotted ALOHA
Annunciator
Persist Time
Antenna/Inductor
37. 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
Screen Printing
Attenuator
Persist Time
Inductive Coupling
38. 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
Low Frequency (LF)
Integrated Circuit Chips
Screen Printing
Wet Inlay
39. When two waves (in phase) impose on each other and enhance the original signal and give rise to protrusions
Circular Polarized Reader Antenna
Foil Stamping
Constructive Interference
Tag class
40. '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
RFID Reader
Slotted ALOHA
Polarization
PLC
41. Measurement of power for radiation of antenna used in US
Tag
Microprocessor
Equivalent Isotropic Radiated Power (EIRP)
Passive Communication Methods
42. The time during which a reader can emit RF energy to read tags
Duty Cycle
Constructive Interference
Reader Antennas
Tag class
43. 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
Screen Printing
Serial Reader
Sensor
Transmitter
44. These are categorized into Aloha based protocols and tree based
Passive Backscatter (Capacitive Coupling)
Destructive Interference
Memory
Tag Anti-Collision Protocols
45. Die-cut web with adhesive - film face
Annunciator
Actuator
Transmitter
Wet Inlay
46. 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...
Circular Polarized Reader Antenna
Memory
Tag Antenna Construction
Tag Generations
47. 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
Polarization
ALOHA
Passive Backscatter (Capacitive Coupling)
Power/Attenuation
48. 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
Commissioning The Tag
Inductive Coupling
Agile Reader
Pattern(Footprint)
49. When two waves (out of phase) impose on each other and the original signal is cancelled. Nulls are created s a result
Screen Printing
ALOHA
Destructive Interference
Stationary Reader
50. The act of writing the tag data by reader
Creating A Tag
Characteristics Of Antennas That Contribute To Tag Readability
Low Frequency (LF)
Antenna Footprint