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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. In this mode - reader continuously reads tags in its read zone
Slotted ALOHA
Autonomous Mode
Persist Time
Flip-chip (Chip-to-Tag)
2. The orientation of the transmitted electromagnetic field or the direction of oscillation of electromagnetically emitted waves
Receiver
Polarization
Passive Backscatter (Capacitive Coupling)
Tag Generations
3. The reflection of reader antenna signals on RF-opaque causes this
Multipath
Reader Antennas
Attenuator
RFID SyCommunication methods
4. 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
Pattern(Footprint)
Stationary Reader
Sensor
Characteristics Of Antennas That Contribute To Tag Readability
5. 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...
Decommissioning The Tag
Stationary Reader
Tag Antenna Construction
Coupling Element
6. Receives signal from reader and radiates a response back to the reader - LF or HF: induction coil - UHF or Microwave Frequency: printed antennas
Antenna/Inductor
Tag class
Equivalent Isotropic Radiated Power (EIRP)
Slotted ALOHA
7. '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
Antenna Footprint
RFID Reader
Persist Time
Passive Backscatter (Capacitive Coupling)
8. Standards = EPC global & ISO 18000 - Different Organizations
Serial Reader
UHF
Tag Standards
Integrated Circuit Chips
9. 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
Serial Reader
Power/Attenuation
RFID Printer
Passive Communication Methods
10. A mechanical device for controlling or moving objects - A programmable logic controller (PLC) - robot arm - mechanical arm - etc.
Processor
Actuator
Receiver
Dry Inlay
11. UHF and microwave passive tags
Polarization
Passive Backscatter (Capacitive Coupling)
Transmitter
Types of tags
12. 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)
Polarization
Copper Etching
Passive Communication Methods
13. Optical and RFID hybrid
Decommissioning The Tag
Smart Label
Screen Printing
Destructive Interference
14. 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
Duty Cycle
PLC
Read range
Microprocessor
15. Used to transmit AC power and the clock cycle via its antennas to the tags in its read zone
Passive Backscatter (Capacitive Coupling)
Persist Time
Transmitter
Effective Radiated Power (ERP)
16. To disassociate the tag from a tagged object and optionally destroy it
Decommissioning The Tag
Antenna/Inductor
Polarization
RFID SyCommunication methods
17. 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)
Copper Etching
UHF
Circular Polarized Antenna
Tag Generations
18. 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.
Flip-chip (Chip-to-Tag)
Foil Stamping
Receiver
Types of Tag Frequencies
19. Open image in meshed screens. Conductive ink "squeezed" thru open mesh.
Tag Anti-Collision Protocols
Decommissioning The Tag
Main Components of RFID Tag
Screen Printing
20. Also called an 'interrogator' - A device that can read from and write data to compatible RFID tags - Also doubles up as a writer
Persist Time
Flip-chip (Chip-to-Tag)
RFID Printer
RFID Reader
21. Measurement of power for radiation of antenna used in US
RFID Reader
Equivalent Isotropic Radiated Power (EIRP)
Antenna/Inductor
Adaptive Binary Tree Anti-Collision
22. 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
Agile Reader
Screen Printing
Duty Cycle
23. 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
UHF
Interactive Mode
Actuator
Creating A Tag
24. An electronic signal or indicator - Audible alarms - strobes - light stacks - etc.
RFID Reader
UHF
Annunciator
Microwave Frequency
25. When two waves (out of phase) impose on each other and the original signal is cancelled. Nulls are created s a result
Modulation Circuitry
Destructive Interference
Circular Polarized Reader Antenna
Tag Anti-Collision Protocols
26. changes signal received from reader to include data that will be transmitted back to the reader
Reader Antenna
Creating A Tag
Modulation Circuitry
ALOHA
27. 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
Reader Antennas
Types of Tag Frequencies
Effective Radiated Power (ERP)
ALOHA
28. Measurement of power for radiation of antenna used in Europe
Dry Inlay
RFID Reader
Effective Radiated Power (ERP)
Circular Polarized Antenna
29. 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
Pattern(Footprint)
Tag Anti-Collision Protocols
Attenuator
Types of Tag Frequencies
30. Low Frequency(LF) - High Frequency(HF) - Ultra high frequency (UHF) and Microwave frequency
Characteristics Of Antennas That Contribute To Tag Readability
Types of Tag Frequencies
Tag List
Circular Polarized Antenna
31. Pattern(Footprint) - Power/Attenuation - and Polarization
Memory
Tag Standards
Smart Label
Characteristics Of Antennas That Contribute To Tag Readability
32. 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
Types of tags
Creating A Tag
Tag
Sensor
33. Image "burned" into photopolymer layer. All copper removed except where image was burned. Copper antenna goes through additional processes to protect from oxidation
Copper Etching
Annunciator
Memory
Memory
34. Die-cut web adhesive - paper face
RFID SyCommunication methods
Tag
Dry Inlay
Reader Antenna
35. Dead zones that surround protrusions in antenna footprint
UHF
Memory
Polarization
Nulls(Voids)
36. 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
Reader Collision
Tag Collision
Power Source
Agile Reader
37. controls the internal functions under the command of the processor
Control Circuitry
Annunciator
Commissioning The Tag
Foil Stamping
38. Serves as writable or non-writable data storage
Tag
Persist Time
Memory
Microwave Frequency
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.
Circular Polarized Reader Antenna
Destructive Interference
Coupling Element
Integrated Circuit Chips
40. Mount the tiny chip to a strap - Greater handling ability - Possibility to use very small chips - Possibility of higher volume production - Fluidic Self Assembly
Stationary Reader
Control Circuitry
Strap-to-Tag
Linear Polarized Antenna
41. Divides time into discrete time intervals (slots) . A packet can only be transmitted at the beginning of a slot - reduces the collision duration.
Linear Polarized Antenna
Slotted ALOHA
Wet Inlay
RFID Printer
42. Similar to guessing a number made of 1's and 0's by guessing each number one at a time
Power/Attenuation
Adaptive Binary Tree Anti-Collision
Commissioning The Tag
Types of tags
43. Inductive coupling and passive backscatter (capacitive coupling)
PLC
Attenuator
RFID SyCommunication methods
Serial Reader
44. Interprets the signal received from reader and controls memory storage and retrieval
Linear Polarized Reader Antenna
Processor
Tag Anti-Collision Protocols
Copper Etching
45. 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
Serial Reader
Tag Anti-Collision Protocols
Circular Polarized Reader Antenna
Modulation Circuitry
46. 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
UHF
Types of Tag Frequencies
RFID Reader
Main Components of RFID Tag
47. Responsible for implementing the reader protocol to communicate with compatible tags
Passive Backscatter (Capacitive Coupling)
Main Components of RFID Tag
Microprocessor
Microwave Frequency
48. 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
Read range
ALOHA
Decommissioning The Tag
Tag Standards
49. When two waves (in phase) impose on each other and enhance the original signal and give rise to protrusions
Persist Time
Inductive Coupling
Decommissioning The Tag
Constructive Interference
50. Proximity systems (low range -mm) medium range (cm) and long range (m)
Decommissioning The Tag
Read range
Slotted ALOHA
ALOHA