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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. Tags collide completely or not at all (Theoretically proven maximum utilization= 36.8%)
Constructive Interference
Slotted ALOHA
Circular Polarized Antenna
Types of Tag Frequencies
2. In this mode - reader continuously reads tags in its read zone
Tag Collision
Circular Polarized Antenna
Autonomous Mode
Attenuator
3. Neighboring readers interrogate a tag simultaneously (can be easily solved because they can detect this and communicate to each other)
Reader Collision
Tag
Low Frequency (LF)
RFID Reader
4. The orientation of the transmitted electromagnetic field or the direction of oscillation of electromagnetically emitted waves
Antenna/Inductor
Polarization
Wet Inlay
Main Components of RFID Tag
5. The act of writing the tag data by reader
Copper Etching
Polarization
Read range
Creating A Tag
6. Receives signal from reader and radiates a response back to the reader - LF or HF: induction coil - UHF or Microwave Frequency: printed antennas
Microwave Frequency
Main Components of RFID Tag
Antenna/Inductor
Microprocessor
7. Optical and RFID hybrid
Smart Label
Control Circuitry
Power/Attenuation
Types of tags
8. 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
Wet Inlay
Circular Polarized Reader Antenna
Integrated Circuit Chips
Serial Reader
9. Dead zones that surround protrusions in antenna footprint
Decommissioning The Tag
Sensor
Dry Inlay
Nulls(Voids)
10. 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
RFID SyCommunication methods
Low Frequency (LF)
Integrated Circuit Chips
Flip-chip (Chip-to-Tag)
11. 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
Sensor
Main Components of RFID Tag
Copper Etching
Reader Antenna
12. 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
Flip-chip (Chip-to-Tag)
Microwave Frequency
Modulation Circuitry
RFID Reader
13. 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
Serial Reader
Constructive Interference
Characteristics Of Antennas That Contribute To Tag Readability
Inductive Coupling
14. 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
Main Components of RFID Tag
Power/Attenuation
Linear Polarized Reader Antenna
Screen Printing
15. 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.
Read range
Actuator
Antenna Footprint
Flip-chip (Chip-to-Tag)
16. Used to transmit AC power and the clock cycle via its antennas to the tags in its read zone
RFID Reader
Microprocessor
Power/Attenuation
Transmitter
17. Measurement of power for radiation of antenna used in Europe
Adaptive Binary Tree Anti-Collision
Effective Radiated Power (ERP)
Wet Inlay
Tag class
18. These are categorized into Aloha based protocols and tree based
Circular Polarized Reader Antenna
Tag Anti-Collision Protocols
Memory
ALOHA
19. 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.
Sensor
Serial Reader
Coupling Element
Passive Communication Methods
20. Mount the tiny chip to a strap - Greater handling ability - Possibility to use very small chips - Possibility of higher volume production - Fluidic Self Assembly
Persist Time
Strap-to-Tag
Copper Etching
Slotted ALOHA
21. Responsible for implementing the reader protocol to communicate with compatible tags
RFID Reader
Passive Backscatter (Capacitive Coupling)
Microprocessor
Polarization
22. 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
Attenuator
Stationary Reader
Multipath
23. In this this antenna type - the RF waves emanate in a linear pattern from the antenna. Waves have only one energy field
Linear Polarized Antenna
Pattern(Footprint)
Characteristics Of Antennas That Contribute To Tag Readability
Reader Antennas
24. Also called an 'interrogator' - A device that can read from and write data to compatible RFID tags - Also doubles up as a writer
Memory
UHF
RFID Reader
Reader Antenna
25. IC Chip - Antenna/Inductor - Power Source
Coupling Element
Main Components of RFID Tag
RFID Reader
Circular Polarized Reader Antenna
26. A mechanical device for controlling or moving objects - A programmable logic controller (PLC) - robot arm - mechanical arm - etc.
Actuator
Circular Polarized Antenna
Control Circuitry
Types of tags
27. 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
Types of Tag Frequencies
Memory
Circular Polarized Antenna
Power/Attenuation
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
Integrated Circuit Chips
Polarization
Characteristics Of Antennas That Contribute To Tag Readability
Attenuator
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
Linear Polarized Antenna
RFID Reader
Creating A Tag
Multipath
30. changes signal received from reader to include data that will be transmitted back to the reader
Microprocessor
Stationary Reader
Slotted ALOHA
Modulation Circuitry
31. Serves as writable or non-writable data storage
Transmitter
Wet Inlay
Memory
Stationary Reader
32. Readability of a tag greatly depends on this and the angle at which the tag is presented to the reader
Polarization
Nulls(Voids)
Inductive Coupling
Agile Reader
33. Similar to guessing a number made of 1's and 0's by guessing each number one at a time
Tag Generations
Read range
Coupling Element
Adaptive Binary Tree Anti-Collision
34. Used for storing data such as the reader configuration parameters and a list of tag reads
Memory
Multipath
UHF
Tag Generations
35. 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
Attenuator
Equivalent Isotropic Radiated Power (EIRP)
Destructive Interference
Interactive Mode
36. Process of creating a tag and uniquely associating it with an object
Effective Radiated Power (ERP)
Commissioning The Tag
Nulls(Voids)
Creating A Tag
37. Reader that can operate in different frequencies or can use different tag-to-reader communication protocols (generally stationary)
Constructive Interference
PLC
Agile Reader
Integrated Circuit Chips
38. The reflection of reader antenna signals on RF-opaque causes this
Microprocessor
Memory
Multipath
Antenna/Inductor
39. Class= Functionality - - Class 0 -1 -2 -3 -4 & 5
Tag class
Inductive Coupling
Creating A Tag
Effective Radiated Power (ERP)
40. 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)
Tag Standards
Circular Polarized Antenna
Wet Inlay
Coupling Element
41. More than one tag tries to respond to a reader at the same time.
Adaptive Binary Tree Anti-Collision
Tag
Tag Collision
Screen Printing
42. UHF and microwave passive tags
Creating A Tag
Equivalent Isotropic Radiated Power (EIRP)
Passive Backscatter (Capacitive Coupling)
Constructive Interference
43. Proximity systems (low range -mm) medium range (cm) and long range (m)
Multipath
Characteristics Of Antennas That Contribute To Tag Readability
Read range
Modulation Circuitry
44. 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
Stationary Reader
Passive Backscatter (Capacitive Coupling)
RFID Printer
Main Components of RFID Tag
45. Die-cut web adhesive - paper face
Stationary Reader
Coupling Element
RFID Reader
Tag
46. 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
Tag Anti-Collision Protocols
Tag List
Power Source
Memory
47. Time for an associated tag to be read
Nulls(Voids)
Persist Time
Screen Printing
Sensor
48. The time during which a reader can emit RF energy to read tags
Tag class
Tag Antenna Construction
Duty Cycle
Slotted ALOHA
49. 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
Linear Polarized Reader Antenna
UHF
Multipath
Antenna Footprint
50. The 3D energy field generated by the antenna (also called reading area)
Pattern(Footprint)
Modulation Circuitry
RFID Reader
Circular Polarized Reader Antenna