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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. Used to transmit AC power and the clock cycle via its antennas to the tags in its read zone
Linear Polarized Reader Antenna
Stationary Reader
Transmitter
Receiver
2. 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
Power/Attenuation
ALOHA
Microwave Frequency
Tag Antenna Construction
3. Die-cut web with adhesive - film face
Persist Time
Tag Anti-Collision Protocols
Types of tags
Wet Inlay
4. Neighboring readers interrogate a tag simultaneously (can be easily solved because they can detect this and communicate to each other)
Tag Generations
Modulation Circuitry
Annunciator
Reader Collision
5. Responsible for implementing the reader protocol to communicate with compatible tags
Inductive Coupling
Microprocessor
Power/Attenuation
Wet Inlay
6. 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
Inductive Coupling
UHF
Destructive Interference
Reader Collision
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
Linear Polarized Reader Antenna
Tag Generations
Autonomous Mode
Antenna Footprint
8. In this this antenna type - the RF waves emanate in a linear pattern from the antenna. Waves have only one energy field
Tag Antenna Construction
Reader Antennas
Linear Polarized Antenna
Autonomous Mode
9. IC Chip - Antenna/Inductor - Power Source
Main Components of RFID Tag
Tag Standards
Multipath
Inductive Coupling
10. Brains of the RFID tag
Strap-to-Tag
Integrated Circuit Chips
Reader Collision
Passive Backscatter (Capacitive Coupling)
11. 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
Tag
Low Frequency (LF)
Processor
12. The reflection of reader antenna signals on RF-opaque causes this
Multipath
Passive Backscatter (Capacitive Coupling)
Slotted ALOHA
Copper Etching
13. 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
Attenuator
RFID Reader
Interactive Mode
Types of tags
14. Die used to "stamp" out the shape of antenna. Take up roller rolls the unused material into waste roll.
Smart Label
Foil Stamping
Annunciator
Creating A Tag
15. Time for an associated tag to be read
Persist Time
Serial Reader
Read range
Antenna Footprint
16. 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
RFID Reader
Control Circuitry
Tag Antenna Construction
Linear Polarized Reader Antenna
17. 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
Tag Antenna Construction
Reader Antenna
Tag Collision
Read range
18. 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
Sensor
Power/Attenuation
Inductive Coupling
Microwave Frequency
19. An electronic signal or indicator - Audible alarms - strobes - light stacks - etc.
Linear Polarized Antenna
Wet Inlay
Annunciator
Slotted ALOHA
20. 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
RFID SyCommunication methods
Serial Reader
Pattern(Footprint)
Stationary Reader
21. Also called an 'interrogator' - A device that can read from and write data to compatible RFID tags - Also doubles up as a writer
ALOHA
RFID Reader
Antenna/Inductor
Tag
22. Receives signal from reader and radiates a response back to the reader - LF or HF: induction coil - UHF or Microwave Frequency: printed antennas
RFID Reader
ALOHA
Antenna/Inductor
Tag Standards
23. A mechanical device for controlling or moving objects - A programmable logic controller (PLC) - robot arm - mechanical arm - etc.
Screen Printing
Actuator
Effective Radiated Power (ERP)
Passive Backscatter (Capacitive Coupling)
24. Similar to guessing a number made of 1's and 0's by guessing each number one at a time
Low Frequency (LF)
Passive Backscatter (Capacitive Coupling)
Adaptive Binary Tree Anti-Collision
Duty Cycle
25. Inductive coupling and passive backscatter (capacitive coupling)
Linear Polarized Antenna
Types of Tag Frequencies
Transmitter
RFID SyCommunication methods
26. Serves as writable or non-writable data storage
Memory
Equivalent Isotropic Radiated Power (EIRP)
Serial Reader
UHF
27. Open image in meshed screens. Conductive ink "squeezed" thru open mesh.
Low Frequency (LF)
Serial Reader
Characteristics Of Antennas That Contribute To Tag Readability
Screen Printing
28. UHF and microwave passive tags
Sensor
Attenuator
Passive Backscatter (Capacitive Coupling)
Polarization
29. 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...
Tag Antenna Construction
Memory
Power Source
Serial Reader
30. Low Frequency(LF) - High Frequency(HF) - Ultra high frequency (UHF) and Microwave frequency
Types of Tag Frequencies
Duty Cycle
Nulls(Voids)
Main Components of RFID Tag
31. Tags collide completely or not at all (Theoretically proven maximum utilization= 36.8%)
Actuator
Antenna/Inductor
Integrated Circuit Chips
Slotted ALOHA
32. Pattern(Footprint) - Power/Attenuation - and Polarization
Destructive Interference
Characteristics Of Antennas That Contribute To Tag Readability
Slotted ALOHA
Decommissioning The Tag
33. 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
Effective Radiated Power (ERP)
Attenuator
Linear Polarized Reader Antenna
34. 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
PLC
Tag Anti-Collision Protocols
Autonomous Mode
Low Frequency (LF)
35. 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
Constructive Interference
Circular Polarized Reader Antenna
Tag Collision
Tag Generations
36. Divides time into discrete time intervals (slots) . A packet can only be transmitted at the beginning of a slot - reduces the collision duration.
Tag Anti-Collision Protocols
Slotted ALOHA
Antenna Footprint
ALOHA
37. Process of creating a tag and uniquely associating it with an object
Tag
Commissioning The Tag
Passive Backscatter (Capacitive Coupling)
Polarization
38. 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
Processor
Flip-chip (Chip-to-Tag)
Tag Standards
Power Source
39. 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
Nulls(Voids)
RFID Reader
RFID Reader
40. Reader transmits a continuous-wave RF signal into the reading environment
RFID Reader
Linear Polarized Antenna
Passive Backscatter (Capacitive Coupling)
Autonomous Mode
41. Image "burned" into photopolymer layer. All copper removed except where image was burned. Copper antenna goes through additional processes to protect from oxidation
Types of tags
RFID Reader
Passive Communication Methods
Copper Etching
42. Generation= Timeline of Introduction - Gen 1 & 2 - Gen 2 protocol backward compatible
Tag Generations
Strap-to-Tag
Circular Polarized Reader Antenna
Reader Antenna
43. Measurement of power for radiation of antenna used in US
Equivalent Isotropic Radiated Power (EIRP)
Multipath
Slotted ALOHA
Sensor
44. Proximity systems (low range -mm) medium range (cm) and long range (m)
Creating A Tag
Read range
Passive Communication Methods
Flip-chip (Chip-to-Tag)
45. 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.
Microprocessor
Integrated Circuit Chips
Flip-chip (Chip-to-Tag)
Linear Polarized Antenna
46. 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
Reader Collision
Power/Attenuation
Interactive Mode
Polarization
47. changes signal received from reader to include data that will be transmitted back to the reader
Modulation Circuitry
Dry Inlay
ALOHA
Duty Cycle
48. The orientation of the transmitted electromagnetic field or the direction of oscillation of electromagnetically emitted waves
RFID Reader
Interactive Mode
Polarization
ALOHA
49. These are categorized into Aloha based protocols and tree based
Tag Collision
Receiver
Low Frequency (LF)
Tag Anti-Collision Protocols
50. 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)
Commissioning The Tag
Stationary Reader
Wet Inlay
Circular Polarized Antenna