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Test your basic knowledge |
RFID Technology
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Subject
:
it-skills
Instructions:
Answer 50 questions in 15 minutes.
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.
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. 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
Modulation Circuitry
Microwave Frequency
Adaptive Binary Tree Anti-Collision
Strap-to-Tag
2. Optical and RFID hybrid
Transmitter
Smart Label
ALOHA
Interactive Mode
3. Inductive coupling and passive backscatter (capacitive coupling)
Passive Communication Methods
Processor
Inductive Coupling
Modulation Circuitry
4. 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
Persist Time
Reader Antenna
Circular Polarized Antenna
Copper Etching
5. IC Chip - Antenna/Inductor - Power Source
Actuator
Copper Etching
ALOHA
Main Components of RFID Tag
6. UHF and microwave passive tags
Passive Backscatter (Capacitive Coupling)
Circular Polarized Antenna
Decommissioning The Tag
Power Source
7. Die used to "stamp" out the shape of antenna. Take up roller rolls the unused material into waste roll.
Autonomous Mode
Foil Stamping
Reader Collision
RFID Reader
8. Inductive coupling and passive backscatter (capacitive coupling)
RFID SyCommunication methods
Memory
Stationary Reader
Attenuator
9. A mechanical device for controlling or moving objects - A programmable logic controller (PLC) - robot arm - mechanical arm - etc.
Actuator
Slotted ALOHA
ALOHA
Adaptive Binary Tree Anti-Collision
10. 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
Power Source
Duty Cycle
Tag
Serial Reader
11. The reflection of reader antenna signals on RF-opaque causes this
Multipath
Equivalent Isotropic Radiated Power (EIRP)
Duty Cycle
Attenuator
12. 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
Serial Reader
Microwave Frequency
Transmitter
13. Divides time into discrete time intervals (slots) . A packet can only be transmitted at the beginning of a slot - reduces the collision duration.
Main Components of RFID Tag
Slotted ALOHA
Nulls(Voids)
Tag
14. 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%)
Circular Polarized Antenna
Receiver
ALOHA
Agile Reader
15. Pattern(Footprint) - Power/Attenuation - and Polarization
Linear Polarized Reader Antenna
Creating A Tag
Flip-chip (Chip-to-Tag)
Characteristics Of Antennas That Contribute To Tag Readability
16. Receives analog signals from the tag via the reader antenna
Low Frequency (LF)
Main Components of RFID Tag
Receiver
Tag Anti-Collision Protocols
17. These are categorized into Aloha based protocols and tree based
Tag Antenna Construction
Annunciator
Foil Stamping
Tag Anti-Collision Protocols
18. In this this antenna type - the RF waves emanate in a linear pattern from the antenna. Waves have only one energy field
Multipath
Linear Polarized Antenna
Polarization
Smart Label
19. 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)
Polarization
Circular Polarized Antenna
Foil Stamping
Equivalent Isotropic Radiated Power (EIRP)
20. 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
Types of Tag Frequencies
Attenuator
Circular Polarized Reader Antenna
Integrated Circuit Chips
21. changes signal received from reader to include data that will be transmitted back to the reader
Linear Polarized Reader Antenna
Low Frequency (LF)
Types of tags
Modulation Circuitry
22. In this mode - reader continuously reads tags in its read zone
RFID Reader
Power/Attenuation
Processor
Autonomous Mode
23. When two waves (out of phase) impose on each other and the original signal is cancelled. Nulls are created s a result
Power Source
Integrated Circuit Chips
Read range
Destructive Interference
24. Brains of the RFID tag
Slotted ALOHA
Flip-chip (Chip-to-Tag)
Coupling Element
Integrated Circuit Chips
25. The 3D energy field generated by the antenna (also called reading area)
Passive Backscatter (Capacitive Coupling)
Reader Antenna
Linear Polarized Antenna
Pattern(Footprint)
26. 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
Strap-to-Tag
Inductive Coupling
Passive Backscatter (Capacitive Coupling)
Power Source
27. 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
Effective Radiated Power (ERP)
ALOHA
Tag Anti-Collision Protocols
Processor
28. Mount the tiny chip to a strap - Greater handling ability - Possibility to use very small chips - Possibility of higher volume production - Fluidic Self Assembly
ALOHA
Strap-to-Tag
Dry Inlay
Slotted ALOHA
29. 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
Receiver
Memory
Tag
30. Dead zones that surround protrusions in antenna footprint
Nulls(Voids)
Effective Radiated Power (ERP)
Flip-chip (Chip-to-Tag)
RFID Printer
31. Smart cards - smart label - etc.
Annunciator
Types of tags
Tag List
Effective Radiated Power (ERP)
32. 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...
Polarization
Modulation Circuitry
Tag Antenna Construction
Tag
33. 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
Characteristics Of Antennas That Contribute To Tag Readability
Microprocessor
Stationary Reader
Commissioning The Tag
34. Used to transmit AC power and the clock cycle via its antennas to the tags in its read zone
Circular Polarized Antenna
Autonomous Mode
Transmitter
Tag Collision
35. Measurement of power for radiation of antenna used in Europe
PLC
Autonomous Mode
Effective Radiated Power (ERP)
Modulation Circuitry
36. Type of stationary reader that can print a bar code and create (i.e. write) an RFID tag on a smart label in an integrated operation - Reads the smart label tag that it has just written to validate the write operation. If the validation fails - it rej
RFID SyCommunication methods
Types of Tag Frequencies
Coupling Element
RFID Printer
37. Process of creating a tag and uniquely associating it with an object
Integrated Circuit Chips
Commissioning The Tag
Dry Inlay
Power/Attenuation
38. Used for storing data such as the reader configuration parameters and a list of tag reads
Tag Collision
Multipath
Inductive Coupling
Memory
39. Neighboring readers interrogate a tag simultaneously (can be easily solved because they can detect this and communicate to each other)
Tag Standards
Duty Cycle
PLC
Reader Collision
40. Interprets the signal received from reader and controls memory storage and retrieval
RFID Reader
Transmitter
Processor
Attenuator
41. 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
Wet Inlay
Adaptive Binary Tree Anti-Collision
Tag Collision
42. 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
Tag Anti-Collision Protocols
Autonomous Mode
Reader Antennas
Polarization
43. When two waves (in phase) impose on each other and enhance the original signal and give rise to protrusions
Constructive Interference
Coupling Element
Creating A Tag
Low Frequency (LF)
44. 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
Circular Polarized Antenna
Wet Inlay
Constructive Interference
45. Proximity systems (low range -mm) medium range (cm) and long range (m)
Linear Polarized Antenna
Screen Printing
Read range
Annunciator
46. 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
Passive Backscatter (Capacitive Coupling)
Creating A Tag
47. Measurement of power for radiation of antenna used in US
Copper Etching
Wet Inlay
Low Frequency (LF)
Equivalent Isotropic Radiated Power (EIRP)
48. Readability of a tag greatly depends on this and the angle at which the tag is presented to the reader
Modulation Circuitry
Polarization
Transmitter
Circular Polarized Reader Antenna
49. Also called an 'interrogator' - A device that can read from and write data to compatible RFID tags - Also doubles up as a writer
Integrated Circuit Chips
Flip-chip (Chip-to-Tag)
RFID Reader
Linear Polarized Reader Antenna
50. Similar to guessing a number made of 1's and 0's by guessing each number one at a time
Duty Cycle
Adaptive Binary Tree Anti-Collision
Creating A Tag
Microprocessor
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