How does a transponder work?

This device is placed on the inside of the car's windshield behind the rearview mirror. A transponder is a battery-operated, radio frequency identification (RFID) unit that transmits radio signals. These antennas emit radio frequencies that communicate with the transponder.
A.

Can you use a transponder in another car?

Yes, you may transfer a transponder between vehicles as long as they are of the same vehicle class. There are penalties for using a transponder in a different vehicle class (i.e. Car transponder in a tractor- trailer.) Please be sure that all vehicles using the transponder are listed on your EZ Pass account.
  • What States Can I use my EZ Pass?

    For a list of toll roads, bridges and tunnels in states that offer E-ZPass, Click on a state for links and information.
    • Delaware.
    • District of Columbia.
    • Illinois.
    • Indiana.
    • Kentucky.
    • Maine.
    • Maryland.
    • Massachusetts.
  • Do e zpass transponders have batteries?

    Drivers either pay via E-ZPass or the system records an image of the vehicle's license plate so a toll bill can go out in the mail. The E-ZPass battery is sealed inside the transponder. You can't replace the battery yourself, but it should last about a decade before you need to replace the transponder.
  • How do I return my EZ Pass NJ?

    Please do not return your tag to the address printed on the tag. Send your tag(s) to the New Jersey E-ZPass Customer Service Center, P.O. Box 52003, Newark, NJ 07101-8203. When your tag is received in good condition, we will refund your tag deposit, if applicable, plus any unused toll balance, generally within 30 days.
B.

What is a transponder in RFID?

An RFID transponder is a special kind of radio transmitter and reciever. It is activated when it receives a signal of a specific kind. RFID transponders are present in smart cards and Radio Frequency Identification tags.
  • How much is an RFID tag?

    Generally speaking, finished smart labels that can be applied to cases and pallets typically cost 15 cents or more, depending on volume. Active tags – those with a battery – can cost far more. And, if you bundle in a sophisticated sensor, the cost can rise to more than $50 per tag.
  • How much is a RFID reader?

    Most UHF readers cost from $500 to $2,000, depending on the features in the device. Companies may also have to buy each antenna separately, along with cables. Antennae are about $200 and up. The price of UHF readers has been falling as production ramps up with adoption.
  • How are RFID tags powered?

    Passive RFID systems use tags with no internal power source and instead are powered by the electromagnetic energy transmitted from an RFID reader. Passive RFID tags are used for applications such as access control, file tracking, race timing, supply chain management, smart labels, and more.
C.

What is the difference between uplink and downlink?

The communication going from a satellite to ground is called downlink, and when it is going from ground to a satellite it is called uplink. When an uplink is being received by the spacecraft at the same time a downlink is being received by Earth, the communication is called two-way.
  • What is the backbone of a network?

    A backbone is a part of computer network that interconnects various pieces of network, providing a path for the exchange of information between different LANs or subnetworks. A backbone can tie together diverse networks in the same building, in different buildings in a campus environment, or over wide areas.
  • What is uplink and downlink frequencies?

    In satellite telecommunication, a downlink is the link from a satellite down to one or more ground stations or receivers, and an uplink is the link from a ground station up to a satellite. Some companies sell uplink and downlink services to television stations, corporations, and to other telecommunication carriers.
  • What is a shared medium?

    In telecommunication, a shared medium is a medium or channel of information transfer that serves more than one user at the same time. Most channels only function correctly when one user is transmitting, so a channel access method is always in effect.

Updated: 3rd October 2019

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