transponder


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transponder

[tranz′pän·dər]
(communications)
A transmitter-receiver capable of accepting the challenge of an interrogator and automatically transmitting an appropriate reply.
A receiver-transmitter, such as on satellites, which receives a transmission and retransmits it at another radio frequency.

transponder

A receiver/transmitter that will generate a reply signal upon proper interrogation; the interrogation and reply being on different frequencies (ICAO). The transponder may be ground-based or be in an aircraft. It also could be the airborne radar beacon receiver/transmitter portion of the air traffic control radar beacon system (ATCRBS), which automatically receives radio signals from interrogators on the ground and selectively replies with a specific reply pulse, or pulse group, only to those interrogations received on the mode to which it is set to respond.

transponder

A receiver/transmitter on a communications satellite. It receives a microwave signal from earth (uplink), amplifies it and retransmits it back to earth at a different frequency (downlink). A satellite has several transponders.
References in periodicals archive ?
The IL-20 flew with its onboard transponder off, had no flight plan, and did not maintain radio communication with the regional air traffic control centre.
Thus, transponders are integrated with drones to facilitate improved surveillance picture to the controller.
"That indicates to us that our customers are obtaining more transponders to ensure they have transponders in every vehicle, which was the goal of this policy."
Here, only the passive wireless readout distance between the reader and the transponder is going to be measured, so three fixed value capacitors are used to represent the three capacitive sensors.
Our OcNOS already supports a rich set of switching and routing features, and its availability on Edgecore's Cassini packet optical transponder will help network operators easily extend and migrate existing metro and long-haul Dense Wavelength Division Multiplexing (DWDM) networks to add new 100G capacities, and extend inter-DC L2 and L3 services.
Today, there are multiple reply modes with which a transponder might respond.
The report covers the present scenario and the growth prospects of the global satellite transponder market for 2016-2020.
The output of the phase angle in combination with the RSSI value of the transponder response allows a distinction between moving transponders and static transponders located in the antenna field.
When opened, the transponder reads out the procedure to follow and where the chest pads should be placed.
As a result, it is now possible for an object or component that is equipped with an RFID transponder to determine and wirelessly transfer not only its own ID, but also its current status with the help of connected sensors.
The transponder would still have to radiate 250 watts so cooling much smaller circuitry is difficult.