What is a short-range radio device?

Short-range radio device are intended to cover radio transmitters which provide either unidirectional or bidirectional communication and which have low capability of causing interference to other radio equipment.

Short Range Devices (SRD) are radio devices that offer a low risk of interference with other radio services, usually because their transmitted power, and hence their range, is low.

APPLICATIONS OF SHORT RANGE DEVICES

There are many different applications which are provided by a Short range device:

1 . Telecommand
The use of radiocommunication for the transmission of signals to initiate, modify or terminate functions of equipment at a distance. This has a lot of industrial use.

2 . Telemetry
The use of radiocommunication for indicating or recording data at a distance. This application finds a lot of industrial use.

3 . Voice and video
In connection with SRDs, voice covers applications like walkie-talkie.

4 . Equipment for detecting avalanche victims
Avalanche beacons are radio location systems used for searching for and/or finding avalanche victims, for the purpose of direct rescue.

5 . Broadband radio local area networks

6 . Automatic vehicle identification for railways

The automatic vehicle identification (AVI) system uses data transmission between a transponder located on a vehicle and a fixed interrogator positioned on the track to provide for the automatic and unambiguous identification of a passing vehicle.

The system also enables any other stored data to be read and provides for the bidirectional exchange of variable data. Delhi Metro uses this application for its operation.

7 . Inductive applications
Inductive loop systems are communication systems based on magnetic fields generally at low RF frequencies.

Inductive applications include for example car immobilizers, car access systems or car detectors, animal identification, alarm systems,

8 . Radio microphones
Radio microphones (also referred to as wireless microphones or cordless microphones) are small, low power (50 mW or less) unidirectional transmitters designed to be worn on the body, or hand held, for the transmission of sound over short distances for personal use.

9 . RF identification systems
The object of any RF identification (RFID) system is to carry data in suitable transponders, generally known as tags, and to retrieve data, by hand- or machine readable means, at a suitable time and place to satisfy particular application needs.

10 . Ultra low power active medical implant
The ultra low power active medical implant (ULP-AMIs) are part of a medical implant communication systems (MICS) for use with implanted medical devices, like pacemakers, implantable defibrillators, nerve stimulators, and other types of implanted devices.

The MICS uses transceiver modules for radiofrequency communication between an external device referred to as a programmer/controller and a medical implant placed within a human or animal body.

11 . Wireless audio applications
Applications for wireless audio systems include the following: cordless loudspeakers, cordless headphones, cordless headphones for portable use, i.e. portable compact disc players, cassette decks or radio receivers carried on a person, cordless headphones for use in a vehicle, for example for use with a radio or mobile telephone, etc. in-ear monitoring, for use in concerts or other stage productions.

12 . RF (radar) level gauges
RF level gauges have been used in many industries for many years to measure the amount of various materials, primarily stored in an enclosed container or tank.

Must read: Software as a service – SaaS

For more information https://en.wikipedia.org/wiki/Short-range_device#:~:text=Short%2Drange%20wireless%20technologies%20include,integrated%20circuit%20(RF%20circuit).

PRACTICE QUESTIONS

QUES 1 . Consider the following communication Technologies: UPSC 2022

1 . Closed- Circuit Television

2 . Radio Frequency Identification

3 . Wireless Local area Network

Which of the above are considered short-range devices/technologies?

(a) 1 and 2 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

Show Answer