high-frequency radio direction finding
1Radio direction finder — Civil Air Patrol members practice using a handheld radio direction finder to locate an emergency locator transmitter …
2Direction finding — (DF) refers to the establishment of the direction from which a received signal was transmitted. This can refer to radio or other forms of wireless communication. By combining the direction information from two or more suitably spaced receivers… …
3Radio — is the transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light.Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of… …
4Radio-frequency identification — (RFID) is a technology that uses radio waves to transfer data from an electronic tag, called RFID tag or label, attached to an object, through a reader for the purpose of identifying and tracking the object. Some RFID tags can be read from… …
5direction finder — direction finding. Radio. a receiver with a loop antenna rotating on a vertical axis, used to ascertain the direction of incoming radio waves. [1910 15] * * * ▪ instrument or radio direction finder radio receiver and antenna system for… …
6Amateur radio — Amateur radio, often called ham radio, is both a hobby and a service in which participants, called hams, use various types of radio communications equipment to communicate with other radio amateurs for public service, recreation and self training …
7Intermediate frequency — In communications and electronic engineering, an intermediate frequency (IF) is a frequency to which a carrier frequency is shifted as an intermediate step in transmission or reception. The intermediate frequency is created by mixing the carrier… …
8Amateur radio in India — Infobox amateur radio country country=India caption=Amateur radio operators at a foxhunt in Mumbai licensed=16,000 license year=1913 itu region=3 itu zone1=41 itu zone2=49 cq zone1=22 cq zone2=26 itu rep=WPC iaru rep=ARSI callsign1=VUA to VWZ… …
9Radio-controlled aircraft — A radio controlled aircraft (often called RC aircraft or RC plane) is a model aircraft that is controlled remotely, typically with a hand held transmitter and a receiver within the craft. The receiver controls the corresponding servos that move… …
10Frequency (film) — Infobox Film name = Frequency image size = 200px caption = director = Gregory Hoblit producer = Gregory Hoblit Hawk Koch Toby Emmerich Bill Carraro writer = Toby Emmerich narrator = starring = Dennis Quaid James Caviezel Elizabeth Mitchell Andre… …
