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The most widely used types of feed line are coaxial cable, twin-lead, ladder line, and at microwave frequencies, waveguide. Particularly with a transmitting antenna, the feed line is a critical component that must be adjusted to work correctly with the antenna and transmitter. Each type of transmission line has a specific characteristic impedance.
An antenna tuner, a matchbox, transmatch, antenna tuning unit (ATU), antenna coupler, or feedline coupler is a device connected between a radio transmitter or receiver and its antenna to improve power transfer between them by matching the impedance of the radio to the antenna's feedline. Antenna tuners are particularly important for use with ...
The box needed to output radio frequency signals (compatible with a television's antenna input), composite video, and stereo audio. It had to include a remote control, and be compatible with universal remotes. The units had to support both a 4:3 center crop of a 16:9 transmitted image, and a letterboxed rendition of a 16:9 transmitted image.
If you’re using the set-top box/cable receiver box, you’re paying $12.99 per month for single DVR service or $19.99 to $39.99 per month for multiple DVR service. Yearly cost: Cable box DVR ...
The radio frequency current from the transmitter is supplied to the antenna through a cable called the feedline.The antenna tuning hut contains a matching network made of high wattage capacitors and inductors (coils) that in combination match the antenna's impedance to the feedline, to efficiently transfer power into the antenna.
In radio engineering, a feeder connects radio equipment to an antenna, usually open wire (air-insulated wire line) or twin-lead from a shortwave transmitter. In power engineering , a feeder line is part of an electric distribution network , usually a radial circuit of intermediate voltage.