Wireless.
Ionosphere
Electric current is a transmission medium which can be used to transfer data across a wire for example ( copper wires). Radio waves is a transmission medium which can be used to carry data through the air. The above mention mediums are known as data transmission media.
Radio transmission occurs when sound or pictures are changed into waves and transmitted. Radio waves are then sent to receivers. The more powerful that a signal is, the further the signal will travel
Radio waves are in all parts of the atmosphere. Some, but not all, radio waves are reflected from the ionosphere, permitting transmission over greater distances.
Radio stations use a broadcasting antenna to transmit electromagnetic waves at literally hundreds of thousands of watts. This transmission is modulated, (tuned), at a specific frequency between 87 and 108 Mhz.
Physical Media Twisted-Pair Cable Coaxial Cable Fiber-Optic Cable Wireless Media Broadcast Radio Cellular Radio Microwaves Communication Satellite
radio waves or radio frequency
Most of these networks use radio waves for their transmission medium, but some use infrared light waves
signal transmitted from transmitter to rfecevier is known as media transmission media divided in to two types guided unguided Transmission Media: All network nodes (computers and peripherals) are connected to each other and to the network by transmission media. A transmission medium establishes a communications channel between the nodes on a network and can take several forms: a. Networks can use existing wiring such as power lines b. Networks canuse additional cable to connect nodes c. Wireless networks use radio waves instead of wires or cable to connect nodes.
Most of these networks use radio waves for their transmission medium, but some use infrared light waves
Radio LinksThe physical layer transmits signals in form of radio waves.
There are different types of unguided media. Some of them include radio waves, infrared waves and micro waves. This is commonly referred to wireless media.
In short: no. A transmission media is a material substance (solid, liquid or gas) through which energy waves can travel. For example, the transmission medium for sound received by the ears is usually air, but solids and liquids may also act as transmission media for sound.It can also refer to the technical device which employs the material substance to transmit or guide the waves. Thus an optical fiber or a copper cable can be referred to as a transmission medium.Microwaves are a form of electromagnetic energy, similar to radio waves. Whatever microwaves travel through (i.e.: the air) is the transmission media.
Radio, is the transmission and reception of electromagnetic waves. It can also be the name given to the media industry that sprung up as a result of radio entertainment. e.g. "They got a job in radio". The first practical means of using radio waves to communicate, was done by an Italian Gugliemo Marconi and he took out a British patent in 1897.
Wired transmission media is media used to transfer information over a network, such as Twisted Pair cable. This is opposed to wireless transmission media which uses radio waves to transmit information. There are many types of wired transmission media such as coaxial cable, telephone lines, etc. Basically any form of wire used to transmit information over a network is considered a wired transmission media.
The analog method of signal transmission uses radio waves to carry signals. Digital transmission involves the use of satellites to transmit signals.
Radio Waves