The main innovations relate to the use of active antennae, miniaturization of radioelectric functions and the introduction of new frequency bands

Radio could carry sound without wires.

The way we transmit wireless data is by using electromagnetic waves in particular, radio waves.

Radio

Radio waves. There's another thing.

And radio waves are limited.

Towers for microwave line

These radio waves penetrate through walls.

We use them to communicate, cook, and diagnose and cure disease. The unified theory of electromagnetism has led to profound advances across all physical science, from atomic physics (where lasers and masers are essential tools) to cosmology (where the microwave background radiation is our window on the Big Bang).

Link, microwave

They had 53 television and 61 radio transmitters, including 49 ultra short radio wave transmitters.

Heinrich Hertz, when he discovered radio waves in 1887, he called them radio waves because they radiated.

Current activities include design, production and application of various microwave and millimetre wave instrumentations and techniques, for example, scatterometer, radiometer, Doppler radar, a millimetre waves radio telescope, sensitive radio receivers design and component productions basic element and material studies for vegetation canopy modelling and millimetre wave tomography.

Transceiver link, digital (microwave link)

39. The need for an accurate determination of the diffuse radio and microwave emission from the galactic disk was highlighted by the limitations imposed on cosmic microwave background (CMB) data because of galactic foreground emission.

We soon tune in to Ivan's wave length.

Digital microwave link, 2 Mbps

Alarm unit Microwave supply battery charger

What's the point of these radio waves that you've found?

Table Cost of direct short wave radio broadcasting for the biennium 2000 2001

These result in electromagnetic radiation ranging from radio waves to X rays, high energy protons and changes in the interplanetary solar winds.

And then we have the radio waves, they have the issues I've just mentioned.

Only visible light and radio waves from the cosmos can be detected at sea level.

Microwave analog and channels

Jansky had made a historic discovery, that celestial objects could emit radio waves as well as light waves.

News and magazine programmes are also distributed via telephone lines and radio circuits for shortwave rebroadcast by regional broadcasters.

They are commercially used in secondary batteries and coatings for shielding against radio frequency and electromagnetic interference.

(c) A radio science payload this includes X and K band transponders and an accelerometer

Hafun's only communication to the outside world is through short wave radio.

Operation of telephone and telegraph radiocommunications system and transmission of radio programmes.

Operation of telephone and telegraph radio communications system and transmission of television and radio programmes

Base radio station, transceiver receiver

Message from our planes

Is it a radio?

The communications package includes an S band downlink and amateur radio store and forward communications with an audio repeater to stimulate radio interest among schoolchildren.

D Dining room 71 Disabled, facilities

Radio

Radio workshop power tools

Seven powerful, 13 low powered and two medium wave State radio and television stations operated in Lithuania.

Cisco Radio Tower

B. Radiocommunications

(a) Radiolocation

1. Radiocommunication

(b) Radiolocation

Mobile radio