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2. Antenna (radio) - Wikipedia

   en.wikipedia.org/wiki/Antenna_(radio)

   In transmission, a radio transmitter supplies an electric current to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic waves (radio waves). In reception , an antenna intercepts some of the power of a radio wave in order to produce an electric current at its terminals, that is applied to a receiver ...

3. Antenna types - Wikipedia

   en.wikipedia.org/wiki/Antenna_types

   Antennas can be classified in various ways, and various writers organize the different aspects of antennas with different priorities, depending on whether their text is most focused on specific frequency bands; or antenna size, construction, and placement feasibility; or explicating principles of radio theory and engineering that underlie ...

4. List of RF connector types - Wikipedia

   en.wikipedia.org/wiki/List_of_RF_connector_types

   Belling-Lee connector, also called IEC 61169-2 connector, used throughout Europe and Australia, as well as parts of South-East Asia, for domestic television and FM radio antenna cabling; BNC connector (Bayonet Neill-Concelman). (IEC 61169-8 and IEC 61169-63) C-type connector (Concelman)

5. Very high frequency - Wikipedia

   en.wikipedia.org/wiki/Very_high_frequency

   Common uses for radio waves in the VHF band are Digital Audio Broadcasting (DAB) and FM radio broadcasting, television broadcasting, two-way land mobile radio systems (emergency, business, private use and military), long range data communication up to several tens of kilometers with radio modems, amateur radio, and marine communications.

6. Radio masts and towers - Wikipedia

   en.wikipedia.org/wiki/Radio_masts_and_towers

   A mast radiator or mast antenna is a radio tower or mast in which the whole structure is an antenna. Mast antennas are the transmitting antennas typical for long or medium wave broadcasting. Structurally, the only difference is that some mast radiators require the mast base to be insulated from the ground.

7. Radio spectrum - Wikipedia

   en.wikipedia.org/wiki/Radio_spectrum

   The lowest frequencies used for radio communication are limited by the increasing size of transmitting antennas required. [6] The size of antenna required to radiate radio power efficiently increases in proportion to wavelength or inversely with frequency. Below about 10 kHz (a wavelength of 30 km), elevated wire antennas kilometers in diameter ...