Radio astronomy and radar systems often use dielectric lenses, commonly called a lens antenna to refract electromagnetic radiation into a collector antenna.

** Radio antenna moved to embedded windshield wire.

Radio signals broadcast from a single antenna will spread out in all directions, and likewise a single antenna will receive signals equally from all directions.

That said, it is also used in the Radio Frequency ( RF ) regime for cases in which the antenna is operating in the so-called optical region and is likewise very large relative to a wavelength.

Category: Radio frequency antenna types

Category: Radio frequency antenna types

Category: Radio frequency antenna types

Category: Radio frequency antenna types

Category: Radio frequency antenna types

Simultaneous electrical scanning in both azimuth and elevation was first demonstrated in a phased array antenna at Hughes Aircraft Company, Culver City, CA, in 1957 ( see Joseph Spradley, “ A Volumetric Electrically Scanned Two-Dimensional Microwave Antenna Array ,” IRE National Convention Record, Part I-Antennas and Propagation ; Microwaves, New York: The Institute of Radio Engineers, 1958, 204-212 ).

Category: Radio frequency antenna types

Category: Radio frequency antenna types

* In a radar, a waveguide transfers Radio Frequency energy to and from the antenna, where the impedance needs to be matched for efficient power transmission ( see below ).

Category: Radio frequency antenna types

* Radio antenna

Category: Radio frequency antenna types

Radio transmission was on 108. 06 MHz, a standard frequency used by satellites in the International Geophysical Year, through an electric dipole antenna for telemetry and doppler information and a magnetic dipole antenna for the television system.

Radio transmission was at 108. 06 MHz through a magnetic dipole antenna for the television system, telemetry, and doppler.

Radio transmission was at on 108. 06 MHz through an electric dipole antenna for telemetry and doppler information at 300 mW and a magnetic dipole antenna for the television system at 50 W. Ground commands were received through the electric dipole antenna at 115 MHz.

World War II was unkind to Radio Row, and in 1944 the Times lamented that the " one-time repository of nearly everything from a tube socket to a complete radio station " was " bargainless and practically setless, too, due to wartime scarcities " but that it still catered to " tinkerers and engineers " and that an " old spirit " and " magical quality " were still there.

A well-known example among radio engineers was the Boonton Radio Co., located in nearby Rockaway, which manufactured a high-quality test instrument known as a Q meter, still used by hobbyists today.

Radio and television engineers often had difficulty compensating for the sound of Scully's play-by-play reverberating through the stands at Dodger home games.

Following the biggest closedown of the pirates in Ireland in 1988, and the subsequent legalisation of local radio services in the country, many people viewed that the pirate era was consigned to the past, and Limerick became home to a single government-licensed service called Radio Limerick One which ironically later had its broadcasting licence revoked only to continue operating as a pirate station ( RLO ) for 10 years, being constantly raided and fined, finally ceasing transmission after 10 years early 2007 as owners and engineers ventured to other projects.

When engineers enabled Britain Radio to begin broadcasting at the same time as SRE, it was because they had lowered the power of its transmitter and used a new but inferior frequency ( 1322 kHz / 227 m ).

The American Institute of Electrical Engineers was a United States based organization of electrical engineers that existed between 1884 and 1963, when it merged with the Institute of Radio Engineers ( IRE ) to form the Institute of Electrical and Electronics Engineers ( IEEE ).

One of his Texas engineers called XERA " the world's most powerful broadcasting station ," which was a slogan that he would use again in the 1960s for two more of his engineering endeavors: the United States military transmitters which communicated with the U. S. submarine fleet, and again for the offshore pirate station Swinging Radio England.

Cape Cod Radio Mystery Theater ( CCRMT ) is a group of voice actors and engineers committed to reviving the art of radio drama.

With domestic news, the correspondent first records a " generic minute " summary ( for use by all stations and channels ) and then priority is to report on BBC Radio 5 Live, then on the BBC News Channel and any other programmes that are on air.

In June 2006, newspaper allegations of crack cocaine use resulted in Charles being suspended from both Coronation Street and BBC Radio 6 Music.

A broadcaster may opt to use a standard-definition ( SDTV ) digital signal instead of an HDTV signal, because current convention allows the bandwidth of a DTV channel ( or " multiplex ") to be subdivided into multiple digital subchannels, ( similar to what most FM radio stations offer with HD Radio ), providing multiple feeds of entirely different television programming on the same channel.

Other interoperability profiles exist in the DECT suite of standards, and in particular the DPRS ( DECT Packet Radio Services ) bring together a number of prior interoperability profiles for the use of DECT as a wireless LAN and wireless internet access service.

In 1947, he claims to have become the first DJ to use twin turntables for continuous play, and in 1958 became a radio DJ at Radio Luxembourg.

In the summer of 1924, the American Radio Relay League adopted Esperanto as its official international auxiliary language, and hoped that the language would be used by radio amateurs in international communications, but its actual use for radio communications was negligible.

Radio fax is still in common use today for transmitting weather charts and information to ships at sea.

* 1927 – President Calvin Coolidge signs a bill by Congress establishing the Federal Radio Commission ( later replaced by the Federal Communications Commission ) which was to regulate the use of radio frequencies in the United States.

Gernsback, who edited Radio News until 1929, made use of the magazine to promote his own interests, including having his radio station ’ s call letters on the cover starting in 1925.

Richmond Hill was decommissioned after the close of 405 line broadcasts, although the 200ft tower remained in use for radio with Manx Radio transmitting on 96. 9 MHz and then 97. 3 MHz until 1989.

BBC Radio 3 commonly makes use of three ISDN BRIs to carry 320 kbit / s audio stream for live outside broadcasts.

Radio and submillimeter telescopes use much larger dishes or antennae, which do not have to be made as precisely as the mirrors used in optical telescopes.

After investigation and a petition to the FCC, Part 12 was amended, in March 1956, to allow Amateur Radio Operators to use any shift that was less than 900 hertz.

The FCC approved the use of ASCII by Amateur Radio stations on March 17, 1980 with speeds up to 300 baud from 3. 5 to 21. 25 MHz and 1200 baud between 28 and 225 MHz.

Radio transmitters may also use a mixer stage to produce an output frequency, working more or less as the reverse of a superheterodyne receiver.

Expected to make use of devices with which listeners could press a button to indicate whether they liked or disliked a particular piece of music, Adorno bristled with distaste and astonishment: “ I reflected that culture was simply the condition that precluded a mentality that tried to measure it .” Thus Adorno suggested using individual interviews to determine listener reactions and, only three months after meeting Lasarzfeld, completed a 160-page memorandum on the Project ’ s topic, “ Music in Radio .” Adorno was primarily interested in how the musical material was affected by its distribution through the medium of radio and thought it imperative to understand how music was affected by its becoming part of daily life.

* February 23 – The U. S. Federal Radio Commission ( later renamed the Federal Communications Commission ) begins to regulate the use of radio frequencies.

Organizations known to use ALE for Emergency management, disaster relief, ordinary communication or extraordinary situation response include: Red Cross, FEMA, Disaster Medical Assistance Teams, NATO, Federal Bureau of Investigation, United Nations, AT & T, Civil Air Patrol, SHARES, State of California Emergency Management Agency ( CalEMA ), other US States ' Offices of Emergency Services or Emergency Management Agencies, and Amateur Radio Emergency Service ( ARES ).

International amateur radio ALE High Frequency channels are frequency coordinated with all Regions of the International Amateur Radio Union ( IARU entity of ITU ), for international, regional, national, and local use in the Amateur Radio Service.

All Amateur Radio ALE channels use " USB " Upper Sideband standard.

Family Radio Service ( FRS ) and PMR446 radios often use a number of different CTCSS tones, usually erroneously called " sub-channels " ( the actual number of tones depends on the manufacturer ).

International broadcasters agreed in 1985 to also use SSBSC entirely by 2015, though IBOC and IBAC digital radio ( namely Digital Radio Mondiale ) seems likely to make this irrelevant.