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Als Sendeelektronik bezeichnet man den Tei … Als Sendeelektronik bezeichnet man den Teil von Funksystemen, welche die zur Speisung von Sendeantennen erforderliche hochfrequente Spannung erzeugen. Sie unterscheiden sich von anderen elektronischen Systemen mit hochfrequenten elektrischen Spannungen durch die höhere Ausgangsleistung ab ca. 1 Watt, welche erforderlich ist, um das Funksignal mittels einer Antenne über größere Entfernungen zu übertragen. Ein Gegenbeispiel wäre die Zwischenfrequenzstufe in Rundfunkempfängern, die nur Leistungen im Milliwattbereich erzeugt.ur Leistungen im Milliwattbereich erzeugt.
, A radio transmitter or just transmitter is … A radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna. Radio waves are electromagnetic waves with frequencies between about 30 Hz and 300 GHz. The transmitter itself generates a radio frequency alternating current, which is applied to the antenna. When excited by this alternating current, the antenna radiates radio waves. Transmitters are necessary parts of all systems that use radio: radio and television broadcasting, cell phones, wireless networks, radar, two way radios like walkie talkies, radio navigation systems like GPS, remote entry systems, among numerous other uses. A transmitter can be a separate piece of equipment, or an electronic circuit within another device. Most transmitters consist of an electronic oscillator which generates an oscillating carrier wave, a modulator which impresses an information bearing modulation signal on the carrier, and an amplifier which increases the power of the signal. To prevent interference between different users of the radio spectrum, transmitters are strictly regulated by national radio laws, and are restricted to certain frequencies and power levels, depending on use. The design must usually be type approved before sale. An important legal requirement is that the circuit does not radiate significant radio wave power outside its assigned frequency band, called spurious emission. frequency band, called spurious emission.
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| rdfs:comment |
Als Sendeelektronik bezeichnet man den Tei … Als Sendeelektronik bezeichnet man den Teil von Funksystemen, welche die zur Speisung von Sendeantennen erforderliche hochfrequente Spannung erzeugen. Sie unterscheiden sich von anderen elektronischen Systemen mit hochfrequenten elektrischen Spannungen durch die höhere Ausgangsleistung ab ca. 1 Watt, welche erforderlich ist, um das Funksignal mittels einer Antenne über größere Entfernungen zu übertragen. Ein Gegenbeispiel wäre die Zwischenfrequenzstufe in Rundfunkempfängern, die nur Leistungen im Milliwattbereich erzeugt.ur Leistungen im Milliwattbereich erzeugt.
, A radio transmitter or just transmitter is … A radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna. Radio waves are electromagnetic waves with frequencies between about 30 Hz and 300 GHz. The transmitter itself generates a radio frequency alternating current, which is applied to the antenna. When excited by this alternating current, the antenna radiates radio waves. Transmitters are necessary parts of all systems that use radio: radio and television broadcasting, cell phones, wireless networks, radar, two way radios like walkie talkies, radio navigation systems like GPS, remote entry systems, among numerous other uses. entry systems, among numerous other uses.
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Radio transmitter design
, Sendeelektronik
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