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A radio-frequency power amplifier (RF power amplifier) is a type of electronic amplifier that converts a low-power radio-frequency (RF) signal into a higher-power signal. [1] Typically, RF power amplifiers are used in the final stage of a radio transmitter , their output driving the antenna .
The inductive output tube (IOT) or klystrode is a variety of linear-beam vacuum tube, similar to a klystron, used as a power amplifier for high frequency radio waves. It evolved in the 1980s to meet increasing efficiency requirements for high-power RF amplifiers in radio transmitters. [ 1 ]
MILMEGA is a company specializing in designing and manufacturing high-power amplifiers for electromagnetic compatibility (EMC) testing. [1] Headquartered in Ryde on the Isle of Wight in England, MILMEGA mainly provides broadband amplifier products with frequency ranges from 80 MHz to 8 GHz , [ 2 ] with power levels from 30W - 1kW .
Eitel/McCullough and other manufacturers of high power RF tubes use the following code since 1945: [2] An initial digit denoting the number of electrodes: 2 – Diode; 3 – Triode; 4 – Tetrode; 5 – Pentode; Up to 2 letters denoting the construction type and the cooling method: R or a dash ("-") – Glass envelope, radiation cooling; C ...
The bandwidth of a broadband TWTA can be as high as one octave, [citation needed] although tuned (narrowband) versions exist; operating frequencies range from 300 MHz to 50 GHz. A TWTA consists of a traveling-wave tube coupled with its protection circuits (as in klystron ) and regulated power supply electronic power conditioner (EPC), which may ...
It could generate 200 W of power at a wavelength of 40 centimeters (750 MHz) with 50% efficiency. The klystron was the first significantly powerful source of radio waves in the microwave range; before its invention the only sources were the Barkhausen–Kurz tube and split-anode magnetron, which were limited to
A crossed-field amplifier (CFA) is a specialized vacuum tube, first introduced in the mid-1950s and frequently used as a microwave amplifier in very-high-power transmitters. Raytheon engineer William C. Brown 's work to adapt magnetron principles to create a new broadband amplifier is generally recognized as the first CFA, which he called an ...
A valve RF amplifier (UK and Aus.) or tube amplifier is a device for electrically amplifying the power of an electrical radio frequency signal. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers during the 1960s and 1970s, initially for receivers and low power stages of ...
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