RF Amplifier
A tuned amplifier that amplifies the high-frequency signals commonly used in radio communications. The frequency at which maximum gain occurs in a radio-frequency (RF) amplifier is made variable by changing either the capacitance or the inductance of the tuned circuit. A typical application is the amplification of the signal received from an antenna before it is mixed with a local oscillator signal in the first detector of a radio receiver. The amplifier that follows the first detector is a special type of RF amplifier known as an intermediate-frequency (i-f) amplifier.
An RF amplifier is distinguished by its ability to tune over the desired range of input frequencies. The shunt capacitance, which adversely affects the gain of a resistance-capacitance coupled amplifier, becomes a part of the tuning capacitance in the rf amplifier, thus permitting high gain at radio frequencies. The power gain of an rf amplifier is always limited at high radio frequencies, however.
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| ENI 550L Ultra High Frequency RF Amplifier | Covering the frequency range between 1 to 500 MHz, the four units that make up the "500" Series amplifiers range in linear power output from 3 to 100 Watts.
The Model 550L and 5100L cover the frequency range of 1.5 to 400 MHz with a flat... View Details >>
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