Broadband Amplifier Gain Slope Equalization with a Single Passive Component

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  • Author: Alen Fejzuli, Ray Kaarsberg, and Nelson Roldan
With the new and increasing demand of the Internet and multimedia on the commercial side, and the broadband high data rate communications links on the aerospace and military side, RF and microwave amplifiers are being used in many broadband applications in the 2 to 20 GHz range. Gallium Arsenide (GaAs) monolithic microwave integrated circuit (MMIC) ampli-fiers lose gain with increasing temperature and increase in gain with decreasing temper-ature. The ratio of gain change/ºC tends to increase with frequency, making it difficult tocompensate the amplifiers in a chain and causing unwanted equalization effects. There are three variables which must be considered when designing GaAs amplifier lineups: gain, gain slope versus frequency, and gain varia-tion versus temperature.
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