Question
In what application is gallium arsenide used as a semiconductor material?
Answer Options
- A) In high-current rectifier circuits
- B) In high-power audio circuits
- C) In microwave circuits
- D) In very low-frequency RF circuits
Correct Answer: C
Explanation
Gallium Arsenide (GaAs) is a compound semiconductor material that possesses characteristics superior to silicon, particularly concerning the speed at which electrons can move through it (electron mobility). This high mobility allows devices made from GaAs to switch and amplify signals at much higher frequencies than silicon-based components.
Because of its high electron mobility and inherent stability at elevated temperatures, Gallium Arsenide is widely used in microwave circuits and satellite communication equipment. It is the preferred material for manufacturing MMICs (Monolithic Microwave Integrated Circuits), low-noise amplifiers (LNAs), and power amplifiers operating in the UHF, microwave, and millimeter-wave ranges.
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