Question
Which is the most common input and output impedance of MMICS?
Answer Options
- A) 50 ohms
- B) 300 ohms
- C) 450 ohms
- D) 75 ohms
Correct Answer: A
Explanation
MMICs (Monolithic Microwave Integrated Circuits) are specialized RF amplifiers and components designed for use in microwave systems. In these systems, where discrete components are impractical, all circuits must be designed to interface seamlessly with the characteristic impedance of the transmission lines used on the circuit board (microstrip, stripline).
The standardized characteristic impedance for nearly all RF and microwave communication, measurement, and test equipment (except broadcast and CATV) is 50 ohms. Therefore, MMICs are typically designed and optimized to have a matched input and output impedance of 50 ohms. This simplifies cascading multiple MMIC stages and connecting them directly to standard RF test equipment and coaxial cables.
This topic was automatically created to facilitate community discussion about this exam question. Feel free to share study tips, memory tricks, or additional explanations!