Question
What is the principle of a Method of Moments analysis?
Answer Options
- A) A wire is modeled as a series of segments, each having a uniform value of current
- B) A wire is modeled as a single sine-wave current generator
- C) A wire is modeled as a single sine-wave voltage source
- D) A wire is modeled as a series of segments, each having a distinct value of voltage across it
Correct Answer: A
Explanation
The Method of Moments (MoM) is the numerical technique used by antenna modeling software to solve the complex equations for current and field distribution on wire antennas. For the calculation to be manageable by a computer, the continuous physical antenna must be approximated by discrete electrical sections.
The principle of a MoM analysis is that a wire is modeled as a series of segments, each having a uniform value of current. The program then calculates the interaction between all these segments (hence ‘moments’) to determine the total radiation, mutual coupling, and final impedance of the entire antenna structure.
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