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Ohmic Resistance Formula:
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Ohmic resistance is the material's opposition to the flow of electric current. In antenna systems, it represents the actual electrical resistance that causes power loss in the form of heat.
The calculator uses the Ohmic Resistance formula:
Where:
Explanation: The total resistance of an antenna consists of both radiation resistance (which accounts for power radiated as electromagnetic waves) and ohmic resistance (which accounts for power lost as heat).
Details: Calculating ohmic resistance is crucial for determining antenna efficiency, optimizing power transfer, and minimizing energy losses in RF systems.
Tips: Enter total antenna resistance and radiation resistance in Ohms. Both values must be positive, and total resistance should be greater than or equal to radiation resistance.
Q1: What is the difference between ohmic resistance and radiation resistance?
A: Ohmic resistance causes power loss as heat, while radiation resistance represents the resistance that accounts for power radiated as electromagnetic waves.
Q2: Why is it important to minimize ohmic resistance in antennas?
A: Minimizing ohmic resistance increases antenna efficiency by reducing power losses and maximizing the amount of power that is actually radiated.
Q3: What factors affect ohmic resistance in antennas?
A: Conductor material, cross-sectional area, length, temperature, and frequency all affect the ohmic resistance of an antenna.
Q4: How does ohmic resistance relate to antenna efficiency?
A: Antenna efficiency = Radiation Resistance / (Radiation Resistance + Ohmic Resistance). Lower ohmic resistance means higher efficiency.
Q5: Can ohmic resistance be completely eliminated?
A: No, all real conductors have some ohmic resistance, but it can be minimized through proper material selection and design optimization.