Home
Back
Antenna Gain Formula:
| From: | To: |
Antenna Gain is the maximum power gained by an antenna. It represents how well the antenna converts input power into radio waves in a specific direction compared to an idealized isotropic radiator.
The calculator uses the Antenna Gain formula:
Where:
Explanation: The formula calculates the ratio of radiation intensity in a specific direction to the radiation intensity of an isotropic radiator radiating the same total power.
Details: Accurate antenna gain calculation is crucial for designing efficient communication systems, optimizing signal strength, and ensuring proper antenna performance in various applications.
Tips: Enter radiation intensity and isotropic radiation intensity in Watt per Steradian. Both values must be valid and greater than zero.
Q1: What is the difference between antenna gain and directivity?
A: Antenna gain accounts for both the directional capabilities and efficiency of the antenna, while directivity only considers the directional pattern.
Q2: What are typical antenna gain values?
A: Gain values vary widely depending on antenna type, ranging from negative values for lossy antennas to 20+ dBi for high-gain directional antennas.
Q3: How is antenna gain measured in practice?
A: Antenna gain is typically measured using comparative methods against reference antennas in anechoic chambers or through far-field measurements.
Q4: What factors affect antenna gain?
A: Antenna size, shape, design, operating frequency, and construction materials all significantly impact the antenna's gain characteristics.
Q5: Why is isotropic radiation intensity used as a reference?
A: An isotropic radiator provides a theoretical uniform radiation pattern in all directions, serving as a standard reference for comparing antenna performance.