Article

How to select a suitable antenna for your project?

Jackie Dong

How to select a suitable antenna for your project?

For few customers that plan to build new earth stations, they have no idea of how to choose a suitable antenna, what they need to prepare for the project implementation?

Usually for first step, the antenna user should consult the satellite operator, who will suggest you the antenna diameter.

ANTENNA SPECIFICATIONS

In order to select the optimum antenna for a given earth station, it is necessary to establish a number of important parameters; e.g.:

Electrical Specifications:

1. Frequency range

2. Polarization

3. Elevation plane radiation pattern, location of beam maximum (take-off angle) and upper and lower half power points.

4. Azimuth plane beamwidth

5. Side-lobe level and front to back ratio

6. Gain

7. Feedpoint impedance

8. VSWR with respect to feedpoint

9. Power handling capability (peak and average)

Mechanical Specifications:

1. Wind speed

2. Ice loading

3. Presence of corrosive atmosphere

4. Soil conditions (load bearing capability and density)

5. Land area requirements - limitations

6. Tower height

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