ITU-R F1245 Antenna
An antenna pattern modeled on equations given in ITU-R F.1245.
This antenna uses a polar coordinate system.
| Parameter | Description |
|---|---|
| Design Frequency |
This is the frequency of the antenna. The antenna design frequency is independent of the operational frequency of a transmitter, receiver, or radar. Changing the frequency of a transmitter, receiver, or radar does not update an embedded antenna's design frequency, nor vice versa. The design frequency is solely used at antenna configuration time to compute the antenna size from its max gain or beamwidth settings. A mismatch between signal frequency and antenna design frequency typically causes performance degradation. |
| Main-lobe Gain | The maximum gain of the main lobe of the antenna pattern. |
| Efficiency | The aperture efficiency of the antenna. This value accounts for all the losses between the incident wavefront and the output of the antenna. This field is not required by the ITU-R recommendations. Yet, it is provided for consistency with other antenna types and to help account for any antenna losses. By default, the efficiency is set to a value of 100% or zero loss. |
| Diameter | Diameter of the dish. |
| Polarization Advantage | The antenna mask takes into account the polarization advantage from the mainbeam-to-mainbeam coupling of a linearly polarized comm system with a circularly polarized system. Enabled for the F1245 antenna mask when the computed D/ is less than 100. |