The transmitter would be located in geostationary orbit ~35,000 km away from the receiver, so spread due to diffraction becomes significant. With 6.7 GW of tran

The transmitter would be located in geostationary orbit ~35,000 km away from the receiver, so spread due to diffraction becomes significant. With 6.7 GW of transmitted power at 2.45 GHz, ~790 MW ends up in the side lobes[0]. So it is reasonable expect RF interference not only near the receiver, but thousands of kilometers away from it. Figure 55 in [0] shows a plot of incident power with distance from the receiver. As this spread is due to diffraction, the only way to lessen it using the same frequency is to build the transmitter larger. In the case considered here, the transmit aperture was already 1 km. [0]https://ieeexplore.ieee.org/document/9318744 https://ieeexplore.ieee.org/document/9318744