The center frequency chosen for the microwave power transmission is 24.125GHz. This frequency was chosen to minimize atmospheric attenuation and also to minimize the dish and array diameters.
Dish Antenna Loss
- Polarization Inefficiency: 100% for circular (no polarization losses)
- Aberrations
- Surface Roughness (σ h > λ / 8) = 1.55mm
- Ohmic Losses
- Spill-over Losses
Figure G4. Matlab code for Ground Collector Antenna Design
Atmospheric Loss
- Conductivity
- Gas Absorption
- Rain Attenuation (see website 6) 0dB
- Cloud Attenuation 1dB
Energy Conversion Loss
- Microwave-to-DC (Charge Pump)
- DC-to-Microwave (Magnetron)
Friis (dB)
Pr = Pt + Gt + Gr + 20 log (λ / 4 π)- 20 log (r) - Other Losses
Other losses = 9.6dB
Pr = 6.251 GW
Other losses = 9.6dB
Pr = 6.251 GW
Matlab code output: The power received must be 6.251 Gigawatts for the given parameters.
