### Magellan Spacecraft Simulation

**Introduction**

This application demonstrates combination of MoM and physical optics approach (PO) on simulations of electrically large problems. Magellan spacecraft is fed by horn pattern at frequency 3 GHz. Simulations are performed using PO solution.

**Simulation Workflow**

- At the first step, far field pattern of a horn antenna is accurately modeled with MoM
- On the second step, far field pattern of the horn antenna is used as a specialized incident field source, and calculation of the currents on spacecraft geometry is done using PO approach
- On the third step, spacecraft is calculated and analyzed

**Magellan Spacecraft Geometry**

- Number of triangles 63,793
- Magellan spacecraft length is 35.2 m
- Magellan spacecraft width is 15 m

**Design of Horn Antenna**

The optimum parameters of the horn antenna for parabolic reflector were chosen. These parameters depend on ratio of parabolic reflector focus to diameter, which is 0.93.

**Computational Model of Horn Antenna**

**Results**

Current distribution on Magellan spacecraft is shown below for 3 GHz frequency;

**References**

- F.G. Bogdanov, R.G. Jobava, D.D. Karkashadze, I.S. Oganezova SATELLITE ANTENNA SIMULATIONS USING COMBINATION OF INTEGRAL EQUATIONS AND PHYSICAL OPTICS APPROACHES (International Scientific Conference ‘Advanced Lightweight Structures and Reflector Antennas’)