Reflector Antenna with Hat Feed
The Model
The reflector antenna is about 19 wavelengths in diameter. The antenna is excited by a TE11 circular waveguide mode. The antenna is depicted below.
  Figure 1: The corrugated sub reflector and the dielectric plug. |
 Figure 2: The reflector antenna with hat feed. |
 Figure 3: Cross section showing the reflector, the circular waveguide, the dielectric plug and the corrugated sub-reflector. |
Results
 Figure 4: Surface currents. |
Data for the reflector antenna with hat feed:
- Reflector diameter 250 mm (18.7 /lambda)
- MLFMM simulation including PEC and dielectrics
- The dielectric plug (teflon) /epsilonr = 2.08
- Port excitation
- CFIE =0.6
- SPAI pre-conditioner
- 180x361 far-field angles
- Convergence within 130 iterations
|
Simulation data
|
|
| Frequency |
22.4 GHz
|
| Total number of triangles |
56 700
|
| Total number of MM unknown |
87 000
|
| Time |
1.3 hours1
|
1/ 4 parallel processes on an Intel Core i5 quad-core 2.4 GHz processor with 8 Gb RAM
  Figure 5: Antenna diagram for E-plane (top) and H-plane (bottom). |