Parabolic Dish Antenna is designed using 3D Electromagnetic simulation tool at X-Band. FDTD simulation technique is used to realize this antenna. A horn is also modeled as feed network. This antenna is used in DTH system.

1. Parabolic Dish Antenna
EM Simulation
Anil Kumar Pandey

2. Parabolic dish designing parameters and simulation setup
Diameter- 1219 mm
Depth-203.2
Focus point - 457.2 mm
38 λ
6.5 λ
FDTD 3D Meshing
Sinusoidal waveform – 9.3 GHz

3. EM Simulation time – 35 min
Frequency - 9.3 GHz
Steady State
Plane wave focusing all energy at focal point
Plan Wave Source
Theta-90 deg
Phi- 90 deg

4. Point sensor-edge1
Point sensor-focal
Point sensor-edge2
Result Verification: Electric Filed data at Focal Line (Plane wave)

5. Steady State
Second Analysis : Same design with True Parabola both side
Feed through rectangular Horn placed at parabolic focal point

6. • Antenna pattern is not smooth due
to FDTD meshing
• If FDTD mesh is not very fine,
pattern will not be smooth as in dish
and reflector antenna ‘surface
roughness ‘ of reflector play
important role
• Antenna Gain is ~ 20 dBi
Dish Antenna Gain

7. Steady State
Point sensor-edge1
Point sensor-edge2
Result Verification: Electric Filed data at Focal Line

8. Dish Feed : Horn Performance
Frequency : 9.3 GHz
Gain – 12 DBi