470-800 MHZ dipole antenna design using 4nec2 software tools

470-800 MHZ is television reception band frequency , so we calculate  Center frequency = 635 MHZ

Enter this centre frequency to the Geometry calculation 4nec2 software :

f

0.472 meter is lambda/2 for 635 MHz according to software .
0.009 is radius of wire in meter , equal to 9 mm pipe radius, made from copper
then calculate the formula by clicking F7 or go to calculate menu, then click NEC output data. The result is :

SWR still high 10.3 , we must re calculate for finding the best SWR, SWR wanted between 1.1 until 3 . And this is only sample for designing using 4NEC2 software for dipole antenna.
The Power output antenna also 3.94 dBi and the pattern antenna shows beside Main windows calculation.

This is 2D view of antenna with current propagation

This is 3D view of antenna pattern , with x,y,z cartesian  with Power maximum at 3.87 dBi

3D view of antenna Zoom in

3D view of Vertical Gain calculation antenna

Current View of Antenna with Hide Pattern in Horizontal Propagation

3D Multicolor view of antenna with current propagation

3D Horizontal Gain with Current propagation in Horizontal view

2D Slices with horizontal current

Vertical gain antenna with current pattern

Vertical gain antenna with current propagation,