NEC2 antenna models
- 14 dBi short-backfire - sbfa.nec.txt.
4:1 slot-fed balun should be used to feed the dipole. To simulate antenna with
feed network Zeland software's IE3D should
be used. Search the web for construction details of this antenna.
- 11 dBi biquad - biquad.nec.txt. 34 dB
front to back ratio, 60 degrees H-plane, 50 degrees E-plane half power
beamwidth.
- 11 dBi log periodic - lpda.nec.txt. 27 dB
front to back ratio, 70 degrees H-plane, 50 degrees E-plane half power
beamwidth. Feed like this is used in California Amplifier 24 dBi parabolic grid
antennas. I used this photo to model the
original California Amplifier quasi log periodic feed -
lpda_calamp.nec.txt.
- Horn - horn.nec.txt. I was just doing some
measurements for offset dish feed. Horn apperture is not modeled correctly
(you can see that clearly with latest version of 4NEC2 as it now displays
surface patches). NEC2 is not very good at horn simulation. I use
Zeland software's Fidelity.
- 11.5 dBi helical - helix.nec.txt.
