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Python Antenna Simulation Module (nec2++) C-style interface

Project description

This module allows you to do antenna simulations in Python using the nec2++ antenna simulation package. This is a wrapper using SWIG of the C interface, so the syntax is quite simple. Have a look at the file, for an example of how this library can be used.

Tim Molteno.


As of version swig is no longer required for installation. Simply use PIP as follows:

pip install necpp


The following code calculates the impedance of a simple vertical monopole antenna over a perfect ground.

import necpp

def handle_nec(result):
if (result != 0):
print necpp.nec_error_message()

def impedance(frequency, z0, height):

nec = necpp.nec_create() handle_nec(necpp.nec_wire(nec, 1, 17, 0, 0, z0, 0, 0, z0+height, 0.1, 1, 1)) handle_nec(necpp.nec_geometry_complete(nec, 1, 0)) handle_nec(necpp.nec_gn_card(nec, 1, 0, 0, 0, 0, 0, 0, 0)) handle_nec(necpp.nec_fr_card(nec, 0, 1, frequency, 0)) handle_nec(necpp.nec_ex_card(nec, 0, 0, 1, 0, 1.0, 0, 0, 0, 0, 0)) handle_nec(necpp.nec_rp_card(nec, 0, 90, 1, 0,5,0,0, 0, 90, 1, 0, 0, 0)) result_index = 0

z = complex(necpp.nec_impedance_real(nec,result_index),

necpp.nec_delete(nec) return z

if (__name__ == ‘main’):
z = impedance(frequency = 34.5, z0 = 0.5, height = 4.0) print “Impedance t(%6.1f,%+6.1fI) Ohms” % (z.real, z.imag)

More Information

Have a look at [] for more information on using nec2++.

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