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FEKO LITE

What is FEKO LITE?

FEKO LITE is a free, fully featured version of FEKO, but with limitations on the size of problem that can be solved (listed below).  FEKO LITE is ideally suited to forming part of under-graduate courses on EM engineering (EM theory, antenna design, etc.). Antenna models can be created very quickly within the powerful GUI; exposing students to CAD concepts along the way. Alternatively, instructors could provide students with parametrised models which they can then easily experiment with, in order to gain insight into the course work at hand. FEKO LITE could also form the basis for simple antenna design projects.

 

Using FEKO LITE

Registration as a FEKO LITE user is absolutely free of charge and without expiration date.

  • Request to download FEKO LITE.  You will be asked to provide your email address (which identifies you in our customer database in future) and some personal information, which we treat as confidential.  An automated response will be sent to you explaining how to download and install FEKO LITE.
  • Register or renew your FEKO LITE licence.  FEKO LITE will work without registration for a limited period.  After expiry of this period, you can continue to use FEKO LITE free of charge, but you will have to register it.

 

FEKO LITE Example Projects

To demonstrate the capabilities of FEKO LITE, a few example projects are listed below.

Microstrip Patch Antenna

A probe-fed, rectangular patch antenna on an infinite substrate backed by a ground plane, is modelled. The frequency response is first calculated, using FEKO's adaptive frequency sampling feature. From this result the resonant frequency is obtained. The antenna is then analysed specifically at its resonant frequency, to obtain the current distribution and the radiation pattern. Below on the left, the input impedance as a function of frequency is displayed in both Cartesian format and Smith-chart format. On the right a POSTFEKO screenshot is shown, where the structure itself, the current distribution and the radiation pattern is being examined at resonance.

FEKO_LITE_microstrip_patch_input_impedance_POSTFEKO_w375px.png

FEKO_LITE_microstrip_patch_3d_views_POSTFEKO_w375px.png

Yagi-Uda Wire Antenna

A Yagi-Uda wire antenna with one excitation element, three director elements, and one reflector element is considered. The CADFEKO screenshot on the left shows the model setup.  Model symmetry is exploited to reduce complexity of the simulation.  As can be observed from the POSTFEKO screenshot on the right, the input impedance is almost purely real around 400 MHz. The calculated current distribution and radiation pattern are examined at this frequency.

FEKO_LITE_yagi_uda_antenna_CADFEKO_w375px.png
FEKO_LITE_yagi_uda_antenna_POSTFEKO_w375px.png

Monopole Antenna on a Finite Ground Plane

A quarter-wavelength monopole mounted on a finite ground plane, of which the circular circumference is 3 wavelengths, is simulated. On the left, the geometry and solution set-up in CADFEKO is shown. On the right, a POSTFEKO screenshot is shown which includes a 2D far-field pattern cut, the current distribution on the structure, and a 3D radiation pattern visualisation.

FEKO_LITE_monopole_antenna_finite_ground_CADFEKO_w375px.png
FEKO_LITE_monopole_antenna_finite_ground_POSTFEKO_w375px.png

Licence Restrictions

The following table details the FEKO LITE licence restrictions.

Model Elements
Limit
Number of wire segments
500
Number of  triangular surface patches (metallic, dielectric, for MoM or PO or surface of FEM region)
500
Number of cuboidal volume elements
20
Number of polygonal plates (UTD or PO)
5
Number of UTD cylinders
1
Number of tetrahedral volume elements (FEM or MoM)
300
Total number MoM and PO basis functions
750
Number of layers for a planar Green's function
2
Number of triangular surface patches solved with GO (ray launching) 20
Number of ray interactions for the UTD or GO (ray launching) 2
Number of cable paths 1
Number of individual cables in cable bundle 2
Number of cable shield definitions 1
Number of array elements 6
Solution Specification
Limit
Near-field observation points per request
1000
Far-field observation directions per request
703
Number of frequency values
10
Solution Metrics
Limit
Main memory that can be allocated by FEKO kernel
20 MByte
Number of processes for parallel FEKO version
2
Total run-time (wall-clock time) of FEKO kernel
10 min
Number of discrete frequency sampling points for adaptive frequency sampling
10
Maximum frequency bandwidth fmax/fmin for adaptive frequency sampling
3
Number of simultaneously active excitations
5
Number of optimisation variables (degrees of freedom)
2
Number of optimisation steps (i.e. iterations)
20