Log Periodic Dipole Array Antenna

Radio interference occurs when two or more RF systems affect one another’s smooth operation. This normally occurs when two or more RF systems are operating physically close to one another and they are operating in such a way that one of the transmitters negatively impacts one or more receivers. Through this demonstration video you will learn how to analyze and mitigate collocation interference on a ship and also how to analyze and find solutions for interferences between ground radio stations.

RF co-site interference occurs when two or more co-located RF systems affect one another’s smooth operation. This normally occurs when two or more RF systems are operating physically close to one another and they are operating in such a way that one of the transmitters negatively impacts one or more receivers. This document explains you the workflow and includes an exercise following the steps to solve a co-site interference problem from the creation of the transmitters, receivers and antennas, through the stations and coupling loss matrices, and to the analysis.

In thei s video you will get an introduction to the CADFEKO interface.

In the is video you will receive an introduction to POSTFEKO.

This video will provide an overview of the Feko profile in HyperMesh.

This video will provide a demonstraiton fo Altair Feko.

Calculate the input impedance of a windscreen antenna constructed from wires. The windscreen consists of a layer of glass and a layer of foil.

Calculate the coupling between two horn antennas separated by 60 wavelengths. A metallic plate between the horn antennas blocks the line-of-sight coupling. Replace the horn antennas with a far field equivalent source and receiving antenna.

Calculate the gain for a cylindrical horn feeding a parabolic reflector at 12.5 GHz. The reflector is electrically large (diameter of 36 wavelengths) and well separated from the horn. Several techniques available in Feko are considered to reduce the required resources for electrically large models.

Calculate the radiation pattern of a dielectric lens antenna. The lens is illuminated by an equivalent far field source with an ideal cosine pattern. The lens structure is modelled using the ray launching geometrical optics (RL-GO). Compare the RL-GO solution with a hybrid FEM/MoM solution.

Calculate the far field pattern of a pyramidal horn antenna at 1.645 GHz.

Calculate the input reflection coefficient of an aperture coupled patch antenna. Use continuous frequency sampling to minimise runtime. Compare results for a finite and infinite dielectric.

View and post-process the results in POSTFEKO.

Calculate the current distribution and far fields for a MIMO elliptical ring antenna. Use characteristic mode analysis to calculate the results for different modes.

Consider the resource saving advantage of using the MLFMM for electrically large models.

Calculate the radar cross section and the near field inside and outside of a dielectric sphere using the surface equivalence principle (SEP).

Calculate the bistatic radar cross section of an electrically thin dielectric sheet. The sheet is modelled using the thin dielectric sheet approximation and is illuminated by an incident plane wave.

Calculate the coupling between a monopole antenna and a nearby shielded cable that follows an arbitrary path above a ground plane.

Calculate the safety zones around a Yagi-Uda antenna based on radiation INIRC88 and NRPB89 standards. View the safety zone ISO surfaces.

Calculate the exposure for a sphere of muscle tissue illuminated by a dipole antenna.

Match a short dipole for resonance at 1.4 GHz with an LC matching section. The matched network is modeled using a Spice circuit and S-parameters.

Calculate the input impedance of a circularly polarised patch antenna fed through a microstrip branch coupler. Replace the branch coupler with a non-radiating network and compare with a full solution.

Observe the effect of an obstacle on a plane wave. Obtain frequency domain results using a wideband simulation using the method of moments (MoM). Perform post-processing of the frequency domain data to obtain a time response.

See a demonstration of creating ana analysis of a waveguide splitter.

See a demonstration of the optimzation capabilities within FEKO on a bent dipole.

Optimise a Yagi-Uda antenna design to achieve a specific radiation pattern and gain at 1 GHz. The Yagi-Uda antenna consists of a dipole, reflector and two directors.

Altair Feko provides the necessary workflow for commercial antenna patterns.

See a demonstration of the finite arrays tool creating a 4X2 dipole array.

See a demonstration that sets up multiple configurations on the same model such as one dipole active and two dipoles active.