Mutual Coupling between two SPH sources

RutwikJoshi

1] I want to check the mutual coupling between two SPH sources separated by distance of 900mm. For that i have two SPH sources oriented in Broadside direction of Patch antenna array & 45 degree in XY plane.(Note : Both the sources are oriented in Azimuth plane). if we can check the mutual coupling between these equivalent sources in feko, kindly give the workflow to carry out such type of analysis.

2] While working with those sources individually, there radiation patterns was as shown in the attachments.

Fig: Broadside Rad. Pattern

Fig: 45 Degree Rad pattern.

when these aources we combined in one file ideally they should retain their Rad. patterns . but, it was seen that both the rad.patterns changed, as shown in fig.

i suspect these equivalent sources are interacting with each other because of that their rad.patterns are getting changed .

Evan_Urban

@RutwikJoshi From what it looks like, I think you are familiar with importing .sph files. I am working with just a basic dipole to show the workflow.

First I define the transmitter orienting it for the N vector along the X axis:

Then in Request tab I choose the Spherical Mode Receiving Antenna:

Placed it d (1 meter) away from Tx (Oriented 90 degrees in Theta to better show results):

I set the Power to be 1 Watt:

Just for the purpose of the workflow, I will just run one simulation instead of doing a parameter sweep. In POSTFEKO, plot the Rx Antenna power results, add Total Power results, add new math and perform 10*log(Prx/Ptx):

As for your second question, the source pattern does not change due to outside influences, however the far field results are affected due to scattering, reflection, etc.