Hello,
I have a problem with the feeding of monopoles antenna.
I first simulated a LPD antenna (cf. "LPD Antenna.jpg") made of 7 dipoles, i.e. 7 wires with a port set on their middle. Only the first (littlest) dipole is fed with a voltage source on is port. The other dipoles are fed with a non-radiating transmission line like in the principle scheme of Fig. "LPDA principle.jpg", which is achieved with Fig. "Feeding system.jpg".
It provides good results, accorded to the afferent litterature.
But what I would like to model now is a real LPDA (cf. "Real LPDA.jpg"), in which the radiative éléments are no more dipoles but non-aligned monopoles.
The problem that I have now is to find a non-radiative feeding system like the transmission line of Fig. "Feeding system.jpg", which is not obvious anymore for me.
The Feko philosophia is to have ports which are necessary both sides surrounded by a conductor : in the Feko examples documentation, a monopole is always electrically unioned with a ground plan for instance, so its "start port" is anyway connected both sides to a conductor).
I'm searching for a way to feed a port which the "+" pole would be connected to a monopole antenna and the "-" pole would be connected to another monople antenna a bit farther (not sticked to the first one), with a non-radiating line.
Would anyone have any thought about this ?
Thank you in advance.
