yefj
Advanced Member level 4
Hello , I have learned from a manual that in circular polarised patch antenna we generate 2 modes which have the same amplitude with 90 degree phase.There is an intersection point between two hills which is supposed to be the point where those modes are 90 degree phased ifference (each hill supposed to represent the resonanse plot of the mode).
I have tried to implement the manual in actual CST simulation.
As you can see bellow the is a coaxial cable which acts for pin feeding as shown bellow.
on the coaxial pin feeding i have defined waveguide port as shown bellow.
then i looked at the far field plot of each electric field mode as you can see bellow.
The field lines of the modes are not perpandical to each other as shown bellow.
Also CST says that these are TEM modes instead of TM for some reason.
also i tried to look at the Z-parameter plots.where i was supposed to see the two hills from the manual with the intersecting point,i only saw one hill.
Where did i go wrong?
Why my modes are not perpandicaluar to each other?
Thanks.
I have tried to implement the manual in actual CST simulation.
As you can see bellow the is a coaxial cable which acts for pin feeding as shown bellow.
on the coaxial pin feeding i have defined waveguide port as shown bellow.
then i looked at the far field plot of each electric field mode as you can see bellow.
The field lines of the modes are not perpandical to each other as shown bellow.
Also CST says that these are TEM modes instead of TM for some reason.
also i tried to look at the Z-parameter plots.where i was supposed to see the two hills from the manual with the intersecting point,i only saw one hill.
Where did i go wrong?
Why my modes are not perpandicaluar to each other?
Thanks.