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I would like to ask you about this error:Mesh is empty using CST. Any suggestions about which could cause such error ?!
Note: I am simulating a structure which has mm as a unit and GHz FOR THE FREQUENCY unit.
Thank you !!
I want to know how to distinguish between the cases when there is an electrical coupling an those we have a magnetic coupling.
an example is shown in the picture attached where both occur but I couldn't say/explain where or why the couplings occur.
Hope I made myself clear...
thank you very much!
I feel like confused about the figures of volker they don't tell much to me :-(
Ps: could you please specify the planes by xy and yz the terms horizontal and vertical depends on the structure positioning.
I have a loop monopole antenna while visualizing the E and H patterns I get them swaped (E must be H and
vice versa). Any ideas about what could cause such thing!
Note: I took E plane (phi=0º) and H plane (phi=90º)
Thank you, very much for the open sources, I appreciate it!
could you give any arguments for your choice or references , I will be grateful!
because I have been looking into the literature for a quite long period and I can't decide maybe because I am new to this field !
I didn't build an antenna yet but it will be a slotted one (simple and not stratified).
Now, I am confused about the adequate method that could be applied to get the characteristics (phase constant, attenuation,..etc), as going through the literature most used ones are MoM and Mode Matching...
Yes, I am using a vector network analyzer (VNA). supposing I will use the cable that comes with the VNA, it will not be useful for any other kind of measurements due to the coaxial-Stripline transition that I have to consider in one end of it.
but I have a doubt a bout the ground plane...
yes I would like to measure the antenna properties, well at least get the S11 :-(
the antenna is as I said a planar antenna with a microstrip feed line, the frequency band is [5-36GHz].
how a cable termination is employed with a planar antenna to perform the measurements ??!
is there any specific characteristics of the cable in respect with the frequency band of the antenna? the dimensions of the cable/inner conductor?
I highly appreciate any information about this...
I have notice that when I represent the radiation pattern sometimes I get a green curve which is not mentioned in the legend of the plot. Can anyone tell me what does it really stand for? I have attached an example which clarifies more the question
I am having troubles in representing the eigenvalues of a dipole antenna using characteristic modes theory, the modes merge while they should not because it is a very simple antenna, any hints to solve the problem??!
Please find attached the figure of what I obtain and how results...