https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6546869
This is the antenna design and paper I am trying to replicate. I didn't use a grounding plane as one was not stated in the work. I also placed two waveguide ports on either end of the dielectric substrate. For some reason, my S11 parameter (reflection coefficient) is only showing a -1 dB at .789 GHz and 1.2126 GHz. The only warning I am receiving is "maximum number of pulse widths simulated, solver stopped. Please note steady state energy criterion has not been satisfied." I estimated a microstrip thickness of 1 and .5 mm but results stayed the same. I also tried copper and PEC for the antenna. I normalized to 50 ohm impedance and -50 dB for solver configurations.
Wondering if anyone can let me know if they see any errors I may have made of if the warning is indicative of something wrong or any other guesses. This is my first time designing antennas and using CST so not really sure where to go. Much appreciated!!
I can only read the first page of that paper. If it is in microstrip it will have a ground plane on one side of the substrate.
Hii..it seems u need to use parametric sweep and add dgs or gab....I am fond of simulation...contact me ...ifu need help
You need to read reference 3 and perhaps reference 4. This antenna probably doesn't have a groundplane. It is polarised along the direction of the bars. To feed it you need to use coax perpendicular to the bars, either in the horizontal direction on the page, or directly into or out of the page, so that the feed doesn't short out the radiated field. I imagine the feed is across the slot in the centre antenna, but I don't know what the other solder is for. Maybe reference 3 will say.
You could also feed it with microstrip perpendicular to the bars, from behind the antenna. If it is a yagi it should fire with peak gain in the horizontal direction in the plane of the page, probably to the right.
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