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Hi Guys,
I have a problem with CST. Basically I have two objects, the substrate and the microstrip. The microstrip has a via going through the substrate and is connected to the group plane on the bottom. I need to perform a parameter sweep which involves moving the board, but I need the board...
Hi Guys,
I know that a for a microstrip design on a piece of substrate with a ground plane then mode is quasi-TEM. But what would the mode be for a microstrip line on a piece of substrate with no ground plane? I assume the electric field can no longer go throught the substrate so would it be...
Hello,
So are M12 and M21 just the inductance's of the respective coils when the other coil is short circuited? I don't really understand your post.
Many Thanks
Hey guys,
I have a planar microstrip structure on a piece of substrate and am simulating it within CST microwave studio.
There is a ground plane on the back and a strip on the top which the middle pin of a SMA connector would connect to.
From reading the CST help literature I assume that the...
I'm back, I went with a simple L matching network in the the end using an inductor in parallel and a capacitor in series at the input. I didnt wanna spend anymore time on the matching network really so just went with a lazy option. Would be very hard to manufacture because of values, tolerances...
Hi Guys,
I am really confused about how to caluclate the mutual inductance (M) and coupling coeffcient (k).
I am using two pairs of indentical square loops, so number of turns 1, each on their own piece of FR4 substrate so the structures are planar. The structures are resonant, through the...
P.s. I actually want as little far field radiation as possible (always going to get some), that's why I chose the small loop design because of its low radiation resistance. I am designing a near field antenna so I just want the antenna to radiate in the reactive near field. I understand if two...
Thanks for the quick reply, much appreciated.
I will try out your suggestions on my loop, have you got any good materials or thoughts on the mathematics involved (Capacitor values, Delta match lengths, etc) or shall I just google it and see what i can find?
Thanks again
Hi Guys,
I have designed a electrically small square antenna on a piece of 0.8mm FR4 substrate (not great for this application I know) operating at 2.4 Ghz. The antennas circumference is 40mm (1/20 of 0.125 wavelength to get the radius then multiplied by 2pi to get the circumference). The...
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