skatefast08
Full Member level 3
I am building a 2.4 GHz LNA (2 layers), I want to be able to use the maximum amount of solder to connect a larger end-launch SMA to my PCB that includes the FR-4 and top and bottom layer of copper ( https://imgur.com/a/k7u2WPu ). The smallest SMA fitting I can find is 0.032''(0.813mm) and I want to attach this to my 0.4mm PCB board.
Due to the equation for calculating Zo for microstrip (needing 50 ohms). The more I decrease the thickness of my PCB (decreasing FR-4 size; H; dielectric), this will allow me to decrease the width of my t-line in order to get a closer width of my SMD (0402) components.
The main question, how much solder (in height) to attach SMA with PCB would keep me from decreasing the performance of my LNA? (I know this sounds a bit silly, but im not interested in the noise, only the gain and stability)
What h(height; dielectric), w(width; t-line), t(thickness of copper) and SMA connector size, using FR-4 would you use to design 50 ohm microstrip with 0402 components? (if I have this answer, this would be the best)
Due to the equation for calculating Zo for microstrip (needing 50 ohms). The more I decrease the thickness of my PCB (decreasing FR-4 size; H; dielectric), this will allow me to decrease the width of my t-line in order to get a closer width of my SMD (0402) components.
The main question, how much solder (in height) to attach SMA with PCB would keep me from decreasing the performance of my LNA? (I know this sounds a bit silly, but im not interested in the noise, only the gain and stability)
What h(height; dielectric), w(width; t-line), t(thickness of copper) and SMA connector size, using FR-4 would you use to design 50 ohm microstrip with 0402 components? (if I have this answer, this would be the best)
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