Hey, I designed an impedance matching circuit as shown in the attachment. I was able to simulate the VSWR of the impedance matching circuit. I then added real traces in the simulator I am using and for simplicity sake just set all the trace widths and lengths to 1 mm each for now. I re-simulated the VSWR with real traces but my response is not very close to the simulation of the ideal circuit as can be shown in the attachment. I'm only operating between the frequencies of 150 MHz and 300 MHz, so unless I'm mistaken, I shouldn't need to worry about the trace widths as long as I keep my trace lengths shorter than about 55 mm since that is approximately 1/20th of a wavelength at 300 Mhz. I was able to build a filter using this same approach. Any ideas as to why this approach wouldn't work for an impedance matching stage at this frequency?
The specs of my board are FR4 board, 35um copper thickeness, .062 inch board thickness, and 2 layer board.
The specs of my board are FR4 board, 35um copper thickeness, .062 inch board thickness, and 2 layer board.
Attachments
-
18.8 KB Views: 34
-
20.1 KB Views: 31
-
20.8 KB Views: 35