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I agree that a series diode is the simplest, but you pay a penalty with the forward voltage drop. And at 1A current, this is likely to be a significant percentage of the supply voltage, especially if the supply voltage is low as you suggest. If the supply can be increased to compensate for...
By reverse voltage detection circuit, I just mean any circuit that will pull down the gate of the P-ch FET I mentioned when Vdd exceeds some threshold, and release the gate when Vdd goes below the threshold, as in the case of a reversed supply. The specifics would depend on the value of Vdd...
Simplest way is to add a diode in series with the Vdd pin. Use a Schottky diode to minimize forward voltage drop across the diode, though you may still need to increase your Vdd supply voltage by a few hundred mV to compensate. If you can't do that, you could use a P-channel FET oriented...
I looked at your file and can reproduce the error you are seeing. I see that you tried to enclose the regions behind your ports using sheets assigned as perfect-E boundaries. This still leaves each of your wave ports exposed to vaccuum on both sides. Instead, try replacing...
What temperature rise are you designing for? Is 35um your finished trace thickness, or are your traces plated up thicker than that? IPC-2221 indicates 0.3mm for a 10C rise in 35um copper at 1A, or 0.15mm for a 30C rise in 35um copper at 1A. This standard is widely accepted and generally...
I know little about meta-materials, but I have done some modeling of Helmholtz resonators using equivalent circuits. Previous posters are correct. A low-order LC equivalent circuit is only a valid model of a Helmholtz resonator at low frequencies, where the acoustic wavelength is much larger...
Hello- Playing with what should be a simple GPCW model in HFSS. Wave port excitations, bilateral symmetry (perfect-H). Port heights are 4*dielectric; port widths are 3*(trace+2*gap). Ports-only solution at 4GHz gives Z0~50ohms and fields that look correct. Inspection of gamma for modes 1-3...
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