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A BPF saw filter after at port 3 would solve the component count? LO cancellation is also generally done inside the radio Rx/Tx Soc. What's the dBc requirement you are looking for? From the graphs it seems like it's around -53 dBc. Is that leakage level enough? The directional coupler in most...
Ok. So, I varied the length of the coax cable from 49.5 cms( original length which was used in the anechoic chamber) to 50.5 cms. The f/2 disappeared with 50.5 cms. All 3 channels are clear.
The frequencies what you are seeing is roughly nfo. The designed antenna may also be resonant at all these frequencies. If you see the current distribution at far fields these frequencies may exhibit the maximum current distribution.
You want to present a bunch of load pull data on the gate side of the transistor and design a matching network. Since it's push-pull network the design is symmetrical. You can simplify it but just simulating the upper half or the lower half. In that case, it's just a 1 port file. The better way...
S parameters are small signal analysis and is limited by signal amplitude levels. HB analysis works in a way by introducing signal perturbation on critical nodes. Particularly summing nodes on feedback paths. You can only model so much and predict when it comes to instabilities. I did do some...
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