Georgy.Moshkin
Full Member level 5
I am creating layout for testing BGT24MTR11. In my case RF in/outs must be connected to single ridge waveguides, through microstrip to waveguide transitions. So currently all microstrip paths are tied to ground.
I found two reference designs where:
1) Patch array do not have dc path to ground. In this case Rf in/outs either directly connect patch arrays.
2) Patch arrays have DC path to ground (probably ESD protection). In this case RF in/outs connected to patch arrays through microstrip DC block (coupled λ/4 lines). It makes me think that RF in/outs have some DC offset and could not be tied to ground (DC).
Although documentation states that:
I found two reference designs where:
1) Patch array do not have dc path to ground. In this case Rf in/outs either directly connect patch arrays.
2) Patch arrays have DC path to ground (probably ESD protection). In this case RF in/outs connected to patch arrays through microstrip DC block (coupled λ/4 lines). It makes me think that RF in/outs have some DC offset and could not be tied to ground (DC).
Although documentation states that:
Why there is DC block? (Sense2GoL demoboard). Can someone confirm that RF in/outs may be have direct connection to ground (outside of MMIC)?MMIC provides short circuit to GND for all RF pins
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