I'm using a power amplifier that requires an external blocking capacitor for the input and output ports and I'm trying to decide the best value to use. My understanding of this is that I choose a capacitance that is sufficiently large such that the 3dB frequency is a good deal lower than my lowest frequency of operation (answered here). I also imagine that it's important to choose a capacitor with the smallest possible ESL. Are there any other considerations that are important here? What about RF currents heating such small caps?
So, I'm thinking of using a 0402 100pF cap which, given my lowest frequency of 5.3GHz and min Rload of 6ohm, should put the corner frequency around 250MHz, well below the 5.3GHz. Does that seem sensible?