In datasheet of the transistor, CGHV40100, I could not find the power consumption of its. How can I calculate the power consumption? Datasheet of the CGHV40100
This is not an amplifier, it's GaN HEMT where the T stands for Transistor. With such a transistor you can build an amplifier.
You choose a very niche type of transistor, it is designed for high power (more than 100 W) RF applications up to 2.5 GHz. I wonder why you have chosen this type of transistor as it requires a lot of experience to work with them.
By that I mean that this transistor must be used in a certain way, things to consider are:
- what is the frequency (band) of interest to you
- how much signal gain do you design the amplifier for
- what biasing voltages and currents are then needed
- what will be the matching components at input and output
- signal distortion, a trade-off against efficiency must be made
- what cooling solution will you use
To get an indication, from the datasheet, in their 1 GHz measurement / testcase the saturated power is 100 W at an efficiency of 56 %. That means that about 178 Watt is consumed in total. And output is 56% * 178 W = 100 W. So about 78 W is dissipated as heat. That's a lot, good cooling is needed at this power level.
This is just one example case, for your particular case the numbers will be different.