The customer uses HMC6981LS6 at 17.7 to 19.7GHz.
He is minding the detecting characteristics changes when the load of antenna is fluctuated. (VSWR, etc)
So, please tell me the following.
- About the inside detecting circuit of HMC6981LS6, how structure does it have?
How connected does the inside diode to RFOUT pin?
- Coupling connection?
- Direct connect to RFOUT through resister?
If HMC6981LS6 has the coupling connection, he will feel easy because it has good isolation.