jayce3390
Full Member level 6
Hi,
I am designing my own Test Fixture to measure a packaged transistor, the TF is composed of 2 launches (with biasing path) and a line to make the TRL calibration.
The TF center frequency is 2185MHz and it's 50 ohms reference impedance. I would like to be able to perform measurement from 0.5GHZ to 8GHz, but It seems that the launch has S21 resonnant frequency about 4.5 GHz, it is a problem.
This is due to bias circuit. i don't know how to get a flat S21 full bandwidth.
My project is available here.
I am designing my own Test Fixture to measure a packaged transistor, the TF is composed of 2 launches (with biasing path) and a line to make the TRL calibration.
The TF center frequency is 2185MHz and it's 50 ohms reference impedance. I would like to be able to perform measurement from 0.5GHZ to 8GHz, but It seems that the launch has S21 resonnant frequency about 4.5 GHz, it is a problem.
This is due to bias circuit. i don't know how to get a flat S21 full bandwidth.
My project is available here.