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Hi, I am facing the following problem with a bias tee in my RF application.
I need to measure the noise output from a resistor R ~ 500 ohm (in a tank circuit) at about 120 MHz, while exciting it with a low frequency current. For noise measurement, the output of the tank circuit is fed to the...
If I understand right, the splitter will send power to the right side as well. The right side is a delicate amplifier which I would prefer to keep isolated during this measurement. I still can use it as long as the power is less than -40 dBm.
I have to study more about the calibration of VNA...
First I have to clarify that yes, the graphs are mislabeled. They are all S11. I am very sorry for that mistake.
Second let me explain the purpose. I am interested in measuring the noise in the device under test which has a resistance R. In order to extract it out, I have installed R in an LCR...
Thanks for the reply! But please clarify a few things for me because I am new to this. What are you referring to as the coil? Is it the inductor L? Are you saying that I have to put a capacitor between L and the bias tee? Actually I don't see any additional resonance in terminal B when compare...
I am building a circuit to measure the S11 characteristics of an LCR tank circuit. The LCR tank circuit is connected to the next stage, so in order to probe the LCR circuit, I am using a directional coupler. The circuit is shown in the attached pdf. As shown there, S11 of the tank circuit shows...
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