I am testing two antennas and want to compare their noise figures. But all the articles are about how to measure active circuits' NFs. Is there any way to measure an active antenna's NF? (Easy test methods are expected.)
The active antenna's noise figure should be measurable like any other receiver noise figure. See the discussion in the attached report. It's all about comparing noise against a precision source. Is there something unique about your antenna that precludes this? Perhaps the active antenna's gain isn't well known? something else?
Technical Report Noise and Noise Figure for Radar Receivers
Dr. Doerry, thanks for your reply and the report. There is nothing unique about my antenna. I want to compare the antenna's performances in the cases of with or without the active components in the antenna. The active components in the antenna are not used to enhance antenna gain; they are used to change the antenna's operating frequency and bandwidth.
I am curious about the performance change on NF if an antenna has active components in it. I haven't seen any papers discussing the particular issue.
Dear Hong;
Yeas you are correct, I am currently designing an active transceiver, I found that noise figure is very important to increase the overall system performance. However, noise figure of circuits in the receiver such as amplifiers and mixers, adds additional noise to the receive channel. This raises the noise floor at the demodulator.
My focus will be on adapting different components from different brands with a different NF.
I will keep you updated when I publish my paper.
Sincerely your;
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