Comments on “Measuring Noise Parameters Using an Open, Short, Load, and λ/8-Length Cable as Source Impedances”

The above article presents an interesting method for extracting noise parameters using highly reflective loads, such as those available in a vector network analyzer (VNA) calibration kit. While the approach addresses a well-known singularity issue, the above article does not explicitly acknowledge that this issue had already been resolved in earlier classical formulations—some of which are, in fact, cited in the article itself. Combined with the absence of other relevant References, this may give the reader the impression that the technique is entirely novel. This comment aims to clarify the context of the contribution and highlight earlier developments with similar approaches. It does not question the validity of the results but suggests that better acknowledgment of previous work would help readers more accurately assess the scope and originality of the article.