A long time ago there was a curve that showed the mismatch error between SMA and 3.5 mm (and I think 2.92 mm) as a function of frequency. Does anyone know if the curve was generated for the 2.4 mm and 1.85 mm interface?

Thanks.

A long time ago there was a curve that showed the mismatch error between SMA and 3.5 mm (and I think 2.92 mm) as a function of frequency. Does anyone know if the curve was generated for the 2.4 mm and 1.85 mm interface?

Thanks.

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Hello Mikejvir,

I was not able to find the exact mismatch error curves for the connectors you mention but here is some information that could hopefully help.

Here is an application note called "Microwave and Millimeter Signal Measurements" which has a section on "New Research on Mismatch Error Calculations Yields Tighter Accuracy Specifications" on page 18.

Part of this passage states that in the past mismatch uncertainty was modeled in a way that overestimated the magnitude of error due to mismatch. Instead, a "new statistical method using a Rayleigh distribution has been validated by experimental evidence to more accurately estimate mismatch error." For that we have this white paper, titled "Revisiting Mismatch Uncertainty with the Rayleight Distribution" which goes into detail on this statistical method.

Hello Mikejvir,

I was not able to find the exact mismatch error curves for the connectors you mention but here is some information that could hopefully help.

Here is an application note called "Microwave and Millimeter Signal Measurements" which has a section on "New Research on Mismatch Error Calculations Yields Tighter Accuracy Specifications" on page 18.

Part of this passage states that in the past mismatch uncertainty was modeled in a way that overestimated the magnitude of error due to mismatch. Instead, a "new statistical method using a Rayleigh distribution has been validated by experimental evidence to more accurately estimate mismatch error." For that we have this white paper, titled "Revisiting Mismatch Uncertainty with the Rayleight Distribution" which goes into detail on this statistical method.