Phase measuring with a network analyser

[guytoub]

hello,

I want to know if it's possible to measure the phase beetween two signals with à network analyser.
the test i want to realise it two put a signal throught a combiner and measure the phase with a network analyser.

thanks

 

[BigBoss]

You cannot measure Phase Noise with VNA. You should at least a Spectrum Analyzer ( some of them have PN Measurement Feature ) but the best option is to Phase Noise Measurement Analyzer.
Because overall accuracy of SA is lower than PN Analyzer.

 

[danadakk]

Yes in a VNA, just google "vna phase response"


Regards, Dana.

 

[FvM]

Not with a standard VNA unless the signal is generated by the VNA itself. It measures the phase and magnitude of an input signal referred to the VNA generated output.

Please describe the test purpose and intended setup in detail.

 

[vfone]

Phase difference can be measured on an oscilloscope by determining the time delay between two signals along with their period.

 

[volker@muehlhaus]

From the initial post, I think the task is: "measure the phase (difference) beetween two outputs of a power splitter with a network analyser"

If my understanding is correct and you have a 2-port network analyzer, you would measure from input to first output port, with the other output terminated into 50 Ohm. Then repeat this for the other output. The difference in S21 phase between both mesurements is what you are looking for.

 

[guytoub]

From the initial post, I think the task is: "measure the phase (difference) beetween two outputs of a power splitter with a network analyser"

If my understanding is correct and you have a 2-port network analyzer, you would measure from input to first output port, with the other output terminated into 50 Ohm. Then repeat this for the other output. The difference in S21 phase between both mesurements is what you are looking for.

thanks @volker@muehlhaus for your soulution.

it's exactly the phase difference and want to meausre .

@FvM i built a four ways beamformer and i wanted to measure the phase difference.
Now i want to know if and why i can measure the phases contibution beetween the outputs without plugin antennas.

thanks

--- Updated Aug 7, 2023 ---

Phase difference can be measured on an oscilloscope by determining the time delay between two signals along with their period.

i do that and see the difference but in high frequencies i can't cause my oscilloscop stops at 4Ghz.