How is the phase delay of a network calculated?

How is the phase delay of a network calculated?

Phase delay definition. Phase delay (a.k.a. time delay) is calculated from the unwrapped transmission phase angle of a network: When frequency is in GHz, time delay will be in nanoseconds. Angle is in degrees, if it was in radians you would divide by 2xpi, so says Captain Obvious. Phase delay is the true measure of time delay,…

Can a log amp measure the phase difference between two signals?

The AD8302 can also measure the phase difference between two signals, from low frequencies up to 2.5 GHz. Each of the individual log amps generate a “hard-limited” output at its final stage.

How is phase delay used in designing time delay units?

Phase delay is what is used in designing time delay units, in order to convert S-parameter data into units of time. This is not complicated calculus like Fourier transforms, it is simple algebra.

Can you measure phase difference at 2.5 GHz?

Measurements of signal-level ratios The AD8302 can also measure the phase difference between two signals, from low frequencies up to 2.5 GHz. Each of the individual log amps generate a “hard-limited” output at its final stage.

When do you use a phase delay unit?

Phase delay is what is used in designing time delay units, in order to convert S-parameter data into units of time. This is not complicated calculus like Fourier transforms, it is simple algebra. Not everyone knows this, but phase delay is by definition, time delay, as we will derive below.

How is the length of a transmission line related to the phase angle?

Note that electrical length of as transmission line is related to the unwrapped phase angle of S21. If your electrical length was 360 degrees, the unwrapped phase angle would be -360 degrees, for example.

How to determine time delay from S-parameters?

There seems to be a broad misunderstanding about how to determine time delay from S-parameters. Here is an app note that tells you to look at group delay, which will give you misleading results. Microwaves101 will set you straight. Phase delay is what is used in designing time delay units, in order to convert S-parameter data into units of time.