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One needs to specify Ex and Ky for a plane wave as in a scattering calculation.
One specifies the radiation boundary for a far-field calculation.
What is your calculation?
The transmission lines are for carrying TEM waves and waveguides are for carrying other TE/TM modes. For transmission lines, you can calculate the characteristic impedance given their geometry and the materials. If the geometry is not comparable to the wavelength, you will find the...
I was asked on a related question. The time-domain oscilloscope measures the voltage and one parameter in its spec says a RMS maximum noise be 2 mV.
Is this "RMS maxiumum noise" considered an equivalent of some "voltage resolution", i.e. the oscilloscope cannot differentiate the two signals...
Your example of satellite communication antennas reminds me of transducers used in medical imaging, which has a physical dimensional several acoustic wavelength long. Their functional region is fresnel region, as opposed to the Fraunhofer region for sat comm.
Thx for the reply. Power margin seems to have a good definition as the excessive power above the minimum power. I initially thought I am looking for the "sensitivity" of a system. The "sensitivity" seems to be defined as the minimium detectable power above the noise floor. However, my signal is...
Thx for the pointer. I looked up the spec of the vector network analyzer in the lab and indeed it has something called "power resolution" in the unit of "dB".
Would anyone be able to comment on why the unit of power resolution is in "dB" but not in some linear scale for the network analyzer?
I have a radar related problem. Consider having a target that reflects power of 1 mW from 1 GHz to 2 GHz. Then I replace the target by another one. The reflected power is 1.1 mW over the frequency range. The power variation is 0.1 mW.
My question is, what is the name of the metric that...
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