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with zero volts on both I and Q, you'll see almost no output. (the specs say -35 dB leakage, so with +5 dBm on input, you'd expect -35dBm output). Now put 0.1 or 0.5 V on a port and see what you

dear Jim Lux, Many thanks for sharing your experience. I guess I did exactly the same as you said to me. But, I am using an AWG (Arbitrary waveform Gen.) to provide me with the I/Q voltage. So, using

There has been discussion of this here before. I saved much of it to a file on my computer for future reference, but you can find it all here: /g/nanovna-users/topic/88059902

Here is an example of a reference dipole, which has a 1λ x 1λ reflector and two halfwave dipoles spaced λ/4 from the reflector. It has a midband gain of 9.6dBi;

If you put the nano at one end, then the other coax has to be twice as long.Total coax is about the same.? ? ?And you really would like to have the human operator and his equipment out of path.?

Near Zero dB Signal to Noise just is not the levels you would like to be working with! hihi.? ? ? As I have said before, cute toy, very handy, I own 3, but just not the tool for antenna patterns!?

Put the Nano at one end, then you have only one coax loss. 20 feet of RG-8X is only 2.6dB at 900 MHz.? RG-6A is 1.9 dB. I'd use cable TV coax. And at 900 MHz you don't need 10 meters.. 3 or 4 would

I have used my Nano to measure the coupling between the two HF wire antennas I have to get some kind of idea how they interact. I have no idea what the threshold of coupling would be to cause a

Figuring 3 meters at 900 MHz, the free space loss between isotropes is about 40-45 dB. Yeah, not great. If the probe is a dipole, and the AUT is a dipole, that's an S21 of -35 to -45 dB, which is

If you are using little rubber antennas at 3 Meters, yes the Nano has enough dynamic range. BUT, at 40 feet you have over 50 dB of free space path loss.? Throw in that you must run coax to both the

This is a fascinating to hear since I did not think the nanoVNA could radiate enough RF energy to be detected by a receiving antenna connected to the other port. Or that the nanoVNA would have enough

A couple of weeks ago, I emailed this group with a detailed procedure for determining the gain of an antenna. Fortunately, I saved the writeup. Here it is again: Gain can be measured by the amateur,

To make any absolute gain measurement you are going to need a pair of reference dipoles with known (or calculable) gain. You will use these to calibrate out the losses in your system, both cable

From another of your messages: If you have DFUseDemo working then the actual answer to your question is that you realy don't want any of the STM32Cube files. They provide no added value over the

Hi Jim?? The Nano simply does not have the dynamic range to do that unless he is working with very low gain antennas.? ?Kent WA5VJB

Kent, It keeps failing to your email Thanks Tom EV Cables Company LLC https://www.ebay.com/str/evcablescompany 407-571-2470

I have quite some experience in measuring the gain of 900-930 MHz RFID antennas. ? It is very easy to calculate the antenna gain with two unknow but identical antennas. You measure s21 with the

While the nanoVNA can be used as part of an antenna range to measure antenna gain, the basic device does not measure the gain of an antenna. William Smith ComputerSmiths Consulting, Inc.

Hi Tom Not really to tool you want to use for antenna gain. I have an antenna range, drop me a note directly.wa5vjb@...

Jim, thank you, that is a bit more complicated then I expected. Now I need to determine how to make this work. Tom