Newbie level 2
Hi, all. Recently i found some weird things with my antenna. My antenna has a frequency range from 850Mhz to 4Ghz. When transmitting signals by using carrier from 850Hz to 2Ghz, I can find the phase rotation of the received signal when decreasing the distance between the transmitting and receiving antennas. However, when doing the same thing by sending signals on 2Ghz to 4Ghz, i did not see dramatical phase rotations. There were just some trivial changes about the amplitude and phase when decreasing the distance. That confused me. Any ideas? Thanks so much.