I don’t understand how this happen. Everythings are same, I just change USRP.
First, I tried with USRP B200 and the difference between 0 and 180 degree is
3dB.
Then I plug Pico VNA, the difference is zero. Then I plug Nano VNA (It’s 50
dollar VNA cheap.) the difference is zero.
I plug my other USRP, It’s B210. The difference is 0,7dB.
Anything changed except USRP.
After of all this I plug USRP B200 again and the difference is 3dB.
When I change the frequency, at some frequencies there is no difference between
0 and 180 degree. I share with you the data. When horn antenna at 0 degree ant
rotate 180 degree.
# 0 degree:
Max. Value at 4001.0 MHz : -32.394
Max. Value at 4002.0 MHz : -32.343
Max. Value at 4003.0 MHz : -32.380
Max. Value at 4004.0 MHz : -32.431
Max. Value at 4005.0 MHz : -32.556
Max. Value at 4006.0 MHz : -32.748
Max. Value at 4007.0 MHz : -32.919
Max. Value at 4008.0 MHz : -33.141
Max. Value at 4009.0 MHz : -33.366
Max. Value at 4010.0 MHz : -33.616
Max. Value at 4011.0 MHz : -33.833
Max. Value at 4012.0 MHz : -34.073
Max. Value at 4013.0 MHz : -34.391
Max. Value at 4014.0 MHz : -34.710
Max. Value at 4015.0 MHz : -35.132
Max. Value at 4016.0 MHz : -35.553
Max. Value at 4017.0 MHz : -35.973
Max. Value at 4018.0 MHz : -36.414
Max. Value at 4019.0 MHz : -36.725
Max. Value at 4020.0 MHz : -36.965
Max. Value at 4021.0 MHz : -37.061
Max. Value at 4022.0 MHz : -37.166
Max. Value at 4023.0 MHz : -37.155
Max. Value at 4024.0 MHz : -37.079
Max. Value at 4025.0 MHz : -36.987
Max. Value at 4026.0 MHz : -36.823
Max. Value at 4027.0 MHz : -36.588
Max. Value at 4028.0 MHz : -36.339
Max. Value at 4029.0 MHz : -36.005
Max. Value at 4030.0 MHz : -35.645
Max. Value at 4031.0 MHz : -35.196
Max. Value at 4032.0 MHz : -34.754
Max. Value at 4033.0 MHz : -34.316
Max. Value at 4034.0 MHz : -33.915
Max. Value at 4035.0 MHz : -33.479
Max. Value at 4036.0 MHz : -33.093
Max. Value at 4037.0 MHz : -32.696
Max. Value at 4038.0 MHz : -32.409
Max. Value at 4039.0 MHz : -32.167
Max. Value at 4040.0 MHz : -31.977
Max. Value at 4041.0 MHz : -31.854
Max. Value at 4042.0 MHz : -31.822
Max. Value at 4043.0 MHz : -31.835
Max. Value at 4044.0 MHz : -31.904
Max. Value at 4045.0 MHz : -32.012
Max. Value at 4046.0 MHz : -32.152
Max. Value at 4047.0 MHz : -32.291
Max. Value at 4048.0 MHz : -32.431
Max. Value at 4049.0 MHz : -32.584
Max. Value at 4050.0 MHz : -32.802
# 180 degree:
Max. Value at 4001.0 MHz : -35.370
Max. Value at 4002.0 MHz : -35.371
Max. Value at 4003.0 MHz : -35.313
Max. Value at 4004.0 MHz : -35.241
Max. Value at 4005.0 MHz : -35.188
Max. Value at 4006.0 MHz : -35.077
Max. Value at 4007.0 MHz : -34.964
Max. Value at 4008.0 MHz : -34.802
Max. Value at 4009.0 MHz : -34.577
Max. Value at 4010.0 MHz : -34.347
Max. Value at 4011.0 MHz : -34.106
Max. Value at 4012.0 MHz : -33.773
Max. Value at 4013.0 MHz : -33.499
Max. Value at 4014.0 MHz : -33.289
Max. Value at 4015.0 MHz : -33.163
Max. Value at 4016.0 MHz : -33.038
Max. Value at 4017.0 MHz : -32.974
Max. Value at 4018.0 MHz : -32.941
Max. Value at 4019.0 MHz : -32.970
Max. Value at 4020.0 MHz : -32.913
Max. Value at 4021.0 MHz : -32.829
Max. Value at 4022.0 MHz : -32.795
Max. Value at 4023.0 MHz : -32.805
Max. Value at 4024.0 MHz : -32.885
Max. Value at 4025.0 MHz : -32.939
Max. Value at 4026.0 MHz : -33.064
Max. Value at 4027.0 MHz : -33.199
Max. Value at 4028.0 MHz : -33.337
Max. Value at 4029.0 MHz : -33.483
Max. Value at 4030.0 MHz : -33.656
Max. Value at 4031.0 MHz : -33.830
Max. Value at 4032.0 MHz : -33.992
Max. Value at 4033.0 MHz : -34.175
Max. Value at 4034.0 MHz : -34.362
Max. Value at 4035.0 MHz : -34.555
Max. Value at 4036.0 MHz : -34.726
Max. Value at 4037.0 MHz : -34.893
Max. Value at 4038.0 MHz : -35.080
Max. Value at 4039.0 MHz : -35.218
Max. Value at 4040.0 MHz : -35.424
Max. Value at 4041.0 MHz : -35.564
Max. Value at 4042.0 MHz : -35.700
Max. Value at 4043.0 MHz : -35.749
Max. Value at 4044.0 MHz : -35.735
Max. Value at 4045.0 MHz : -35.665
Max. Value at 4046.0 MHz : -35.505
Max. Value at 4047.0 MHz : -35.261
Max. Value at 4048.0 MHz : -34.974
Max. Value at 4049.0 MHz : -34.658
Max. Value at 4050.0 MHz : -34.302
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