hello,
i am trying to build a system that transmit a signal (10GHz) and the signal hits a reflective object(that changes its position in a sinusoidal manner, much slower than 10GHZ, close to 1Hz), and comes back to the Rx antenna.
my goal is to identify the phase (modulo 2 pi) that the signal acquire. (the phase is related to the object's position).
in order to do that, after the Rx antenna i put an IQ mixer and feed the LO with a replica of the RF signal that i send, using a wilkinson power splitter before i send the signal.
Therefore, in the IF port i will get near DC frequencies and my wanted data is almost DC (i am thinking close to a 1Hz, is it considered DC?).
My biggest concern is that, i will get LO leakage through the RF and hence i will get DC offset that i would normally be able to get rid off, but the problem is that my desired data is also DC. So i would not be able to distinguish between the data DC and the LO leakage DC.
I would gladly accept your wisdom and help.
thank you.
i am trying to build a system that transmit a signal (10GHz) and the signal hits a reflective object(that changes its position in a sinusoidal manner, much slower than 10GHZ, close to 1Hz), and comes back to the Rx antenna.
my goal is to identify the phase (modulo 2 pi) that the signal acquire. (the phase is related to the object's position).
in order to do that, after the Rx antenna i put an IQ mixer and feed the LO with a replica of the RF signal that i send, using a wilkinson power splitter before i send the signal.
Therefore, in the IF port i will get near DC frequencies and my wanted data is almost DC (i am thinking close to a 1Hz, is it considered DC?).
My biggest concern is that, i will get LO leakage through the RF and hence i will get DC offset that i would normally be able to get rid off, but the problem is that my desired data is also DC. So i would not be able to distinguish between the data DC and the LO leakage DC.
I would gladly accept your wisdom and help.
thank you.