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The mixer module of radiometers of millimeter and submillimeter-wave with the resonator matching of the nonlinear element

When you create a radiometer to a fixed frequency band the mixing module, in which the radiation of signal and of local oscillator (LO) arrive at the non-linear element from both directions is preferable [1]. The filters may be installed from the side of LO and the side of antenna in such mixer module [2]. Filters have several functions The first filter transmits radiation LO to the nonlinear element and works as a matching backshort of signal, as well as rejects noise of LO in the frequency band of signal. The second filter transmits signal to the non-linear element and functions as a LO matching backshort, as well as stops the LO radiation.