DEVICE FOR RECEPTION OF ORTHOGONAL LINEARLY POLARIZED WAVES Russian patent published in 2017 - IPC H01P1/16 

FIELD: physics.

SUBSTANCE: device contains two low-noise amplifiers, a bridge device, as well as coaxially located and interconnected a segment of a circular waveguide and a coupler of orthogonal linearly polarized waves, made on a circular waveguide and equipped with a short-circuit. In this case, a phase-shifting inhomogeneity located at the end of a dielectric rod passed through an aperture of radius r<0.1R in a short-circuit with the possibility of axial rotation, where R is the radius of a circular waveguide, is located in the circular waveguide section. In the wall of the coupler of orthogonal linearly polarized waves, two communication holes are made, connected through identical segments of the rectangular waveguide to the input arms of the bridge device, and with the centers located in one transverse plane lying at a distance λv/4 from the reflective surface of the short-circuit, and at a distance πR/2 one from the other, where λv is the wavelength in the circular waveguide at the mean operating frequency. The phase-shifting inhomogeneity is selected in such a way as to ensure a phase shift of 90°, and the bridge device is made in the form of an unbalanced quadrature waveguide bridge, whose input arms through identical sections of the rectangular waveguide and identical to the low-noise amplifiers are connected to couplers of the coupler of orthogonal linearly polarized waves, so that the inputs of low-noise amplifiers are located at the closest distance from the coupler couplers of orthogonal linearly polarized waves.

EFFECT: reduction of the noise temperature of the device for receiving orthogonal linearly polarized waves.

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