Patent ID: 9735457
Date: 2017-08-15
CPC Classifications: H01P,H01Q

Claim:
1. An RF power combiner functioning as a higher-order harmonics filter, comprising: at least one pair of coaxially arranged disc-shaped metal conductors, at least one of said conductors having a central axial opening to accommodate a waveguide, wherein facing surfaces of the disk-shaped metal conductors are shaped symmetrically with respect to a plane of symmetry of the disk-shaped metal conductors to form a plurality of consecutive, radially communicating concentric cavities having isosceles trapezoids with different bases in section, with a smaller base of each trapezoid disposed closer to a central axis of the concentric cavities, wherein the number of the concentric cavities is (2 k+1), where k is a number of signal harmonics being filtered; all concentric cavities have a same radial length; all concentric cavities have a different angle at the trapezoid base, the angle being dependent on a wave impedance of a segment of a radial transmission line formed by each of the concentric cavities; a plurality of horn antennae arranged uniformly around the periphery of the disc-shaped metal conductors and connected to the disk-shaped metal conductors, the radial length of a cavity of each horn antenna of said plurality being equal to the radial length of the concentric cavity, and the outer side of each horn antenna being adapted to connect an RF module, which is a source of an RF signal and has an output in the form of a strip line; the concentric cavities in the disc-shaped metal conductors and the cavities of the horn antennae form segments of radial non-dispersive transmission lines, in which electromagnetic T-wave propagates, an impedance magnitude of each of the segments having a constant value of line impedance in a cylindrical section parallel to the central axis of the concentric cavities, which is determined by the values of complex output impedances of the RF module on analyzed harmonics.