Dual-linear polarization feed source horn

Abstract

The embodiment of the invention discloses a dual-linear polarization feed source horn. The horn comprises a dual-groove corrugated horn unit, a square-to-circle transition waveguide and a quadrature coupler unit which are connected in sequence; the double-groove corrugated horn unit comprises a transmission waveguide and a double-groove feed source horn; the transmission waveguide is connected with the square-to-circle transition waveguide and the double-groove feed source horn; the quadrature coupler unit comprises a first input interface, a second input interface, a first Chebyshev transition waveguide connected with the first input interface, a first turning waveguide connected with the first Chebyshev transition waveguide through a first T-shaped junction, and a second Chebyshev transition waveguide connected with the second input interface. The second turning waveguide is connected with the second Chebyshev transition waveguide through a second T-shaped junction; and the first turning waveguide and the second turning waveguide are connected with the square-round transition waveguide through a cross rotary junction. The dual-linear polarization feed source horn is simple in structure, small in size and wide in working bandwidth, and has good cross polarization performance.

Description

Technical field[0001]This application relates to the technical field of feed antennas, in particular to a dual-line polarization feed horn.Background technique[0002]With the development of modern communication systems, dual-line polarized feed horns can use the fundamental mode ports of the orthogonal mode coupler as the receiving and transmitting ends of the signal respectively, thereby realizing the function of a duplexer; polarization diversity can be used Technology to improve the stability of the communication system in a complex electromagnetic environment; at the same time, it can also use multi-polarized information to improve the detectability of radar. However, for the dual-line polarization feed of the waveguide structure, its size is usually large. Due to the self-dispersion effect of the waveguide, the parasitic passband of the waveguide bandpass filter is very close to the designed passband, so it is difficult to obtain a wider operating bandwidth. . The miniaturizatio...

AI Technical Summary

Problems solved by technology

However, the dual-wire polarized feed horn with OMT structure adopts The form of the junction leads to its complex structure, large size, and poor cross-polarization performance, and the isolation of the two ports is not high, and the phase center is unstable

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