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A dual-polarized feed for broadband ridged quadrature mode converter

An orthogonal mode, converter technology, applied in the circuit, electrical components, radiating element structure and other directions, can solve the problem of the deviation of the installation position of the dielectric rod, the improvement effect of the corrugated groove on the mouth surface is not reflected, and the test results are deteriorated.

Active Publication Date: 2020-10-20
BEIHANG UNIV
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Problems solved by technology

However, in the physical test, if the ridges perpendicular to the four inner walls of the horn antenna are not aligned, or the installation position of the dielectric rod deviates, the cross-polarization test results will be greatly deteriorated. The improvement effect of the slot is basically not reflected

Method used

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  • A dual-polarized feed for broadband ridged quadrature mode converter
  • A dual-polarized feed for broadband ridged quadrature mode converter
  • A dual-polarized feed for broadband ridged quadrature mode converter

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Embodiment Construction

[0024] The present invention is conceived as follows: since the central ridge 3 is introduced into the ridge horn antenna, the cross-polarization ratio of the antenna can be reduced, and by changing the distance between the central ridge 3 and the curve profile of the four side ridges 1 and the gap between the two, it can be obtained at the same time. Good impedance broadband and low cross-polarization ratio, and the central ridge 3 makes the electric field of the high-frequency part produce phase taper, which can further increase the beam width of high-frequency. Adjust the height of the antenna extension surface 4 to further reduce the standing wave of the low frequency part while maintaining the beam width of the high frequency part. By adjusting the single ridge in the ridged orthogonal mode converter and the narrow slot 6 formed by the matching prism 2 and the inner wall of the waveguide to feed the ridged horn antenna, a good impedance matching with as wide a bandwidth as...

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Abstract

The invention relates to a dual-polarization feed source fed by a broadband ridged orthogonal mode converter. The dual-polarization feed source comprises a ridged horn antenna and an orthogonal mode converter integrated with the antenna, wherein the orthogonal mode converter is matched and connected with four side ridges (1) of the horn antenna, and a matching frustum (2) in the middle of the orthogonal mode converter extends to form a central ridge (3) of the horn antenna. Based on the structure, the toroidal field components formed by the four side ridges (1) of the horn antenna can be effectively suppressed, so that the cross polarization performance of the whole feed source antenna can be optimized, an electric field of the high frequency part generates a phase taper, and the beam width of the high frequency can be further improved. In addition, a port where the ridged horn antenna normally radiates outwards and the taper is arranged is provided with a section of extended mouth surface (4) that vertically extends outwards, and a good low-frequency standing wave matching effect is achieved. The input end of the orthogonal mode converter can be connected with a feed waveguide, orcan be connected with the waveguide and fed by a coaxial cable after coaxial conversion, wherein the feed waveguide can have a rectangular cross section or an elliptical cross section.

Description

technical field [0001] The invention relates to the technical field of a broadband compact field feed source, in particular to a dual-polarization feed source fed by a broadband ridged orthogonal mode converter. Background technique [0002] With the continuous development of compact field technology, the test efficiency of compact field system has been continuously improved, and the speed of both sweep frequency measurement and spot frequency measurement has been greatly improved. Therefore, the original standard band feed cannot meet the requirements of compact field measurement. requirements. Broadband compact field feeds will become an essential measurement tool for future compact field systems. As one of the candidate antennas for ultra-broadband compact field, the ridge horn antenna has a wide impedance bandwidth and has the potential to be used as a compact field feed source objectively. However, the performance of the ridge horn antenna pattern varies greatly with f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q13/02H01Q5/25H01Q5/307H01Q1/36
Inventor 胡乂丹王正鹏
Owner BEIHANG UNIV
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