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Broadband Horn Antenna Based on Stepped Four Ridges

A broadband horn, stepped technology, applied in the direction of antenna, antenna coupling, waveguide horn, etc., can solve the problems of poor port isolation, introduction of more errors, narrow bandwidth, etc.

Active Publication Date: 2020-10-27
上海莱天通信技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a dual-polarized horn antenna, the standing wave in the band is relatively small, but the bandwidth is narrow and the port isolation is poor, which is easy to introduce more errors in the measurement
Therefore, there is still room for improvement in terms of working bandwidth and port isolation

Method used

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  • Broadband Horn Antenna Based on Stepped Four Ridges
  • Broadband Horn Antenna Based on Stepped Four Ridges
  • Broadband Horn Antenna Based on Stepped Four Ridges

Examples

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Embodiment Construction

[0029] see Figure 1 to Figure 3 , the wideband horn antenna based on stepped four-ridges provided in this application includes a conical horn 1 , stepped four-ridges 2 , a bottom support block 3 and a feeding coaxial line 4 . In order to better demonstrate the internal structure of the horn antenna of the present application, figure 1 Perspective drawing was used.

[0030] The conical horn 1 includes a straight waveguide section 11 and a horn section 12 . The straight waveguide section 11 is cylindrical, with one end closed and the other open. The radius of the mouth surface of the straight waveguide section 11 is R 1 . Horn section 12 is initially in the shape of a circular truncated cone, with a height of h 3 , both ends are open, and the cross-section is a circle with a linearly increasing radius. The mouth shape of the smaller end of the cross-sectional area of ​​the horn section 12 is that the radius is R 1 The circular shape is connected to the open end of the st...

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Abstract

The invention discloses a broadband horn antenna based on a stepped quadruple-ridge. The broadband horn antenna comprises a conical horn, a stepped quadruple-ridge, a bottom supporting block and feedcoaxial lines, wherein the conical horn comprises a straight waveguide section and a horn section, one end, with a large sectional area, of the horn section is circular and is connected with four elliptical arc sections obtained by intersecting two cylinders which are orthogonal to each other, the side wall of the horn section is provided with four first through holes which are sequentially arranged at intervals of 90 degrees, the stepped quadruple-ridge is of a cross structure formed by four ridge plates in an orthogonal mode, each ridge plate comprises a plurality of sections of metal plateswhich are the same in height and gradually reduced in width, are sequentially connected to form a step shape and are provided with through holes II, and further comprises a section of metal plate with a curved outer ridge line, the bottom supporting block is of a cross structure formed by four rectangular blocks in an orthogonal mode, and the four feed coaxial lines penetrate through four throughholes III which are sequentially arranged at intervals of 90 degrees on the conical horn and are used for being electrically connected with four ridge plates of the stepped quadruple-ridge. Accordingto the invention, ultra wide band, high port isolation and high cross polarization isolation are realized.

Description

technical field [0001] This application relates to a broadband horn antenna that can be used as a probe antenna for near-field antenna measurements. Background technique [0002] Antenna measurement techniques are divided into far field (far field) measurement, near field (near field) measurement and compact antenna test range (compact antenna test range) measurement. Among them, the near-field measurement is to use a probe with known characteristics (probe, also called probe antenna, probe antenna) to measure the amplitude and phase of the antenna under test in the near-field radiation, and then obtain the far field radiation characteristics. This method overcomes the limitation of site size and improves the accuracy of measurement, so it has received extensive attention. [0003] The horn antenna (horn antenna) is often used as a probe antenna because of its simple structure, easy processing, high gain, and good symmetry of the radiation pattern. The pyramid horn antenn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/36H01Q1/50H01Q1/52H01Q5/28H01Q5/335H01Q5/55H01Q13/02
CPCH01Q1/36H01Q1/50H01Q1/52H01Q13/0275H01Q5/28H01Q5/335H01Q5/55
Inventor 周建华洪涛毛小莲支源姜文葛鲁宁李吉龙张捷俊
Owner 上海莱天通信技术有限公司
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