18-40GHz low sidelobe dual-polarized horn antenna

A horn antenna and dual-polarization technology, applied in the field of horn antennas, can solve the problems of antenna high sidelobe level, difficult impedance matching of working frequency band, splitting of frequency point pattern, etc., to expand bandwidth, reduce debugging difficulty, and improve direction Figure effect

Active Publication Date: 2020-04-07
NANJING CHANGFENG AEROSPACE ELECTRONICS SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

However, for the ultra-wideband horn antenna loaded with ridges, the impedance matching in the working frequency band is difficult. At the same time, the uniform field distribution of th

Method used

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  • 18-40GHz low sidelobe dual-polarized horn antenna
  • 18-40GHz low sidelobe dual-polarized horn antenna
  • 18-40GHz low sidelobe dual-polarized horn antenna

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Embodiment

[0040] Such as Figure 7As shown, the diagonal speaker housing 1 is relatively fixed by two trapezoidal grooves 101 that gradually widen from bottom to top and through side connecting bars 102 . A connecting portion 103 is provided at the bottom of the trapezoidal slot 101 to connect with the flange 209 at the top of the square waveguide 201 . The four corners of the square waveguide 201 are set as vertical corners 210, and bolts are inserted from the screw holes on the vertical corners 210 into the ridge screw holes 207 on the back of each ridge, and the four ridges are fixed in the square waveguide 201 in a cross shape. The bottom of the square waveguide 201 is socketed on the boss 301, and the bottom of the outside of the square waveguide 201 is provided with a mounting seat 211, and the two adjacent sides of the mounting seat 211 are fixed with a first radio frequency connector 401 and a second radio frequency connector 402 by bolts, A vertical screw hole 212 is provided ...

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Abstract

The invention discloses an 18-40GHz low sidelobe dual-polarized horn antenna. A diagonal horn shell, a four-ridge waveguide section and an end cover are connected in sequence; the four-ridge waveguidesection comprises a square waveguide, four ridge sheets are fastened at four corners in the square waveguide through screws, and the four ridge sheets are in a cross shape; a feed probe of a radio frequency connector is inserted into the ridge sheets from the outer side of the square waveguide. An end cover is provided with a boss, the boss is provided with a reflection cavity, and the square waveguide is sleeved on the boss. The antenna also comprises an adjusting screw, and the adjusting screw extends into the reflection cavity from the bottom of the end cover. According to the invention, the antenna has a good application prospect in the field of electronic measurement, adopts a dual-port structure, can transmit or receive two orthogonal polarization waves, has a working bandwidth of more than 9: 1 octave and a sidelobe level of-25dB, and can be applied to detection systems such as high-resolution radars and the like.

Description

technical field [0001] The invention relates to a 18-40GHz low sidelobe dual-polarized horn antenna, which belongs to the technical field of horn antennas. Background technique [0002] The ultra-wideband double-ridge horn antenna is widely used in electronic measurement, military and civilian fields due to its high gain and wide frequency bandwidth. However, when the double-ridge horn antenna is used as a receiving antenna, it needs to rotate to receive electromagnetic waves of different polarization Antenna orientation, avoid orthogonal isolation, which will lead to inefficiency. [0003] Sidelobe level is an important factor in antenna design, and low-sidelobe antennas have become an important part of high-performance electronic measurement systems. During the radar detection process, the clutter received by the side lobe of the antenna is superimposed with the clutter received by the main lobe, which increases the intensity of the clutter and seriously affects the radar...

Claims

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Application Information

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IPC IPC(8): H01Q13/02H01Q1/50H01Q1/36H01P3/123
CPCH01Q13/025H01Q1/50H01Q1/36H01P3/123
Inventor 陈西洋李东明陈银言
Owner NANJING CHANGFENG AEROSPACE ELECTRONICS SCI & TECH
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