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Implementation method and system of Ku frequency band ultralow cross polarization multi-beam antenna

A technology for multi-beam antennas and implementation methods, which is applied to the manufacture of antenna array devices, antennas, antenna arrays, etc., can solve problems such as inability to apply multi-beam systems, affect the pattern, and deteriorate gain performance, so as to ensure high-gain coverage, Effect of Improving Cross-polarization Isolation

Active Publication Date: 2019-12-24
XIAN INSTITUE OF SPACE RADIO TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Although this method can improve cross-polarization, it cannot be applied to multi-beam systems, and the pattern of the main polarization will be affected during the shaping process, deteriorating the gain performance

Method used

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  • Implementation method and system of Ku frequency band ultralow cross polarization multi-beam antenna
  • Implementation method and system of Ku frequency band ultralow cross polarization multi-beam antenna
  • Implementation method and system of Ku frequency band ultralow cross polarization multi-beam antenna

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing, to design an ultra-low cross-polarized multi-beam antenna, the present invention is described in further detail, as figure 1 Shown:

[0028] (S1) Determine antenna parameters, including reflector aperture D, focal length F, and offset distance H. Determine the reflector aperture D according to the beam width, select the maximum focal length F within the range required by the satellite layout, and determine the offset distance H under the condition that the field of view of the antenna does not interfere with the structure of the feed array.

[0029] Use the beam with beam width θ=1.1° to cover the designated area, and combine the gain requirements and beam width, choose the antenna aperture D as 1.5m. Since a large focal-diameter ratio can obtain lower cross-polarization, considering the size and layout of the satellite, the focal-diameter ratio F / D is selected as 1.6, and the focal length F of the antenna is 2.6m. In or...

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Abstract

The invention relates to an implementation method and system of a Ku frequency band ultralow cross polarization multi-beam antenna. The antenna is based on a single-aperture multi-beam antenna technology and comprises a reflector, a polarization grid plate and a feed source array. The multi-beam antenna and the polarization grid plate are combined, various parameters of the polarization grid plateare optimally designed, the maximum efficiency transmission of main polarization and the highest suppression of cross polarization are ensured, the cross polarization isolation (XPD) of the multi-beam antenna is greatly improved, and high-gain coverage of a specified area is also ensured.

Description

technical field [0001] The invention belongs to the technical field of space-borne antennas, and in particular relates to a method and system for realizing a Ku-band ultra-low cross-polarization multi-beam antenna. Background technique [0002] In order to improve broadband communication satellite technology, support fast backhaul of small terminals, and enable it to support various data communications such as sea, land, and air, multi-beam technology is required. However, due to the limited use of frequencies in the coverage area, most satellites have different antenna polarization multiplexing designs, so there is polarization interference between different antennas of a satellite. In order to ensure the normal use of the system, it is necessary to study a new type of multiplexing Beam antenna to achieve ultra-low cross-polarization characteristics to meet system requirements. [0003] At present, the design methods for reducing multi-beam cross-polarization at home and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50H01Q1/28H01Q19/10H01Q21/00
CPCH01Q21/00H01Q21/0087H01Q19/10H01Q1/288Y02D30/70
Inventor 陶啸丁伟薛兆璇赵颖高美丽崔蕾
Owner XIAN INSTITUE OF SPACE RADIO TECH
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