Airship platform meter-wave conformal phased array antenna based on characteristic mode theory

A eigenmode and array antenna technology, which is applied to antennas suitable for movable objects, specific array feeding systems, antennas, etc., to achieve the effects of improving impedance matching characteristics, good conformality, and improving radiation efficiency

Active Publication Date: 2022-04-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Application Information

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Problems solved by technology

However, these designs are limited to single-antenna system designs with fixed beams or a limited number of beams

Method used

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  • Airship platform meter-wave conformal phased array antenna based on characteristic mode theory
  • Airship platform meter-wave conformal phased array antenna based on characteristic mode theory
  • Airship platform meter-wave conformal phased array antenna based on characteristic mode theory

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Embodiment Construction

[0033]The technical solutions in the examples of the present invention will be specifically described below in conjunction with the accompanying drawings in the examples of the present invention, so that those skilled in the art can understand the present invention.

[0034] Due to the existing process of covering the airship with a metal layer to block the external environment, the airship model adopts an all-metal structure, such as figure 1 As shown, it includes four parts: airbag, hanger, propulsion device and empennage. The eigenmode analysis of the airship platform structure at the corresponding frequency shows that 90 significant modes are easy to be excited. Such as Figure 4 (a)-(d) show the mode current and electric field of any four prominent modes of the platform. These modes have partial directional characteristics, however, a single mode cannot meet the expected high directivity requirements, so a weighted combination of multiple modes is required to achieve th...

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Abstract

The invention discloses an airship platform meter-wave conformal phased-array antenna based on a characteristic mode theory, which is characterized in that the meter-wave conformal phased-array antenna with high gain, low cross polarization and large-angle scanning is systematically designed based on the characteristic mode theory. A target directional diagram is synthesized by using a multi-target optimization algorithm according to the obvious characteristic mode of the airship platform, and an antenna unit is designed and placed according to the current distribution of a comprehensive result. The meter-wave conformal phased-array antenna provided by the invention has the advantages that the radiation performance requirement of the antenna, the conformal requirement with a platform and the large-angle scanning requirement can be met at the same time. The inherent radiation mechanism of the platform is clearly displayed on the physical level, and the method can be flexibly applied to the design of low-frequency platform phased-array antennas with different platform structures.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a meter-wave conformal phased array antenna for airship platforms based on eigenmode theory. Based on the theory of electromagnetic eigenmodes, a new idea for the design of meter-wave conformal phased arrays based on characteristic radiation modes of airship platforms is proposed. , which can provide important theoretical, method and technical support for the development of meter-wave conformal phased array antennas for airborne platforms. Background technique [0002] In modern military warfare, the trend of long-range precision, intelligence, stealth, and unmanned weapons and equipment is obvious, and the combat performance of high-altitude aircraft largely depends on the radar phased array antenna it carries. The research on meter-wave radar was temporarily ignored after the emergence of decimeter-wave and centimeter-wave radars with higher precision (such as X-band radar). On...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q1/28H01Q21/00
CPCH01Q1/38H01Q1/50H01Q1/285H01Q21/0006H01Q21/0087
Inventor 陈益凯杨子健杨仕文
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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