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Method for designing conformal array antennas distributed in aperture field of spherical cap

A technology of conformal array and design method, which is applied in the direction of antenna, antenna array, antenna grounding switch structure connection, etc., can solve the problems of narrow beam scanning range and little influence on aerodynamic performance, and achieve the effect of simple and effective model

Inactive Publication Date: 2013-06-26
ZHEJIANG UNIV
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Problems solved by technology

[0003] Conformal antennas have the advantages of low profile, light weight, and easy installation on the surface of aircraft. Today, with the continuous development of antenna technology, conformal antennas are more and more used in many fields. Among them, due to their unique advantages, conformal antennas It is widely used in modern radars: firstly, it conforms to the surface of its carrier, and has little effect on the aerodynamic performance of the carrier itself; secondly, under the condition of ensuring the performance of the antenna, the use of conformal antenna can simplify the antenna installation; and currently There are still many problems in the commonly used planar phased array antenna, such as: narrow beam scanning range, mutual coupling effect between antenna elements is related to scanning angle, etc.

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  • Method for designing conformal array antennas distributed in aperture field of spherical cap
  • Method for designing conformal array antennas distributed in aperture field of spherical cap
  • Method for designing conformal array antennas distributed in aperture field of spherical cap

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Embodiment

[0038] Such as Figure 4 As shown, the spherical conformal array antenna layout structure composed of three circular arrays is adopted, Figure 5 It is the distribution map of the entire spherical conformal array antenna mapped to the plane. There are 4 antenna units on the innermost concentric ring, 8 antenna units on the middle concentric ring, and 12 antennas on the outermost concentric ring. unit, r 1 、r 2 、r 3 are the radii of the innermost circle, the middle circle, and the outermost circle of concentric rings, respectively. Assuming the steradian parameter α of the spherical crown aperture 0 =5°, the radius R of the corresponding ball of the spherical crown caliber 0 is 28.68 λ, λ is the wavelength corresponding to the center frequency, and the maximum radius of the spherical crown aperture mapped to the plane is a= R 0 *sin(α 0 )=2.5λ.

[0039] Such as figure 2 As shown, where P is the internal weighting parameter, the abscissa α is the spherical degree of th...

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Abstract

The invention discloses a method for designing conformal array antennas distributed in an aperture field of a spherical cap. The method includes distributing antenna arrays on the spherical cap; adjusting distribution of the aperture field by a parameter weighting process on the basis of a Bessel function to acquire continuous distribution of the aperture field for shaping different types of beams; and computing radiuses of circles in two or more circular arrays corresponding to the different types of beams by a discrete process and exciting antenna units. The aperture field is distributed on the spherical cap comprising the circular arrays, circle centers of the circular arrays are distributed on a connecting line between the vertex and the spherical center of the spherical cap, and at least three antenna units are arranged on each circle of each circular array and are in central symmetry with one another, and the antenna units are uniformly distributed on the spherical cap. The method can be used for designing spherical conformal array antennas, computation such as complicated coordinate transformation and an unordered multi-dimensional optimization procedure are omitted, the method can be widely applied to designing conformal array antennas for phased array radar, warships and the like, and the beams can be quickly shaped.

Description

technical field [0001] The invention relates to a design method of a conformal array antenna, in particular to a design method of a conformal array antenna with spherical crown aperture field distribution. Background technique [0002] With the development of wireless communication and modern military technology, the research of conformal antenna, an antenna system that can conform to the shape of the carrier, is getting more and more attention. The array antenna is composed of many antenna elements, and these antenna elements are conformal to the surface of the object to reduce or eliminate the influence of the dynamic performance of suffocation. This antenna is called a conformal antenna. [0003] Conformal antennas have the advantages of low profile, light weight, and easy installation on the surface of aircraft. Today, with the continuous development of antenna technology, conformal antennas are more and more used in many fields. Among them, due to their unique advantage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/00H01Q1/50
Inventor 徐魁文李欢孟庆阳皇甫江涛冉立新
Owner ZHEJIANG UNIV
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