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A design method of an elliptical beam Cassegrain antenna

A Cassegrain antenna and elliptical beam technology, applied in computing, instrumentation, electrical digital data processing, etc., can solve the problems that the elliptical aperture is no longer applicable, it is difficult to quickly find the mouth-surface field distribution and transition function, and the efficiency is low. Achieve the effects of improving design performance, novel ideas and high efficiency

Active Publication Date: 2019-03-01
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

Conventional classical surface fields have generalized Taylor displacement distribution, exponential distribution, Hansen distribution and other forms, but these forms are only suitable for circular aperture antennas, and are no longer applicable to elliptical apertures
For this reason, a trial-and-error method has been developed in the prior art to optimize the mouth surface field and transition function, but this method is very inefficient and it is difficult to quickly find the optimal mouth surface field distribution and transition function

Method used

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  • A design method of an elliptical beam Cassegrain antenna
  • A design method of an elliptical beam Cassegrain antenna
  • A design method of an elliptical beam Cassegrain antenna

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Embodiment Construction

[0054] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0055] An elliptical beam Cassegrain antenna design method includes the following steps:

[0056] (A1) Parameterize the oral surface field function and transition function in the long and short axis planes:

[0057] The control point parameters of two non-uniform rational B-spline curves (ie, NURBS curves) are used to express the oral surface field functions in the long and short axis planes, respectively:

[0058] with

[0059] In the formula, F 90° (u) and F 0° The functional form of (u) is the NURBS surface field curve of order k, where ω i Is the weight factor, d i , D′ i Respectively represent the i-th control point coordinates in the long and short axis planes. N i,k (u) is the k-th order B-spline basis function, which can be determined by the node vector U=[u 0 ,u 1 ,...u i ,...u n+k+1 ], according to the Debour-Cox recurrence formula get;

[0...

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Abstract

The invention discloses a design method of an elliptical beam Cassegrain antenna, and belongs to the technical field of satellite communication antenna design. The method comprises the steps of parameterization of a mouth surface field function and a transition function; forming population individuals by using the parameters of the mouth-surface field function and the transition function, and performing population iteration based on a DEGL algorithm; and shaping the antenna by using the optimal individual in the last generation of population to obtain the optimal design of the elliptical beamCassegrain antenna. The method provided by the invention can quickly optimize and design the high-efficiency, low-sidelobe, low-cross-polarization and large-axial-ratio elliptical beam antenna, and isan important improvement on the existing antenna design method.

Description

Technical field [0001] The invention relates to the technical field of satellite communication antenna design, in particular to a design method of an elliptical beam Cassegrain antenna. The invention can be used to design high-performance, low-profile antennas for mobile satellite stations, especially satellite communication stations with limited space, such as on-board, vehicle-mounted, and airborne. Background technique [0002] In the field of satellite communications, shaped dual-reflector antenna technology is the mainstream direction of current research. Among them, the shaped elliptical beam Cassegrain antenna is particularly concerned because it can form a large-axis ratio elliptical beam to achieve low profile and high efficiency. [0003] At present, in the design of the shaped elliptical beam Cassegrain antenna, the oral surface field and the transition function are the key elements of the design. The conventional classical aperture field has generalized Teller displac...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 刘兴隆杜彪周建寨解磊
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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