Shaping-based cover wave feed source design method

By designing a shape-based radome feed and adjusting the excitation of the feed array elements using Fourier transform, a delta function shape radiation pattern is constructed, solving the reliability and efficiency problems of reflector antennas and achieving high-efficiency antenna performance and low-cost system design.

CN122088035APending Publication Date: 2026-05-26BEIJING RES INST OF TELEMETRY
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Patent Information

Application Number
CN202511959539.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-24
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In existing technologies, reflector antennas suffer from low reliability and high cost during folding and storage, and conventional feed patterns cannot achieve optimal efficiency at the same time, resulting in limited antenna efficiency.

Method used

A pattern-based shrouded feed is designed using a Fourier transform-based pattern synthesis method. The feed pattern is constructed with a delta function shape. By adjusting the excitation amplitude and phase of the feed array elements, the feed energy is mainly contained within the sub-plane, thereby improving antenna efficiency.

Benefits of technology

It significantly improves antenna efficiency to nearly 90%, reduces engineering implementation difficulty and system construction costs, enhances system reliability, and is suitable for mobile measurement and control and high-code-rate remote sensing data transmission systems.

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Abstract

The invention provides a shaping-based cover wave feed source design method, which comprises the following steps of: reversely synthesizing to obtain the excitation amplitude and phase of each array element by using a Fourier transform-based directional diagram synthesis method, and endowing each array element with the obtained excitation amplitude and phase of each array element to obtain a shaped cover wave feed source. And performing full-wave simulation on the array in electromagnetic simulation software to obtain a directional diagram of the array, comparing the directional diagram with an expected feed source directional diagram, and if deviation exists, adjusting the excitation amplitude and the phase until the coincidence degree with the expected feed source directional diagram reaches a target. Near 90% of efficiency is obtained after the feed source irradiates the reflecting surface and is far higher than the efficiency of a conventional feed source irradiating the reflecting surface; in addition, different excitation coefficients can be flexibly constructed for different frequency points, and high-precision approximation of an ideal delta function can be realized in a broadband range; higher gain can be obtained under the same aperture, or the aperture size of the reflector antenna can be reduced under the same gain requirement; the system performance can be obviously improved, and the system reliability is improved.
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