Lightweight paper-based planar lens for electromagnetic beam steering and planar antenna thereof

By attaching metal symbol units to a lightweight paper-based planar lens, the problems of large weight, high cost, and difficult installation of existing lens antennas are solved. This achieves a wide-angle scanning effect with high gain, narrow beam, multiple beams, and low power consumption, making it suitable for lightweight and mass-produced electromagnetic wave beam-tuning antennas.

CN119812779BActive Publication Date: 2026-01-13SOUTH CHINA UNIV OF TECH
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Patent Information

Application Number
CN202510003988.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-02
Publication Date
2026-01-13
Estimated Expiration
2045-01-02

AI Technical Summary

Technical Problem

Existing large-aperture lens antennas suffer from problems such as large weight, high cost, difficult manufacturing, narrow operating bandwidth, difficult feed installation, and limited beam scanning angle, making it difficult to achieve a lightweight design with high gain, narrow beam, multiple beams, and low power consumption.

Method used

Using a lightweight paper-based plane lens, electromagnetic waves are refracted and phase-modulated by attaching thin-film metal symbol units to the sheet-like paper base. The feed source can be installed at any position on the incident plane. Combined with the design of a movable or fixed feed source, wide-angle scanning and multi-beam effect can be achieved.

Benefits of technology

It achieves high gain, narrow beam, multiple beams, low power consumption and lightweight design, with a beam scanning angle of ±50 degrees, gain roll-off of less than 2dB, and bandwidth of up to 80%, making it suitable for mass production.

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Abstract

The application discloses a light paper-based planar lens for electromagnetic wave beam steering and a planar antenna thereof, and belongs to the technical field of antennas. The paper-based main body is formed by surrounding a periodic interval arranged cavity structure with a sheet-shaped paper-based body, and has two opposite planes, i.e. an incident plane and an emission plane of electromagnetic waves; the sheet-shaped paper-based body is distributed with symbol units of a film-shaped metal material; the symbol units are compared with the metal surface area of the symbol units in a unit volume in the paper-based main body, and the metal surface area of a unit volume in the middle of the planar lens is greater than that of the periphery of the planar lens. The planar antenna further comprises a feed source which is installed close to the incident plane; electromagnetic waves propagate in the planar lens in a curved path and converge to be emitted out of the planar lens. When the feed source moves, the application can realize wide-angle scanning of the beam, and in a scanning range of ±50 degrees, the gain of the planar antenna decreases by less than 2dB, and very high gain and aperture efficiency can be achieved.
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