光学
微波食品加热
光圈(计算机存储器)
通信卫星
梁(结构)
物理
材料科学
卫星
计算机科学
电信
声学
天文
作者
Huaxiong Huang,Shuai-Nan Li
出处
期刊:Optics Letters
[The Optical Society]
日期:2020-09-11
卷期号:45 (18): 5165-5165
被引量:13
摘要
This Letter presents a single-layer, dual-frequency unit for generating orbital angular momentum (OAM) in the microwave range. The unit cell consists of a square frame and two concentric rings with branches. The developed units can produce multifunctional OAM with required OAM mode, beam number, and direction. To demonstrate this versatility, three reflectarrays operating at dual frequencies are designed, and one is fabricated and measured to validate the design. The reflectarray has the following advantages: high gain (15.4dBi at 10 GHz, 20.3dBi at 20 GHz), high aperture efficiency (13.53% at 10 GHz, 10.33% at 20 GHz), low divergence angle (7.5°at 10 GHz, 6° at 20 GHz), small size, and compactness in the form of a single-layer structure. The designed multifunctional reflectarray has potential applications in remote sensing, point-to-point communication, satellite communications, and others.
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