In this article, a flexible and compact tri-band microstrip antenna is proposed for vehicular wireless applications. Triangular embedded radiators are employed to provide design freedom and minimize antenna size. Aiming at the bending demand and conformal modules, flexible polyimide-based substrate is used for antenna fabrication. The measured results show that the proposed antenna operates at 1, 2.4, and 3.5 GHz, covering wireless local area network (WLAN) HaLow, WLAN, and world interoperability for microwave access bands. Benefited from its tri-band operation, compact structure and flexible design, the proposed antenna is suitable to be integrated to wireless systems. The antenna occupies a compact size of 68 mm × 71 mm × 0.11 mm. For verification, the proposed antenna is integrated to a wireless high-definition video transmission system. The system is composed of a 5-megapixel camera, a video processor, a wireless network card, the tri-band flexible antenna, and wireless terminals like smart phones. The measured results confirm high efficiency, mobility, and stability of the wireless video transmission system with the proposed antenna.

中文翻译：

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用于车载无线视频传输系统的灵活紧凑的三频天线

在本文中，提出了一种用于车载无线应用的灵活紧凑的三频微带天线。三角形嵌入式辐射器用于提供设计自由度和最小化天线尺寸。针对弯曲需求和保形模块，柔性聚酰亚胺基基板用于天线制造。测量结果表明，建议的天线工作在 1、2.4 和 3.5 GHz，覆盖无线局域网 (WLAN) HaLow、WLAN 和微波接入频段的全球互操作性。得益于其三频操作、紧凑的结构和灵活的设计，所提出的天线适合集成到无线系统中。天线体积小巧，为 68 mm × 71 mm × 0.11 mm。为了验证，建议的天线被集成到无线高清视频传输系统中。该系统由5兆像素摄像头、视频处理器、无线网卡、三频柔性天线和智能手机等无线终端组成。测量结果证实了采用所提出天线的无线视频传输系统的高效率、移动性和稳定性。