Future 4G wireless communication systems include, in their capabilities portfolio, emergency-specific needs, such as data support, broadband communication, and extremely high reliability. An emergency situation can be addressed with undoubtedly more chances of success if augmented information is enabled within the public safety communication novel capabilities. In this article, for a fully augmented information provision based on broadband transmission, a user-end (UE) communication-capabilities enhancement is addressed by deploying multiple antennas without compromising the portability and light weight of first-responder equipment. With this aim, we propose the design of a 4.9-GHz conformal antenna array at the rescuer side (integrated in a helmet) and evaluate its performance in terms of relative data rate gain. The conformal array design is based on traditional patch antennas that consider the need for deployment over an ellipsoidal surface. The antenna array is simulated and then built, and several parameter characterizations (bandwidth, radiation pattern, reflection coefficient, and MC) and measurements are undertaken to ensure the suitability of the design. Furthermore, an analysis of the specific absorption rate (SAR) is performed to guarantee that the exposure to electromagnetic fields is below the standardized levels.

中文翻译：

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未来公共安全通信共形天线的设计与分析：使能未来公共安全通信基础设施

未来的 4G 无线通信系统在其功能组合中包括特定于紧急情况的需求，例如数据支持、宽带通信和极高的可靠性。如果在公共安全通信新功能内启用增强信息，无疑可以以更多的成功机会解决紧急情况。在本文中，对于基于宽带传输的完全增强的信息提供，通过部署多个天线来解决用户端 (UE) 通信能力增强问题，而不会影响急救设备的便携性和轻量化。为此，我们建议在救援人员侧设计 4.9 GHz 共形天线阵列（集成在头盔中），并根据相对数据速率增益评估其性能。共形阵列设计基于传统的贴片天线，考虑了在椭球表面上部署的需要。对天线阵列进行仿真和构建，并进行多项参数表征（带宽、辐射方向图、反射系数和 MC）和测量，以确保设计的适用性。此外，还对比吸收率 (SAR) 进行了分析，以确保电磁场暴露低于标准水平。