完整英文版 CONSUMER PRODUCT SAFETY IMPROVEMENT ACT(CPSIA) OF 2008（2008年消费品安全改进法案（CPSIA））。本法案为儿童产品建立消费品安全标准和其他安全要求，并对消费品安全委员会进行重新授权和现代化。

A novel antipodal Vivaldi antenna with tapering serrated structure at the edges is proposed. Compared with traditional Vivaldi antennas without serrated structure, the gain of the designed antenna is significantly improved in the desired frequency band (4.5- 7.5 GHz). In addition, a 2 x 2 Vivaldi antenna array with an orthorhombic structure is designed and fabricated to achieve a circular polarization (CP) characteristic. With this configuration, the 3 dB axial ratio bandwidth of the array reach

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