This paper presents three configurations of broadband differentially fed microstrip antenna for GSM1800, 1900 and 2100 MHz. The antennas are designed and fabricated using two different substrates for bottom and upper layer. The three antennas designed and tested have gain of 9.88, 9.66, and 11.14 dBi, respectively, at the center frequency. The proposed antennas also find its implementation in areas where, differential inputs/outputs wireless communication circuits are needed. Later, a differentially driven RF power harvesting system with maximum efficiency of 71%, 67% and 78% for a load of 520 Ω is also designed and developed.

中文翻译：

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差分微带贴片整流天线，在较宽的工作带宽内具有一致的高增益

本文介绍了用于GSM1800、1900和2100 MHz的宽带差分馈电微带天线的三种配置。使用用于底层和上层的两种不同的基板来设计和制造天线。设计和测试的三个天线在中心频率分别具有9.88、9.66和11.14 dBi的增益。所提出的天线也在需要差分输入/输出无线通信电路的区域中找到了其实施方案。后来，还设计并开发了一种差分驱动的射频功率采集系统，该系统在520Ω负载下的最高效率为71％，67％和78％。