This paper proposes a new feeding topology with internal 180° phase reversal for wideband series‐fed slot array antennas. As a demonstration, a serial fed, half‐wavelength separated, 7‐element array is designed at 5.8 GHz. Comparing with conventional series‐fed arrays, which require one‐wavelength separation, the phase difference between adjacent elements varies less with frequency. Thus, the proposed array has more stable beam pointing and wider 1 dB gain bandwidth. A prototype was fabricated and measured to validate the performance of the feeding topology. A wide operating bandwidth of 22.4% for S11 < −10 dB, a 1 dB gain bandwidth of 14% and bi‐directional peak gain of 10.01 dBi are achieved with the array length of 2.7λ₀. The proposed feeding topology shows its potentials in realizing signal coverage on some special occasions, such as coal mines and tunnels.

中文翻译：

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具有内部180°相位反转的新型馈电拓扑，适用于宽带串联馈送缝隙阵列天线

本文针对宽带串联馈送缝隙阵列天线提出了一种具有内部180°相位反转的新型馈电拓扑。作为演示，一个串行馈电，半波长分离的7元素阵列设计为5.8 GHz。与需要单波长分离的常规串联馈电阵列相比，相邻元件之间的相位差随频率变化较小。因此，提出的阵列具有更稳定的波束指向和更宽的1 dB增益带宽。制作并测量了原型，以验证馈电拓扑的性能。的22.4％为S11 <-10分贝，14％和10.01 dBi的双向峰值增益1个dB的增益带宽很宽的工作带宽与2.7阵列长度来实现λ ₀。拟议的馈电拓扑显示了在某些特殊场合（例如煤矿和隧道）实现信号覆盖的潜力。