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针对无线电监测系统的低频覆盖不足与天线尺寸问题，基于改进型的偶极子结构提出一种小型化超宽带接收天线。设计采用曲流技术弯折偶极子双臂(尺寸38.6 mm×134.1 mm×0.8 mm),结合对称寄生单元与挖孔结构优化电流分布，实现带宽扩展。CST仿真与实测结果表明，天线在0.7～0.96 GHz及1.3～5.3 GHz频段S11<-6 dB,覆盖GSM、DCS-1800、WLAN、WiMAX及5G NR n77/n78/n79等标准；2.2 GHz和4.4 GHz辐射效率分别达96.42%和95.63%,5G Sub-6 GHz平均效率85.4%±6.8%;3.3～5.0 GHz最大增益达(4.23±0.54)dBi,较传统偶极子提升1.8 dBi。该设计通过结构创新解决了低频段覆盖与小型化矛盾，适用于多制式通信监测场景。
Abstract：To address the issues of insufficient low-frequency coverage and oversized antennas in radio monitoring systems, a miniaturized ultra-wideband receiving antenna based on improved dipole structure is proposed.The design employs meandering techniques to bend the dipole arms(dimensions: 38.6 mm×134.1 mm×0.8 mm),integrating symmetrical parasitic elements and slotted structures to optimize current distribution and extend bandwidth.CST simulations and measurements demonstrate that the antenna achieves S11 <-6 dB across 0.7～0.96 GHz and 1.3～5.3 GHz bands, covering standards such as GSM,DCS-1800,WLAN,WiMAX,and 5G NR n77/n78/n79.The radiation efficiency reaches 96.42% at 2.2 GHz and 95.63% at 4.4 GHz, with 85.4%±6.8% average efficiency in 5G Sub-6 GHz bands.The maximum gain of(4.23±0.54)dBi(3.3～5.0 GHz) surpasses conventional dipoles by 1.8 dBi.This structural innovation resolves the low-frequency coverage vs miniaturization trade-off, enabling multi-standard communication monitoring.
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基本信息:
中图分类号:TN820;TN98
引用信息:
[1]王毳,吴丹,王魁.一种用于无线电监测的小型化接收天线设计[J].无线电工程,2025,55(11):2236-2242.
2025-11-05
2025-11-05