| 用缺陷地结构抑制圆极化微带天线的谐波 |
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| 引用本文： | 江超,杨雪霞,白巧玲. 用缺陷地结构抑制圆极化微带天线的谐波[J]. 无线电通信技术, 2010, 36(3): 24-27 |
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| 作者姓名： | 江超 杨雪霞 白巧玲 |
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| 作者单位： | 上海大学,通信与信息工程学院,上海,200072 |
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| 基金项目： | 上海市大学创新活动计划项目经费(CXXJ08-034)资助课题 |
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| 摘 要： | 设计了将缺陷地结构(DGS)用于圆极化微带天线以实现谐波抑制功能。方形切角贴片激励圆极化波,50Ω微带线下的双"哑铃"型DGS实现二次谐波的抑制。天线的仿真结果和加工测试基本吻合。经测试,天线的中心频率为5.8 GHz,小于-10 dB的S11带宽为200 MHz,二次谐波频段抑制在-3.45 dB以内;天线的最大增益为6.3 dBi,波瓣前后比为13 dB,3 dB轴比带宽为70 MHz。该天线用于射频前端,可实现射频前端的小型化。
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| 关 键 词： | 微带天线 圆极化 谐波抑制 缺陷地结构 |
Harmonics Suppression of Circularly Polarized Microstrip Antenna by Defected Ground Structure |
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| JIANG Chao,YANG Xue-xia,BAI Qiao-ling. Harmonics Suppression of Circularly Polarized Microstrip Antenna by Defected Ground Structure[J]. Radio Communications Technology, 2010, 36(3): 24-27 |
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| Authors: | JIANG Chao YANG Xue-xia BAI Qiao-ling |
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| Affiliation: | (School of Communications and Information Engineering, Shanghai University, Shanghai 200072, China) |
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| Abstract: | Harmonics suppression of circularly polarized microstrip antenna by defected ground structure （DGS） is proposed in this paper. Circular polarization is excited by an angle-cut square patch. The second harmonic is suppressed by two dumbbell-shaped DGS under 50 ohm microstrip line. The result of measurement coincides with that of simulation, the bandwidth of S11 less than - 10 dB is 200 MHz with the centre frequency of 5.8 GHz,and the second harmonic is within - 3.45 dB .The maximum gain is 6.3 dBi and the front-to-back ratio is 13 dB with 70 MHz circular polarized bandwidth（ axial ratio 〈 3 dB）. The antenna can be applied in RF front-end to realize miniaturization. |
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| Keywords: | microstrip antenna circularly polarization harmonic suppression defected ground structure （DGS） |
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