一种新型椭圆波束天线设计技术

刘兴隆; 杜彪; 周建寨

doi:10.11999/JEIT190142

一种新型椭圆波束天线设计技术

doi: 10.11999/JEIT190142

中国电子科技集团公司第五十四研究所石家庄 050081

详细信息

作者简介:
刘兴隆：男，1986年生，博士生，工程师，研究方向为反射面天线与馈源技术

杜彪：男，1962年生，研究员，博士生导师，研究方向为反射面天线、馈源、阵列天线和超材料天线的研究与设计

周建寨：男，1975年生，高级工程师，研究方向为卫星通信天线与馈源技术

通讯作者:
刘兴隆　xinglongxidian@163.com

中图分类号: TN820
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出版历程
- 收稿日期: 2019-03-11
- 修回日期: 2019-08-09
- 网络出版日期: 2019-08-29
- 刊出日期: 2019-12-01

A Novel Shaping Design Technique of the Elliptical Beam Antenna

The 54th Research Institute of CETC, Shijiazhuang 050081, China

摘要

摘要: 针对双频段低剖面椭圆波束天线的需求，该文提出了一种新型混合结构椭圆波束天线的设计技术。该混合结构由主、副反射面内环部分构成的椭圆波束环焦天线和外环部分构成的椭圆波束卡塞格伦天线组成。该文描述了椭圆波束天线的设计思路、设计步骤和赋形计算公式，给出一个600 mm×1200 mm椭圆波束天线的设计实例，并进行了容差分析，该天线的工作频率覆盖了Ku/Ka双频段，效率达到56%以上，电压驻波比(VSWR)低于1.27，俯仰面第1旁瓣低于–12.2 dB，方位面第1旁瓣低于–14.6 dB。商业软件Grasp和CST全波仿真的结果吻合很好，证明了该新颖结构和设计方法的有效性。
- 椭圆波束天线 /
- 高效率 /
- 双频段 /
- 混合结构赋形 /
- 低电压驻波比
Abstract: In order to satisfy the requirement of elliptical beam antenna with low profile, a novel design technique of the hybrid-structural antenna with elliptical beam is proposed. The hybrid-structural antenna consists of the ring-focus elliptical antenna in inner-ring region and the Cassegrain elliptical antenna in outer-ring region. The design method, procedure and shaping formula are presented in detail. A 600 mm×1200 mm reflector antenna is designed and its tolerance analysis is also given. The results show that the novel structural antenna can operate in Ku/Ka dual bands, antenna efficiency is greater than 56% and Voltage Standing Wave Ratio (VSWR) is better than 1.27, and its side lobe levels in the EL and AZ planes are below –12.2 dB and –14.6 dB respectively. The simulated results of Grasp and CST software agree well, which verify the effectiveness of the design method.
- Elliptical beam antenna /
- High efficiency /
- Dual-band /
- Hybrid-structural shaping /
- Low Voltage Standing Wave Ratio(VSWR)

HTML全文

图 1 混合结构椭圆波束天线的示意图

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图 2 $\varphi = 0^\circ $面主副反射面赋形曲线示意图

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图 3 选取的口面场能量分布曲线

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图 4 长短轴平面上主副反射面曲线和馈源剖面图

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图 5 主副反射面的俯视图

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图 6 主副反射面Grasp仿真模型和光路图

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图 7 Grasp仿真的天线辐射方向图

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图 8 CST全波仿真模型

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图 9 全波仿真天线辐射方向图

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图 10 驻波曲线

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图 11 31 GHz的最坏解集

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图 12 考虑公差后天线方向图与原模型比较

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图 13 考虑公差后驻波曲线与原模型比较

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表 1 Grasp仿真的天线辐射性能

频率(GHz)	11.45	12.75	14.00	14.50	17.70	21.20	29.40	31.00
增益(dBi)	38.50	39.40	40.20	40.51	42.40	44.01	46.72	47.17
俯仰面旁瓣(dB)	–15.27	–14.95	–14.86	–14.84	–15.54	–15.41	–15.08	–15.03
45°面旁瓣(dB)	–21.28	–21.13	–21.12	–21.06	–20.42	–19.59	–20.10	–19.65
方位面旁瓣(dB)	–18.60	–19.08	–19.33	–19.45	–19.15	–18.87	–17.26	–17.00
口径效率(%)	60.75	60.36	60.10	60.16	62.39	63.11	61.16	61.00

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表 2 CST全波仿真的天线辐射性能

频率(GHz)	11.45	12.75	14.00	14.50	17.70	21.20	29.40	31.00
增益(dBi)	38.62	39.39	40.15	40.49	42.08	43.83	46.50	47.10
俯仰面旁瓣(dB)	–13.15	–12.51	–13.83	–13.36	–12.79	–14.40	–17.24	–15.92
45°面旁瓣(dB)	–16.24	–17.79	–17.13	–16.83	–18.05	–19.43	–19.15	–19.70
方位面旁瓣(dB)	–15.00	–17.45	–15.61	–15.42	–16.96	–18.97	–19.00	–18.53
口径效率(%)	62.50	60.18	59.46	59.94	58.01	60.50	58.18	60.08

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表 3 考虑公差后的天线辐射性能

频率(GHz)	11.45	12.75	14.00	14.50	17.70	21.20	29.40	31.00
增益(dBi)	38.58	39.29	39.97	40.46	42.05	43.81	46.37	46.87
俯仰面旁瓣(dB)	–12.92	–12.36	–13.71	–13.23	–12.21	–15.20	–16.61	–15.42
45°面旁瓣(dB)	–16.55	–16.71	–17.00	–16.06	–17.15	–18.53	–19.12	–18.80
方位面旁瓣(dB)	–15.13	–16.03	–15.61	–14.67	–16.67	–16.91	–15.88	–17.01
口径效率(%)	61.92	58.81	57.04	59.53	57.61	60.23	56.46	56.98

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