Ku波段微波单片集成电路6位数字衰减器设计

周守利; 张景乐; 吴建敏; 周赡成; 程元飞

doi:10.11884/HPLPB201931.190049

Ku波段微波单片集成电路6位数字衰减器设计

doi: 10.11884/HPLPB201931.190049

1.
浙江工业大学信息工程学院，杭州 310023
2.
上饶师范学院，江西上饶 334001

基金项目: 江西省教育厅科技计划项目（GJJ180875）；中国博士后科学基金项目（2013M540147）

详细信息

作者简介:
周守利(1972－)，男，副教授，主要从事复杂航空系统电子信息技术研究；zhoushl@zjut.edu.cn

通讯作者:
程元飞(1976－)，男，讲师，主要从事物理电子学和集成电路技术研究；405744092@qq.com

中图分类号: TN432
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出版历程
- 收稿日期: 2019-02-22
- 修回日期: 2019-10-08
- 刊出日期: 2019-12-01

Design of Ku-band 6 bit digital attenuator of microwave monolithic integrated circuit

1.
College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
2.
Shangrao Normal University, Shangrao 334001, China

摘要

摘要: 基于GaAs 0.25 μm增强/耗尽型（E/D）赝配高电子迁移率晶体管（pHEMT）工艺，研制了一款Ku波段6位数字衰减器微波单片集成电路（MMIC）。该6位数字衰减器由6个基本衰减位级联组成，可实现最大衰减量为31.5 dB、步进为0.5 dB的衰减量控制。采用简化的T型衰减结构，实现了0.5 dB和1 dB的衰减位。16 dB衰减位采用开关型衰减拓扑，在提高衰减平坦度的同时，有效降低其附加相移。测试结果表明，在12～18 GHz的频率内，数字衰减器衰减64态均方根误差（RMS）小于0.25 dB，附加相移为−0.5°～＋9.5°，插入损耗小于4.9 dB，输入输出驻波比均小于1.5∶1。芯片尺寸为3.00 mm×0.75 mm。该芯片电路具有宽频带、高衰减精度、小尺寸的特点，主要用于微波相控阵收发组件、无线通讯等领域。
- Ku波段 /
- 砷化镓 /
- 数字衰减器 /
- 高衰减精度 /
- 微波单片集成电路
Abstract: A Ku-band 6 bit digital attenuator of microwave monolithic integrated circuit (MMIC) was developed based on GaAs E/D pseudomorphic high electron mobility transistor (pHEMT) process. The 6 bit digital attenuator was made up of six base states. It could obtain maximum attenuation of 31.5 dB with the attenuation step of 0.5 dB. 0.5 dB and 1 dB attenuation bits were realized by adopting simplified T-type structure. In the 16 dB attenuation bit, a switched-path-type topology was employed to improve the attenuation flatness and reduce the additional phase shift effectively. The measurement results show that in the range of 12−18 GHz, the 64-state root mean square (RMS) error is less than 0.25 dB, the phase variation is from −0.5° to ＋9.5°, the insertion loss is less than 4.9 dB and the input and output voltage standing wave ratios are both less than 1.5∶1. The chip size is 3.00 mm×0.75 mm. The MMIC chip has the characteristics of wide bandwidth, high attenuation accuracy and small size. It can be mainly used in fields such as microwave phased array radar transceiver components and communication.
- Ku-band /
- GaAs /
- digital attenuator /
- high attenuation accuracy /
- microwave monolithic integrated circuit

HTML全文

图 1 开关电路及等效电路模型示意图

Figure 1. Schematic and equivalent model of switching circuit

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图 2 数字衰减器的电路拓扑

Figure 2. Circuit topology of digital attenuator

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图 3 电阻衰减网络拓扑

Figure 3. Resistance attenuation network topology

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图 4 数字衰减器芯片照片

Figure 4. The photograph of digital attenuator chip

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图 5 衰减64态输入驻波比测试结果

Figure 5. Measured input VSWR of all 64 states

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图 6 衰减64态输出驻波比测试结果

Figure 6. Measured output VSWR of all 64 states

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图 7 基态插入损耗测试结果

Figure 7. Measured insertion loss of reference state

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图 8 衰减64态相对衰减量测试结果

Figure 8. Measured relative attenuation of all 64 states

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图 9 衰减64态均方根误差测试结果

Figure 9. Measured RMS error of attenuation of all 64 states

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图 10 衰减64态附加相移测试结果

Figure 10. Measured phase variation of all 64 states

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参考文献(15)

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