一种X波段磁场耦合式波导-微带转换结构
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摘要
波导-微带转换器是微波集成电路和天馈线系统中的重要器件。结合具体应用,设计了一款新型、宽带磁耦合式波导-微带转换器。和传统结构相比,本设计用双层的贴片结构代替金属块状阶梯脊,通过在贴片上加载金属过孔来展宽转换的带宽;将阶梯状金属贴片和微带探针一体化设计,从而避免了焊接带来的损耗和结构不稳定,并且减小了加工难度,降低了重量和成本。测试结果表明,波导-微带转换器的两个端口在8.85～11.52 GHz的频带内回波损耗小于-15 dB,插入损耗约为0.8 dB,均满足应用需求。
Waveguide to microstrip transition is one of the most important components in monolithic microwave integrated circuit and antenna-feeder system. In this paper, a novel magnetic coupling waveguide to microstrip transition is presented according to the specific application. Compared with traditional structure, the stepped metal-ridge in waveguide is replaced with two-layer patches, and seven rows of metallic vias are loaded in the patches to broaden the bandwidth. Because of the integration design of step-like patches and microstrip probe, the welding loss and structural instability are avoided. Furthermore, the design reduces the weight, cost and the processing difficulty. The measured results show that the proposed waveguide to microstrip transition achieves a-15 dB return loss from 8.85 GHz to 11.52 GHz, and its insertion loss is about 0.8 dB within that band. They both meet the project requirements.
Waveguide to microstrip transition is one of the most important components in monolithic microwave integrated circuit and antenna-feeder system. In this paper, a novel magnetic coupling waveguide to microstrip transition is presented according to the specific application. Compared with traditional structure, the stepped metal-ridge in waveguide is replaced with two-layer patches, and seven rows of metallic vias are loaded in the patches to broaden the bandwidth. Because of the integration design of step-like patches and microstrip probe, the welding loss and structural instability are avoided. Furthermore, the design reduces the weight, cost and the processing difficulty. The measured results show that the proposed waveguide to microstrip transition achieves a-15 dB return loss from 8.85 GHz to 11.52 GHz, and its insertion loss is about 0.8 dB within that band. They both meet the project requirements.
引文
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[10] 王晓薇,徐自强,谭力,等.一小型化T 隔板多层基片集成波导滤波器设计[J].微波学报,2018 34(2):35-38 Wang X W,Xu X Q,Tan L,et al.Compact multiplayer filter with T-septum substrate integrated waveguide [J].Journal of Microwaves,2018 34(2):35-38
[11] Takuro T,Song H J,Makoto Y,Design and analysis of LTCC-integrated planar microstrip-to-waveguide transition at 300 GHz [J].IEEE Trans on Microwave Theory and Techniques,2016,64(1):106-114
[12] Pozar D M.Microwave engineering [M].Hoboken:John Wiley & Sons,Inc.,2011.110-120
[13] Xu Y S,Bosisio R G.Design of wideband six- and eight-way Wilkinson planar power dividers using stepped impedance transformers[J].Microwave and Optical Technology Letters,2016,58(1):189-192
[2] Liu S F,Shi X W.A novel wideband waveguide-to-microstrip transition with waveguide stepped impedance transformer [A].International Conference on Microwave and Millimeter Wave Technology[C],Shenzhen,2012.1-4
[3] 林勇,乔明昌,王宗成,等.108 GHz 功率放大器模块研制[J].微波学报,2017,33(6):48-51 Lin Y,Qiao M C,Wang Z C,et al.108 GHz power amplifier module [J].Journal of Microwaves,2017,33(6):48-51
[4] Xu W Y,Liu F K,Xu H D.A novel ultra-wideband waveguide-to-microstrip transition for millimeter-wave applications [J].AIP Advances,2016,6(10):604-605
[5] Oleg S,Alexey A,Vladimir S,et al.Wideband probe-type waveguide-to-microstrip transition for V-band applications [A].The 46th European Microw Conference (EuMC)[C],London,2016.1-4
[6] Kevin H K,Johan J,Johann W O.Coaxial end-launched and microstrip to partial-plane waveguide transitions [J].IEEE Transactions on Microwave Theory and Techniques,2015,63(10):3103-3108
[7] 许志涛,徐军,王茂琰,等.Ka频段矩形波导-微带转换结构[J].电子科技大学学报,2013,42(5):684-987 Xu Z T,Xu J,Wang M Y,et al.Novel Ka-band waveguide-microstrip transition structure [J].Journal of University of Electronic Science and Technology of China,2013,42(5):684-687
[8] Kwon H J,Waveguide to microstrip probe transition for Ka-band transceiver applications [A].Asia-Pacific Microwave Conference[C],Macau,2008.1-4
[9] Achraf B A,Maurizio B,Luca P,et al.Comparison of fabrication tolerance sensitivity between substrate integrated waveguide and microstrip circuits[A].IEEE MTT-S International Microwave Symposium (IMS)[C],Phoenix,2015
[10] 王晓薇,徐自强,谭力,等.一小型化T 隔板多层基片集成波导滤波器设计[J].微波学报,2018 34(2):35-38 Wang X W,Xu X Q,Tan L,et al.Compact multiplayer filter with T-septum substrate integrated waveguide [J].Journal of Microwaves,2018 34(2):35-38
[11] Takuro T,Song H J,Makoto Y,Design and analysis of LTCC-integrated planar microstrip-to-waveguide transition at 300 GHz [J].IEEE Trans on Microwave Theory and Techniques,2016,64(1):106-114
[12] Pozar D M.Microwave engineering [M].Hoboken:John Wiley & Sons,Inc.,2011.110-120
[13] Xu Y S,Bosisio R G.Design of wideband six- and eight-way Wilkinson planar power dividers using stepped impedance transformers[J].Microwave and Optical Technology Letters,2016,58(1):189-192