排序方式: 共有92条查询结果,搜索用时 15 毫秒
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介绍了一种全集成微带四次谐波混频器,该混频器采用了一种新型电磁带隙结构,可获得很低的变频损耗指标.阐述了一般的谐波混频理论,并用谐波平衡软件对整个电路进行优化仿真.实测得到射频在34~36GHz的频带内,固定中频为100MHz,该混频器最小变频损耗7.67dB,最大变频损耗<10dB. 相似文献
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通过把3 种不同尺寸的L-bridge 单元进行组合,在多层PCB 板的电源层上,设计了一种新的多周期平面型超宽带电磁带隙(Electromagnetic Band Gap, EBG)结构,可用于抑制数字电路系统中的同步开关噪声(Simultaneous Switching Noise, SSN)。利用HFSS 软件对该EBG 结构进行了建模和仿真,并在仿真基础上制作了电路实物,实测与仿真结果吻合良好。组合结构EBG 比传统L-bridge EBG 的阻带宽度有明显提高,当抑制深度为-40 dB 时,具有从0.8 GHz 到9.5 GHz 的超宽带阻带特性。 相似文献
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In this study, a generalized and easy to use method based on Hill's equation and chain matrix concept is used to analyze the electromagnetic wave propagation in stratified dielectric and inhomogeneous media with arbitrary profiles.Numerical simulations are performed to compute the reflection and transmission of several Electromagnetic Bandgap (EBG) structures for various permittivity profiles and given polarization as well as incidence angles of driving fields.Multilayer structures are analyzed and optimized to enhance their selectivity performances. Obtained results agree excellently well with other published data. 相似文献
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Huiliang Xu Zeyu Zhao Yueguang Lv Chunlei Du Xiangang Luo 《International Journal of Infrared and Millimeter Waves》2008,29(5):493-498
A high directive planar antenna made from a metamaterial superstrate and an electromagnetic band-gap (EBG) substrate has been
investigated. A patch antenna surrounded with EBG structures is used as the radiation source. The CST Microwave Studio is
used for the simulation. The results show that the gain of the antenna with metamaterial is 21.6 dB at the operating frequency
of 14.6 GHz. Compared with the patch feed with the same aperture size but without the metamaterial superstrate, the performance
of the antenna is improved obviously and the gain increases about 12.4 dB. 相似文献
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采用标准0.18μmCMOS工艺设计制造了一种带EBG(电磁带隙)结构的小型化片上天线。该片上天线由一根长1.6mm的偶极子天线以及一对一维的尺寸240μm×340μmEBG结构构成。分别对该EBG结构以及片上天线的S11及S21进行了仿真和测试,结果表明该片上天线工作在20GHz,具有小型化的性能,同时具备三次谐波抑制的功能。 相似文献