该文使用两种全波分析法对传统的带阻滤波器和一维复合左右手传输线(Composite Right/left-handed Transmission Line CRLH-TL)进行了数值分析,解决了多端口激励源的设置和多端口S参数提取的两大难点,计算结果分别与FEKO和电路模型等效...该文使用两种全波分析法对传统的带阻滤波器和一维复合左右手传输线(Composite Right/left-handed Transmission Line CRLH-TL)进行了数值分析,解决了多端口激励源的设置和多端口S参数提取的两大难点,计算结果分别与FEKO和电路模型等效法的分析结论进行了比较,吻合较好;并通过增加CRLH单元数得出电路模型等效法的不足,不仅验证了此激励源设置和S参数提取的正确性,也得出了CRLH-TL不同于传统右手传输线的一些左手特性,为分析、优化CRLH传输线以及CRLH漏波天线提供了一定的理论支持。展开更多
基于复合左/右手传输线(compositeright/left-handed transmission line,CRLH)理论,设计了供船舶救险报警系统用的、可工作于1.6GHz和2.4GHz的双频小型化EPIRB(emergency position indicating radio beacon,EPIRB)天线,对所设计天线进...基于复合左/右手传输线(compositeright/left-handed transmission line,CRLH)理论,设计了供船舶救险报警系统用的、可工作于1.6GHz和2.4GHz的双频小型化EPIRB(emergency position indicating radio beacon,EPIRB)天线,对所设计天线进行了数学仿真.仿真结果证明,天线符合相关国家和国际标准,并且该天线相对于现有的鞭状EPIRB天线具有结构尺寸小、低剖面、易于制备和易集成等优点.天线能工作于2.4GHz频段,可用于近距离通信,扩展了天线的使用范围,为新型EPIRB天线设计提供了新思路.展开更多
介绍了一种新型混合左右手(composite right/left-handed,CRLH)结构,该传输线结构具有负的磁导率和负的介电常数。与常规的CRLH结构相比,该结构以更小的插损、更大的带宽、更小的尺寸实现了左手特性。本文应用该CRLH结构设计了一个零阶...介绍了一种新型混合左右手(composite right/left-handed,CRLH)结构,该传输线结构具有负的磁导率和负的介电常数。与常规的CRLH结构相比,该结构以更小的插损、更大的带宽、更小的尺寸实现了左手特性。本文应用该CRLH结构设计了一个零阶谐振带通滤波器,它由三个CRLH零阶谐振单元组成,具有谐振频率与电路尺寸无关的特性,其计算仿真和实验测量结果吻合很好。实验测量结果显示:CRLH带通滤波器通带位于2.5 GHz,具有0.8 d B的插入损耗和25%(500 MHz)的3 d B带宽。这种CRLH传输线滤波器在无线电通信、导航等多频带微波系统中具有良好的实用价值。展开更多
A new power divider, composed of a novel composite right/left-handed (CRLH) transmission line (TL) unit, is proposed. The properties of the power divider based on four CRLH TL unit cells are investigated theoretically...A new power divider, composed of a novel composite right/left-handed (CRLH) transmission line (TL) unit, is proposed. The properties of the power divider based on four CRLH TL unit cells are investigated theoretically. By adjusting the parameters of the capacitors and the inductors, the power divider shows perfectly symmetric power division at 5.13 GHz, return loss up to ?24 dB, with the transmitted power being close to ?3.1 dB. The phenomena are demonstrated by simulation results. Being compact in size and low-cost, the proposed power divider is very suitable for microwave and millimeter wave integrated circuits.展开更多
文摘该文使用两种全波分析法对传统的带阻滤波器和一维复合左右手传输线(Composite Right/left-handed Transmission Line CRLH-TL)进行了数值分析,解决了多端口激励源的设置和多端口S参数提取的两大难点,计算结果分别与FEKO和电路模型等效法的分析结论进行了比较,吻合较好;并通过增加CRLH单元数得出电路模型等效法的不足,不仅验证了此激励源设置和S参数提取的正确性,也得出了CRLH-TL不同于传统右手传输线的一些左手特性,为分析、优化CRLH传输线以及CRLH漏波天线提供了一定的理论支持。
文摘基于复合左/右手传输线(compositeright/left-handed transmission line,CRLH)理论,设计了供船舶救险报警系统用的、可工作于1.6GHz和2.4GHz的双频小型化EPIRB(emergency position indicating radio beacon,EPIRB)天线,对所设计天线进行了数学仿真.仿真结果证明,天线符合相关国家和国际标准,并且该天线相对于现有的鞭状EPIRB天线具有结构尺寸小、低剖面、易于制备和易集成等优点.天线能工作于2.4GHz频段,可用于近距离通信,扩展了天线的使用范围,为新型EPIRB天线设计提供了新思路.
文摘介绍了一种新型混合左右手(composite right/left-handed,CRLH)结构,该传输线结构具有负的磁导率和负的介电常数。与常规的CRLH结构相比,该结构以更小的插损、更大的带宽、更小的尺寸实现了左手特性。本文应用该CRLH结构设计了一个零阶谐振带通滤波器,它由三个CRLH零阶谐振单元组成,具有谐振频率与电路尺寸无关的特性,其计算仿真和实验测量结果吻合很好。实验测量结果显示:CRLH带通滤波器通带位于2.5 GHz,具有0.8 d B的插入损耗和25%(500 MHz)的3 d B带宽。这种CRLH传输线滤波器在无线电通信、导航等多频带微波系统中具有良好的实用价值。
基金Project supported by the National Natural Science Foundation of China (Nos. 60577023 and 60378037), the National Basic Research Program (973) of China (No. 2004CB719802), China Postdoctoral Science Foundation, and Education Ministry Key Laboratory of Photoelectric Information Technology Science Foundation (No. 2005-20), China
文摘A new power divider, composed of a novel composite right/left-handed (CRLH) transmission line (TL) unit, is proposed. The properties of the power divider based on four CRLH TL unit cells are investigated theoretically. By adjusting the parameters of the capacitors and the inductors, the power divider shows perfectly symmetric power division at 5.13 GHz, return loss up to ?24 dB, with the transmitted power being close to ?3.1 dB. The phenomena are demonstrated by simulation results. Being compact in size and low-cost, the proposed power divider is very suitable for microwave and millimeter wave integrated circuits.
