Design of High-Directivity Wideband Microstrip Directional Coupler With Fragment-Type Structure
Design of High-Directivity Wideband Microstrip Directional Coupler With Fragment-Type Structure
复制标题
片状结构高方向性宽带微带定向耦合器设计
DOI：
10.1109/tmtt.2015.2490671
复制
发表时间：
2015-10
影响因子：
4.3
通讯作者：
Siden, Johan
中科院分区：
文献类型：
--
作者：
Wang, Lu;Wang, Gang;Siden, Johan
提出了一种采用分段结构的微带宽带定向耦合器的设计方案。使用片段型结构可以提供令人满意的灵活性和优异的性能。对于给定的设计空间，首先将空间网格化为碎片单元，然后对由多目标优化搜索算法选择的碎片单元进行金属化，如基于分解的多目标进化算法和增强型遗传算子。作为演示，设计了一个20分贝的宽带微带定向耦合器，并进行了测试验证。测量了以2 GHz为中心的45%带宽，在20dB耦合电平下的最大变化为0.5db。在工作频段内，所设计的耦合器的方向性大于37d B，在2 GHz处的最大方向性为48d B。此外，还进一步讨论了多目标优化搜索的一些技术问题，如设计空间的影响、耦合程度的控制、优化搜索的效率考虑等。片段式结构也可用于设计高性能的紧耦合宽带定向耦合器。
A novel design for a microstrip wideband directional coupler is proposed by using fragment-type structures. The use of a fragment-type structure may provide satisfactory flexibility and excellent performance. For a given design space, a fragment-type wideband coupler can be designed by first gridding the space into fragment cells and then metallizing the fragment cells selected by a multi-objective optimization searching algorithm, such as a multi-objective evolutionary algorithm based on decomposition combined with enhanced genetic operators. For demonstration, a 20-dB wideband microstrip directional coupler is designed and verified by test. A 45% bandwidth centered at 2 GHz has been measured in terms of maximum variation of 0.5 dB in the 20-dB coupling level. In the operation band, the designed coupler has directivity above 37 dB, and a maximum directivity of 48 dB at 2 GHz. In addition, some technique aspects related to multi-objective optimization searching, such as effects of design space, control of coupling level, and efficiency consideration for optimization searching, are further discussed. Fragment-type structures may also be used to design high-performance wideband directional couplers of tight coupling level.
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影响因子：
1.1
作者：
Jiangxiao Han;G. Wang;J. Sidén
通讯作者：
Jiangxiao Han;G. Wang;J. Sidén
影响因子：
1.7
作者：
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通讯作者：
D. Ding;G. Wang;Lu Wang
DOI：
10.1109/tmtt.2012.2216283
发表时间：
2012-09
影响因子：
4.3
作者：
A. Pourzadi;A. Attari;M. S. Majedi
通讯作者：
A. Pourzadi;A. Attari;M. S. Majedi
影响因子：
1
作者：
D. Ding;G. Wang
通讯作者：
D. Ding;G. Wang
DOI：
10.1109/tmtt.2006.881026
发表时间：
2006-08
影响因子：
4.3
作者：
Ravee Phromloungsri;M. Chongcheawchamnan;I. Robertson
通讯作者：
Ravee Phromloungsri;M. Chongcheawchamnan;I. Robertson