电讯技术2016，Vol.56Issue(6)：702-707,6.DOI:10.3969/j.issn.1001-893x.2016.06.019
一种8 mm频段封闭腔全息准光功率合成网络的设计
Design of a Closed Holographic Quasi-optical Power Combiner at 8 mm Band
摘要
Abstract
Based on Talbot Effect of periodical phase grating,a new design of quasi-optical( QO) 18 to 1 closed holographic power combiner with high efficiency at millimeter wave band is presented in this paper. A novel periodic phase profile in which the phase difference of adjacent half period is π is adopted. Moreo-ver,in the linear zero region perpendicular to the grating,an enclosed metallic wall is designed to screen the power combiner. By this way,radiation loss is decreased and electromagnetic compatibility is improved dramatically. The phase grating is optimized by Generic Algorithm based on fitness function related with the deviation between target field pattern and simulated field using scalar diffraction theory. The construction of the phase grating is realized with lens of a variable-width waveguides array. The efficiency of combiner is demonstrated to be 81% at 37 . 5 GHz which is well agreed with the simulated result of 89%. Since QO power combiner can be extended from one-dimension to two-dimension and its efficiency is essentially in-dependent of the number of combining elements and the inter-element spacing,this technology can be ap-plied in power combining of large number of devices at millimeter-wave band and the THz band.关键词
毫米波/全息准光功率合成/塔尔博特效应/相位栅格/基因算法Key words
millimeter wave/holographic quasi-optical power combining/Talbot effect/phase grating/ge-neric algorithm分类
信息技术与安全科学引用本文复制引用
李光..一种8 mm频段封闭腔全息准光功率合成网络的设计[J].电讯技术,2016,56(6):702-707,6.基金项目
中国西南电子技术研究所发展基金项目@@@@The Foundation Project of Southwest China Institute of Electronic Technology （）
