基于混合电、磁耦合结构的液体传感器设计  

Design of liquid sensor based on transmission characteristics of the filter

作　　者：李婧 李淼 苏国东 孙玲玲[1] LI Jing;LI Miao;SU Guodong;SUN Lingling(School of Electronic Information,Hangzhou Dianzi University,Hangzhou Zhejiang 310018,China)

机构地区：[1]杭州电子科技大学电子信息学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2023年第4期1-6,共6页Journal of Hangzhou Dianzi University：Natural Sciences

摘　　要：面向毫米波液体传感技术,提出一种基于混合电、磁耦合结构的液体传感器,根据传输零点的偏移实现液体的检测。在传统的平行耦合微带线中引入额外的金属过孔、容性耦合间隙及终端开路微带线,形成了混合电、磁耦合,实现了上下阻带的2个衰减零点,并将该平面结构与微流控通道结合,在混合电、磁耦合区域通入清水、甘油、乙醇、丙酮、丁醇及氯仿从而改变检测区域的介电特性,输出结果为传输零点的偏移,该6种液体的介电常数与传输零点频率具有较好的三次拟合关系。A mixed electric and magnetic coupling structure based on parallel coupled microstrip lines is presented for millimeter wave liquid sensing.In the traditional parallel coupled microstrip line,additional metal vias,capacitive coupling gaps and open stubs are introduced to form a mixed electrical and magnetic coupling,realizing two transmission zeros of both upper and lower stopbands.The planar structure is combined with the microfluidic channel;and water,glycerin,ethanol,acetone,butanol and chloroform are introduced into the mixed electrical and magnetic coupling area to change the dielectric properties of the detection area,the output result is the shift of the transmission zeros,and the dielectric constant of the six liquids has a good cubic fitting relationship with the transmission zero frequency.

关 键 词：混合电、磁耦合 传输零点 液体检测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]