一种电控复合左右手圆极化漏波天线  

An Electrically Controlled CRLH-Inspired Circularly Polarized Leaky-Wave Antenna

作　　者：张群豪 陈晚[2] 吕博 邵晓琪 傅佳辉[1] 

机构地区：[1]哈尔滨工业大学微波工程系,黑龙江哈尔滨 [2]哈尔滨工业大学空间环境与物质科学研究院,黑龙江哈尔滨 [3]哈尔滨工程大学物理与光电工程学院,黑龙江哈尔滨

出　　处：《天线学报》2019年第2期9-17,共9页Journal of Antennas

摘　　要：本文设计了一种电控圆极化漏波天线,通过在复合左右手传输线结构加载变容二极管,实现波束扫描。天线单元结构由两部分组成:三个定频电扫二极管以及一个实现圆极化辐射的方形贴片。引入了单电压偏置的直流馈线结构,通过均匀偏置电压控制,实现圆极化波束扫描。该天线工作在2.4 GHz,并且实现了从+40?到?17?的连续波束扫描。在不同的扫描角度下,轴比保持在3 dB以下。An electrically controlled beam-scanning circularly polarized leaky-wave antenna is presented by cascading multiple unit cells of a composite right/left-handed transmission line(CRLH-TL)structure.The antenna unit cell consists of two parts:three varactor diodes,which enable beam electrically steerable at a fixed frequency and a square-shaped patch that is perturbed to stimulate circular polarization radiation.Moreover,a DC feeder of single-voltage bias,which allows all the unit cells to be simply controlled by a single uniform bias voltage,is introduced to steer the beam direction.The proposed antenna operates at 2.4 GHz and beam scans from+40?to?17?continuously.The axial ratio remains below 3 dB at different angles.

关 键 词：圆极化 复合左右手传输线 电控 漏波天线 单电压偏置 

分 类 号：TN8[电子电信—信息与通信工程]