小型化超宽带射频变压器设计  

Design of miniaturized ultra-wideband RF transformer

作　　者：张大伟 弓永明 陈劲松[1] 陈强 李林玲 贾生文 ZHANG Da-wei;GONG Yong-ming;CHEN Jin-song;LI Lin-ling;CHEN Qiang;JIA Sheng-wen(Ninth Institute,China Electronics Technology Group Corporation,Mianyang 621000,China;Twenty-second Institute,China Electronics Technology Group,Qingdao 266107,China)

机构地区：[1]中国电子科技集团公司第九研究所,四川绵阳621000 [2]中国电子科技集团公司第二十二研究所,山东青岛266107

出　　处：《磁性材料及器件》2025年第2期51-56,共6页Journal of Magnetic Materials and Devices

摘　　要：提出了一种小型化超宽带射频变压器。采用传输线变压器理论,基于软磁铁氧体材料制成的小型化磁心,通过使用1:1不平衡:平衡阻抗变换电路,实现小体积、宽频带和高幅相平衡度的设计目标。采用高性能软磁铁氧体材料,将长度和捻度进行有效控制的传输线绕制在磁心上,有效降低了高、低频的插入损耗和电压驻波比;利用附加的平衡绕组提高幅度平衡度和相位平衡度。测试结果显示,在5~3000 MHz全频段可实现相位平衡度≤10°,幅度平衡度≤1 dB,插入损耗≤1.9 dB,电压驻波比≤1.30,尺寸≤3.18 mm×3.18 mm×3.18 mm。A miniaturized ultra-wideband radio frequency transformer is proposed.Based on the theory of transmission line transformer and miniaturized magnetic core made of soft magnetic ferrite material,the design goal of small volume,wide band and high amplitude phase balance is realized by using 1:1 unbalanced:balanced impedance conversion circuit.Using high-performance soft magnetic ferrite material,the transmission line with effective control of length and twist is wound on the magnetic core,which effectively reduces the high and low frequency insertion loss and voltage standing wave ratio.The additional balance winding is used to improve the amplitude balance and phase balance.The test results show that phase balance≤10°,amplitude≤1dB,insertion loss≤1.9dB,VSWR≤1.30,size≤3.18 mm×3.18 mm×3.18 mm can be achieved in full frequency band of 5 to 3000 MHz.

关 键 词：射频变压器 传输线变压器 软磁铁氧体 磁心 幅度平衡度 相位平衡度 

分 类 号：TM41[电气工程—电器]