无线电工程Issue(3)：62-66,5.DOI:10.3969/j.issn.1003-3106.2015.03.17
一种高线性度混频器设计
Design of a Highly Linear Mixer
摘要
Abstract
Highly linear mixer is the key component of high dynamic receiving system. Improvement of linearity is in favour of extending the dynamic range of the system. A method of improving the linearity of mixers by increasing the amount of diodes is inferred theoretically by means of the nonlinear analysis of diode mixers.Based on the result of theoretical analysis,ahighly linear double balanced mixeris designed using a GaAs pHEMT process,operating in the frequency range from 0.03~3 GHz.The corresponding local oscillator frequency is 3.95~6. 92 GHz. The mixer can achieve an input third order intercept point greater than 25 dBm at a fixed intermediate frequency of 3.92 GHz,while LO to IF and LO to RF isolation are both larger than 37 dB.The chip size is 1.5 mm×1.1 mm.关键词
混频器/高线性/输入三阶截点/隔离度Key words
mixer/highly linear/input third order intercept point/isolation分类
信息技术与安全科学引用本文复制引用
吴楠,纪学军..一种高线性度混频器设计[J].无线电工程,2015,(3):62-66,5.基金项目
国家部委基金资助项目。 （）
