摘要
研制了一款用于毫米波频段的线性化器,采用模拟预失真技术,基于90°电桥和两个肖特基二极管,在外加直流偏置的情况下,产生预失真信号,通过矢量网络分析仪测试表明,当工作频率为30GHz时,其增益扩展了3～4dB,相位延迟了20°左右。将该线性化器与毫米波功率放大器级联,双音测试结果表明,当功放的输出功率为1dB压缩点回退3dB时,三阶交调指标在工作频率30GHz和31GHz时均改善了10dB左右。该线性化器结构简单、成本较低、实用性强。
Based on analog pre-distortion, a millimeter wave linearizer is proposed in this paper. It is composed of a 3dB hybrid coupler and two Schottky diodes which generate the distorted signal while the external DC bias-voltage is applied. The amplifier is tested by a Vector Network Analyzer. The tested results show at 30GHz, the gain is expanded for 3 to 4dB, the phase is delayed about 20 degrees. Applying it to a MMW-PA, the result of the two-tone signal test shows the third-order inter-modualtion of the MMW-PA is improved by nearly 10dB when the PA works at 30 GHz and 31GHz. And it also has the characteristics of small structure and low cost, and is considerable practical.
出处
《微波学报》
CSCD
北大核心
2012年第1期70-72,共3页
Journal of Microwaves
基金
新世纪优秀人才支持计划(NCET)
