Phase characterization of two-tone intermodulation distortion

被引:9
|
作者
Crespo-Cadenas, C [1 ]
Reina-Tosina, J [1 ]
Madero-Ayora, MJ [1 ]
机构
[1] Univ Seville, Escuela Super Ingn, Seville 41092, Spain
关键词
two-tone test setup; electrical memory effects; IM products; phase asymmetries; Volterra series; amplifier distortion;
D O I
10.1109/MWSYM.2005.1516979
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
An automated setup for the characterization or phase asymmetries in nonlinear microwave circuits under two-tone excitation is presented. The method includes a novel approach to generate two synchronized tones with the same amplitude and phase using an arbitrary-waveform signal generator. Special attention is devoted to the evaluation of two-tone MID impairments as a consequence of memory effects and assess its dependence on their separation in frequency. Experimental results over a HEMT amplifier exhibiting phase asymmetries are compared with standard two-tone measurements and show that the accuracy of this procedure is good, with negligible non-systematic errors.
引用
收藏
页码:1505 / 1508
页数:4
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