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首页> 外文会议>Automatic Radio Frequency Techniques Group Microwave Measurement Conference >Multi-Harmonic Broadband Measurements using an Large Signal Network Analyzer
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Multi-Harmonic Broadband Measurements using an Large Signal Network Analyzer

机译：使用大信号网络分析仪的多谐波宽带测量

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A new test-bed was developed with an LSNA to perform multi-harmonic broadband measurements for periodically modulated signals with bandwidth exceeding the IF receiver bandwidth of the LSNA. This testbed is intended for characterizing PAs using periodically modulated (multitone) signals often referred as multisines. Multisine signals can be synthesized to approximate the CCDF and PAPR of digitally modulated signals such as WiMAX and LTE (Long Term Evolution). In the experiment conducted a multisine with 13 tones distributed over 15 MHz was used which provided a PAPR of 6 dB. Using this excitation, the nonlinear response of a 80 W Doherty GaN PA at 2.16 GHz was characterized over a 80 MHz bandwidth. In band signal distortion and spectral regrowth were recorded in the 63 tones measurement over the 80 MHz measurement bandwidth targeted at both the fundamental and second harmonic. This increased measurement bandwidth enables one to characterize the nonlinear vector response of the PA in its 3rd and 5th order inter-modulation bands at the fundamental frequency. The broadband vector results at the second harmonic obtained in the same measurements provides additional invaluable information for the multi-harmonic optimization of the efficiency of the Doherty PA under test. It is believed that the multi-harmonic broadband vector characterization capabilities provided by the reported testbed should assist with the development and verification of multi-harmonic behavioral models for wideband modulated signals.
机译：使用LSNA开发了一个新的测试床，以便对带宽超过LSNA的接收器带宽来执行多谐波宽带测量。该测试平台用于使用通常称为MultiSines的定期调制（多通元）信号来表征PAS。可以合成多语言信号以近似数字调制信号的CCDF和PAPR，例如WiMAX和LTE（长期演进）。在实验中，使用分布超过15MHz的13个色调进行多分，提供了6 dB的PAPR。使用这种激励，在2.16 GHz的80 W Doherty GaN PA的非线性响应在80 MHz带宽上的特征。在频带信号失真和光谱再次记录在63音调中，在针对基本和二次谐波的80 MHz测量带宽上测量。该增加的测量带宽使得能够在基频处的第3和第5阶的第三顺序的第3阶和第5阶的间频带中的非线性矢量响应。在相同测量中获得的第二次谐波的宽带矢量结果提供了多谐波优化在被测Doherty PA的效率的多谐波优化的额外宝贵信息。据信，报告的测试台提供的多谐波宽带矢量表征能力应协助开发和验证宽带调制信号的多谐波行为模型。

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