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首页> 外文会议>75th ARFTG Microwave Measurements 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：使用大型信号网络分析仪进行多谐波宽带测量

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A new testbed 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. Inband 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：用LSNA开发了一个新的测试台，可以对带宽超过LSNA IF接收器带宽的周期性调制信号执行多谐波宽带测量。该测试台旨在使用周期性调制（多音）信号（通常称为多正弦波）表征PA。可以合成多正弦信号来近似数字调制信号（例如WiMAX和LTE（长期演进））的CCDF和PAPR。在实验中，使用了在15 MHz上分布有13个音调的多正弦波，其PAPR为6 dB。使用该激励，可以在80 MHz带宽上表征80 W Doherty GaN PA在2.16 GHz时的非线性响应。在针对基波和二次谐波的80 MHz测量带宽上的63个音调测量中，记录了带内信号失真和频谱再生长。这种增加的测量带宽使人们能够表征PA在其基频的三阶和五阶互调频带中的非线性矢量响应。在相同测量中获得的二次谐波处的宽带矢量结果为被测Doherty PA效率的多谐波优化提供了额外的宝贵信息。据认为，所报道的试验台提供的多谐波宽带矢量表征能力应有助于开发和验证宽带调制信号的多谐波行为模型。

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