An 8-18-GHz all-optical microwave downconverter with channelization
An 8-18-GHz all-optical microwave downconverter with channelization
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DOI：
10.1109/22.954819
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发表时间：
2001-10-01
影响因子：
4.3
通讯作者：
Williams, KJ
中科院分区：
文献类型：
--
作者：
Strutz, SJ;Williams, KJ
介绍了一种宽带光纤镜像抑制下变频器，它能够将接收信号导通到500 MHz的中频带。在利用系统本地振荡器进行外差检测之前，下变频器利用相位调制器将接收的信号转换成光边带。在一个将8-18 GHz信号映射到2-2.5 GHz中频的双通道系统上进行的实验测量表明，镜像抑制为20分贝，无杂散动态范围为107分贝/赫兹(2/3)。
A wide-band fiber-optic image-rejection downconverter capable of channelizing received signals into a 500-MHz intermediate frequency band is demonstrated. The downconverter utilizes phase modulators to convert received signals into optical side-bands prior to heterodyne detection with the system local oscillator. Experimental measurements performed on a two-channel system which maps 8-18-GHz signals into intermediate frequencies between 2 and 2.5 GHz reveal an image rejection of 20 dB and a spur-free dynamic range of 107 dB/Hz(2/3).