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An 8-18-GHz all-optical microwave downconverter with channelization

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2 Author(s)
Strutz, S.J. ; Naval Res. Lab., Washington, DC, USA ; Williams, K.J.

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/Hz2/3

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:49 ,  Issue: 10 )