Title :
An 8-18-GHz all-optical microwave downconverter with channelization
Author :
Strutz, Shane J. ; Williams, Keith J.
Author_Institution :
Naval Res. Lab., Washington, DC, USA
fDate :
10/1/2001 12:00:00 AM
Abstract :
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
Keywords :
heterodyne detection; microwave frequency convertors; microwave photonics; phase modulation; 2 to 2.5 GHz; 500 MHz; 8 to 18 GHz; all-optical microwave downconverter; heterodyne detection; image rejection; intermediate frequency band; local oscillator; phase modulator; signal channelization; spur-free dynamic range; two-channel system; wideband fiber-optic device; Dynamic range; Frequency measurement; Image converters; Local oscillators; Optical mixing; Optical modulation; Performance evaluation; Phase detection; Phase modulation; Wideband;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
