Title :
Long microwave delay fiber optic link for radar testing
Author :
Newberg, I.L. ; Gee, C.M. ; Thurmond, G.D. ; Yen, H.W.
Author_Institution :
Hughes Aircraft Co., Los Angeles, CA, USA
Abstract :
A unique application of a long fiber-optic delay line as a radar repeater to improve radar testing capabilities is described. It is shown that, with the use of a 1.3- mu m wavelength distributed feedback laser and an external modulator connected to a long (31.6-km) fiber cable to provide long (152- mu s) delays with minimum dispersion at X-band (10 GHz) frequencies, performance measurements can be made on modern Doppler radars utilizing long transmitter pulses. Tests demonstrate that these fiber-optic links can meet the stringent signal/noise ratio and phase linearity and stability requirements for Doppler radar systems that use pulse compression waveforms to obtain long-range operation with high resolution.<>
Keywords :
delay lines; electronic equipment testing; microwave links; optical fibres; optical links; radar; repeaters; test equipment; 1.3 micron; 10 GHz; 152 mus; 31.6 km; DFB laser; Doppler radars; X-band; distributed feedback laser; external modulator; high resolution; long fiber-optic delay line; long transmitter pulses; long-range operation; microwave delay fiber optic link; performance measurements; phase linearity; pulse compression waveforms; radar repeater; radar test set; radar testing; signal/noise ratio; stability requirements; Delay lines; Distributed feedback devices; Doppler radar; Laser radar; Optical fiber cables; Optical fiber testing; Optical fibers; Pulse modulation; Radar applications; Repeaters;
Conference_Titel :
Microwave Symposium Digest, 1989., IEEE MTT-S International
Conference_Location :
Long Beach, CA, USA
DOI :
10.1109/MWSYM.1989.38819
