Title :
A Calibrated Microwave Directional Bridge for Remote Network Analysis through Optical Fiber
Author :
Marshall, Todd S. ; Van Tuyl, R.
Author_Institution :
Agilent Technol., Inc., Palo Alto, CA
Abstract :
A method of measuring the reflection coefficient of a RF device under test at a remote location is presented. By measuring the voltage magnitude and phase at two separated points along a transmission line, the ratio of reverse and forward waves on the transmission line is calculated. High-impedance, 25 GHz bandwidth reflection mode electro-absorption modulators (REAM) are used to probe the voltages without perturbing the signal along the transmission line. Since the RF voltage signals are converted by each REAM to optical signals on fiber, freedom to locate the DUT far away from the test set is achieved
Keywords :
electroabsorption; microstrip directional couplers; optical fibres; optical modulation; 25 GHz; RF device; directional couplers; microwave directional bridge; optical fiber; phase measurement; reflection coefficient; reflection mode electro-absorption modulators; remote network analysis; scattering parameters measurement; transmission line; voltage magnitude measurement; Bridge circuits; Microwave devices; Optical fiber testing; Optical fibers; Optical reflection; Phase measurement; RF signals; Radio frequency; Transmission line measurements; Voltage measurement; Electroabsorption; couplers; directional couplers; scattering parameters measurement; transducer;
Conference_Titel :
Microwave Symposium Digest, 2006. IEEE MTT-S International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9541-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2006.249820
