Electro-Optic Characterization of Microwave Standing Waves in a GaAs Transmission Line by Using a Novel Phase Analyzing Technique

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Abstract
We demonstrate an accurate, non-contact and compact characterization technique for measuring both the amplitude and phase component of microwave standing-wave patterns in a GaAs microstrip transmission line. A laser-diode-based optoelectronic phase lock loop was employed as a phase-referencing scheme. Key parameters such as voltage standing-wave ratio and reflection coefficient for a GaAs microstrip transmission line were determined up to 16 GHz. Dispersion charateristics were found in good agreement with selected theoretical models.

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