The Analysis, Based On The Fdtd Waveguide Electric Field Sensor Electrode

With the rapid development of electronic technology, evaluation of the electromagnetic compatibility (EMC) of the equipment and measure of the electromagnetic field have become increasingly important. Therefore, various electric field sensors have been developed. Among them, because of the electric field sensor based on electro-optic effect small size, wide bandwidth, high sensitivity and anti-electromagnetic interference, become a hot field of electric field sensors. In this dissertation, the characteristics of electric field sensor based on integrated optics are studied, and finite difference time domain(FDTD) method using Matlab language programming for simulation of electrode on optical waveguide electric field sensor.In the integrated optical waveguide electric field sensor's antenna because the ratio of the length and the wide is above 1000, this is disadvantageous to the business electromagnetism simulation software.In this paper, FDTD method is used to modeling waveguide electric field sensors.First, this dissertation has introduced the operation principle of the optical waveguide electric field sensor, and built a system model. The principle of FDTD and key statements of Matlab were discussed. Finally, dipole antenna and tapered antenna are modeling and simulation, by contrast with experiment, we found that this approach can be effective simulation of the optical waveguide electric field sensor. a theoretical basis for analysis and design of optical waveguide electric field sensor is provided.