A Scanned Perturbation Technique For Imaging Electromagnetic Standing Wave Patterns of Microwave Cavities

Details A Scanned Perturbation Technique For Imaging Electromagnetic Standing Wave Patterns of Microwave Cavities A Scanned Perturbation Technique For Imaging Electromagnetic Standing Wave Patterns of Microwave Cavities

1998-06-24

arxiv.org/abs/chao-dyn/9806023v1

Nonlinear Sciences

Chaotic Dynamics

To be published in Review of Scientific Instruments,September, 1998

Scientific paper

10.1063/1.1149108

We have developed a method to measure the electric field standing wave distributions in a microwave resonator using a scanned perturbation technique. Fast and reliable solutions to the Helmholtz equation (and to the Schrodinger equation for two dimensional systems) with arbitrarily-shaped boundaries are obtained. We use a pin perturbation to image primarily the microwave electric field amplitude, and we demonstrate the ability to image broken time-reversal symmetry standing wave patterns produced with a magnetized ferrite in the cavity. The whole cavity, including areas very close to the walls, can be imaged using this technique with high spatial resolution over a broad range of frequencies.

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