Isolation Improvement with Electromagnetic Band Gap Surfaces
Journal Article - Open Access
Massachusetts Institute of Technology - Lincoln Laboratory Lexington United States
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A new type of engineered surface called an electromagnetic band gap blocks current from flowing at microwave frequencies. One application of this metamaterial is to employ the surface amid electronic devices to improve the electromagnetic isolation between them. The different geometry features of the devices individual unit cells create extra inductances and capacitances for electromagnetic waves. When the unit cell is properly tuned, the aggregate surface will block incoming signals just as a band-stop filter will. This additional isolation allows radio-frequency receivers to operate in closer proximity to transmitters than a normal metal surface would permit.