Changhyeong Lee

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This paper presents an approach to enable a typical GPS receiver to be much less susceptible to intentional disruption such as jamming and change in link environment. Beamforming GPS receivers comprising 4×4 elements or 8×8 ones are designed using metamaterials, for the placement on the body of an aircraft as an airborne vehicle, to cope with(More)
This paper presents the physical implementation of an antenna system for 4-by-4 MIMO communication. Considering the size of the typical antenna for LTE-band wireless communication, it is very difficult to increase the number of the radiators more than two and integrate them in a limited volume of the smart phone. To circumvent this difficulty, compact(More)
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