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Antenna Coupling Effects in Handheld and Mobile Applications
Antennen-Kopplungseffekte in drahtlo- sen Hand- und Mobilgeräten
Engleski
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This work analyzes antenna coupling effects in small§wireless handheld and mobile devices.§Further it provides suggestions how to minimize them.§Modern communication devices have to support several§standards, while the total system and PCB size needs§to be decreased. This results in rising mutual§coupling. Demands for improved receiver sensitivity§and limited transmit power aggravate the requirements§on separation of the systems.§Part 1 presents information about standards, wave§propagation on PCBs, fundamentals§of 3D electromagnetic FEM simulations and S-parameter§measurement basics. Part 2 deals§with the results from the simulation of simpli ed§mobile phone boards. Part 3 presents the measurement§results of selected con gurations.§It is shown that the optimization of the antennapositions provides an option to relax demands to the§needed lters. In addition modi cations to the PCB§are introduced which signi cantly improve decoupling§between the antennas.
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