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A three-dimensional packaging solution is introduced for wireless sensor network nodes at microwave frequencies. The package has a cubic geometry with radiating antennas on its surrounding faces. The cube which is called e-CUBE is designed in such a way that its radiation pattern resembles that of a simple dipole. The antenna is designed in a modular way and the final structure has a return loss better than 10 dB and a dipole-shape pattern at 17.2 GHz. Moreover, the measurement and simulation results show very good agreement.
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Enayati et al. (2011) studied this question.
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