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Sociedade Brasileira de Telecomunicações

On-Chip Koch Fractal Antenna Array for 60 GHz ISM Band Application


The Industrial Scientific and Medical band in 60 GHz (57 GHz to 64 GHz) is being proposed to high data rate wireless transmission requiring antennas with efficient design. In this paper we present an on-chip array aperture couple antenna, using Koch fractalgeometry. The proposed antenna is composed by a transmission feed line, an aperture and patch element built in aluminum with 2 micrometers of thickness lying on two layers of silicon with height of 200 micrometers. Those dimensions were calculated according to the effective wavelength for resonance frequency at 60 GHz in order to match at 50 Ohms. The proposed antennas have been simulated using the ANSYS software, and the results show an omnidirectional radiation pattern, with half power beamwidth greater than 124 degrees, gain of 16.7 dBi, and polarization close to the circular polarization with axial ratio less of 2.22.

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