A New Kind of Circular Polarization Leaky-Wave Antenna Based on Substrate Integrated Waveguide

A New Kind of Circular Polarization Leaky-Wave Antenna Based on Substrate Integrated Waveguide

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A new kind of circular polarization leaky-wave antenna with N-shaped slots cut in the upper side of substrate integrated waveguide (SIW) is investigated and presented.The Conditioner radiation pattern and polarization axial ratio of the leaky-wave antenna are studied.The results show that the width of N-shaped slots has significant effect on the circular polarization property of the hot water bottle antenna.By properly choosing structural parameters, the SIW based leaky-wave antenna can realize circular polarization with excellent axial ratio in 8 GHz satellite band.