Planar Annular Leaky-Wave Antenna Array with Conical Beam based on Fundamental and −1th Spatial Harmonic Modes

In this paper, a kind of planar annular Leaky-Wave Antenna (LWA) array with conical beam based on fundamental mode and -1th spatial harmonic mode is proposed, which is realized on rectangular waveguide. Slots with constant interval are notched on the top wall of the waveguide for radiation. The LWA can generate conical beam by fundamental mode and -lth spatial harmonic mode of TE₁₀ mode, respectively. Simulated results show that this kind of antenna can be a promising candidate for mobile communication.