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A Frequency and Pattern Reconfigurable Leaky Wave Antenna Based on HMCSIW and Liquid Crystal Technology

In this paper, a leaky-wave antenna based on half mode corrugated substrate integrated waveguide (HMCSIW) and liquid crystal is proposed, which realizes the frequency and pattern refactoring. The antenna is designed with 4-unit periodic gap to radiate electromagnetic energy to the outside. With electric tuning the liquid crystal material, the frequency and the pattern deflection of the reconfigurable antenna can be continuously adjustable. The working bandwidth is about 5GHz, the main lobe scanning angle can reach 22°, and the actual gain with small loafing of the antenna can reach 9.8dB over the permittivity of liquid crystal from 2.4 to 3.4. It has the advantages of miniaturization, broadband, high gain, low profile, simple structure and easy processing.