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A Hybrid Substrate Integrated Waveguide Cavity based Leaky Wave Antenna Capable of Generating Six Major Beams

The antenna in the current study is an attempt to break the available radiation pattern into multiple beams in order to reduce energy waste. To achieve this, a hybrid substrate integrated waveguide (SIW) is generated by combining a cylindrical cavity with a rectangular cavity. A cross-shaped slot is engraved on the top and bottom face of the cylindrical cavity to allow the antenna to generate six major lobes. At the operating frequency of 5 GHz, the return loss of the antenna is around 21.34 dB. Six major beams with each one having a gain around 6.4 dB and 7.1 dB are generated by the antenna in the current study. The antenna is having a bandwidth of 20 MHz and is linearly polarised.