Design of Millimeter Wave Radar Broadband Microstrip Antenna for Blast Furnace

In this paper, a wideband microstrip array antenna based on millimeter-wave radar is proposed, to achieve strong anti-interference ability and high resolution for detecting the burden surface of blast furnaces. The antenna consists of a Chebyshev main radiation patch array and a button-shaped coplanar parasitic element array. The coplanar parasitic elements alter the coupling between antenna patches to widen the bandwidth. It improves the limitation of the angular resolution of the previous millimeter-wave array antenna due to the problem of insufficient bandwidth. Simulation results show that the −10 dB impedance bandwidth is 7.89 GHz and the antenna main gain reaches 13.92 dBi. The antenna is suitable for high-gain and high anti-interference millimeter-wave radar systems and has greatly reduced dimensions of approximately twenty millimeters, making it applicable for placement in the protective cabin of a blast furnace detection system. It has great potential for solving issues related to the impact of internal environments on blast furnace operations.