An Improved E-Plane Waveguide Power Divider Design for 94GHz Dual- Pyramidal Horn Antenna

摘要

In this paper, a waveguide power divider is proposed for a 94 GHz horn antenna. The entire structure was machined using 3D printing technology, and is comprised of two pyramidal horn antennas, a one to two E-plane waveguide power divider, three waveguide bends, and a flange. By introducing a wedge-shaped groove, two trapezium taper ports, and a lambda g/2 extension on the T-junction of the waveguide, we found improved impedance matching of the power divider, and the two output ports had the same phase. Our results show that the bandwidth of the antenna was 3.2% (3 GHz), its gain was higher than 21.2 dBi with an approximately 10 degrees half power beam width at 94 GHz, and it could be applied to a precise location at close range (6 m to 10 m), which is suitable for automotive radar applications.