A Broadband Four-Way Waveguide In-phase Power Divider with High Port-Port Isolation

In this paper, a novel four-way power divider based on a six-port waveguide directional coupler is proposed. To realize an excellent four-way power divider with ideal zero amplitude and phase difference in the four output ports, the whole structure is assumed symmetric with respect to the input port. It operates at E-band with a relative bandwidth of 20.8% and the isolation is lower than -20dB. The signal incident on the input port can be fully, evenly, and in-phase coupled to the output port. Good performances show the proposed power divider a good candidate for terahertz radar and communication applications.