W-Band Hybrid Unequal Feeding Network of Waveguide and Substrate Integrated Waveguide for High Efficiency and Low Sidelobe Level Slot Array Antenna Application

Table 1

Comparison between different waveguide-SIW dividers and waveguide-to-SIW transitions.

	Processing	Configuration	Bandwidth ( dB)	Relative bandwidth
Our work	PCB, single layer	Transition + divider	85~107 GHz	22.9%
[1]	PCB, single layer	Transition + divider	90~98 GHz	8.5%
[16]	PCB, single layer	Transition	55~65 GHz	16.7%
[17]	LTCC, multiple layer	Transition	82~100 GHz	19.7%
[18]	PCB, multiple layer	Transition	55~65 GHz	16.7%