Optimized Ultrawideband and Uniplanar Minkowski Fractal Branch Line Coupler

Table 1

Topology and widebanding techniques comparison between 3 dB couplers and power dividers.

Reference number	Transmission line	UWB technique
[1]	Microstrip	Wideband stub matching
[2]	Microstrip	Wideband stub matching
[3]	CPW	Multistage Wilkinson
[4]	Microstrip	Multistage Wilkinson
[5]	Slot line	Multistage 𝑇-junctions
[6]	Microstrip	Multilayer substrate
[7]	Parallel strip lines	Multilayer substrate
[8]	Slot line	Multilayer substrate
This work	Microstrip	Fractal deformation