  In this study, novel low-loss waveguides and power dividers for
ultra-broadband surface plasmon polaritons (SPPs) are introduced. This article
uses complementary metasurfaces in place of traditional SPP, which are
typically produced as metasurface unit cells on the dielectric sublayer. It has
been demonstrated that the use of complementary metasurfaces considerably
improves wave confinement and inhibits wave propagation. Because of this, it is
anticipated that waveguides and power dividers made from these complimentary
unit cells will have significantly lower losses and greater bandwidth than SPP
used in traditional devices. In the frequency range of 0 GHz to 100 GHz,
waveguides and bent waveguides with complementary metasurface unit cells
exhibit insertion loss greater than 0.5 dB. Utilizing complementary
metasurfaces, symmetric and asymmetric power dividers have been created and
researched. The results of the simulation have shown that using this type of
unit cell in the construction of microwave devices is advantageous.
