Multi passband filter with one-twelfth mode miniaturized based on substrate integrated waveguide

Abstract

In this letter, the one-twelfth mode of equilateral hexagonal substrate integrated waveguide (TMSIW) is proposed for the first time.Comparing with traditional substrate integrated waveguide (SIW), the size of TWSIW is only 1/12 which is reduced 11/12 while the resonant frequency of TWSIW is almost unchanged. Loading a complementary split-ring resonator (CSRR) structure, the miniaturization is further improved and the filter selectivity is improved. The filter design uses two of TWSIW which is connected with a microstrip line. The structure is not complex, easy to process, low loss, and the passband has a certain bandwidth. After processing and testing, it shows that the measurement results of filter give good agreement with the simulation results. This filter has advantages in all indexes by comparing with other works.

A high figure of merit of phonon-polariton waveguide modes with hbn/SiO2/graphene /hBN ribs waveguide in mid-infrared range

“…Optical waveguides can be categorized into two types: passive and active. Passive waveguides, such as parallel plate waveguides, metallic rectangular waveguides, metallic circular waveguides, slot lines, striplines, photonic crystal waveguides, and ribbon waveguides, have been widely utilized for interconnecting with external power sources, testing, and packaging purposes [ 4 ]. Waveguides are a popular choice for nanophotonic systems due to their ability to confine light within the metallic walls of the waveguide through total internal reflection (TIR) [ 5 ], the photonic bandgap (PBG) effect [ 6 , 7 ] and guided wave by metallic media (GMM) principle [ 8 ].…”

A high figure of merit of phonon-polariton waveguide modes with hBN/SiO 2 /graphene/hBN ribs waveguide in THz range

“…The manipulation of guided electromagnetic waves is of paramount importance in various fields, including nanophotonics, communications, analog computing, and integrated optics [1,2]. Traditional optical waveguides have been a standard for interconnecting with external power sources, testing, and packaging such as parallel plates waveguide, metallic rectangular waveguide, metallic circular waveguide, slot lines, stripline, photonic crystal waveguides and ribbon waveguides [3]. Waveguides are a popular choice for nanophotonic systems due to their ability to confine light within the metallic walls of the waveguide through total internal reflection (TIR) [4], the photonic bandgap (PBG) effect [5,6] and guided wave by metallic media (GMM) principle [7].…”