Broadband transition between substrate integrated waveguide and rectangular waveguide based on ridged steps

Abstract

A broadband transition between substrate integrated waveguide (SIW) and rectangular waveguide (RWG) is proposed. Five ridged steps in the RWG and a multi-section SIW are designed to expand the bandwidth. The measured results agree well with the simulations, a return loss better than 15 dB and an insertion loss less than 2.45 dB are obtained at the wide band from 23.83 GHz to 40 GHz for a back-to-back structure.

Simple, compact and broadband right-angle transition between substrate integrated waveguide and rectangular waveguide at Ka-band

“…As the operating band increasing to the millimeter‐wave band, the external systems such as a vector network analyzer is connected by the RWG for the purpose of low‐loss. Therefore, a transition between SIW and RWG is required and various transitions have been reported in the literature over the past few years …”

“…The main axis of both waveguides is collinear for in‐line transitions but perpendicular for right‐angle transitions. The in‐line transitions can be easily designed with broadband by using RWG taper or broadband probes inserting into the RWG . Due to a huge different thickness between SIW and RWG, the RWG part of the in‐line ones are fabricated in a complex and bulky form which may be limited in some compact applications.…”

“…Therefore, a transition between SIW and RWG is required and various transitions have been reported in the literature over the past few years. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] As summarized in, 12 there are two types of transitions to meet the requirements of different applications, the in-line one, and the right-angle one. The main axis of both waveguides is collinear for in-line transitions but perpendicular for right-angle transitions.…”

“…The in-line transitions can be easily designed with broadband by using RWG taper or broadband probes inserting into the RWG. [2][3][4][5][6][7][8][9] Due to a huge different thickness between SIW and RWG, the RWG part of the in-line ones are fabricated in a complex and bulky form which may be limited in some compact applications. The right-angle transitions are usually designed with a coupling aperture or slot etched on the broad side of the SIW.…”

Low loss and broadband transition between substrate integrated waveguide and rectangular waveguide

“…Over the last years, the transitions between SIW and waveguide have been developed extensively, which are realized by radial probe , height‐stepped waveguides , quasi‐Yagi antenna , antipodal fin‐lines , and coupling aperture . In , to achieve a broader bandwidth, the standard rectangular waveguide needs to be modified into height‐tapered or height‐stepped waveguide structures, which are somewhat complex from the mechanical view. A quasi‐Yagi antenna is introduced into the transition design , the asymmetric director structure of the quasi‐Yagi antenna leads to high insertion loss.…”