Broadband transition between waveguide and substrate integrated waveguide based on quasi-Yagi antenna

Analysis and design of rectangular waveguide to substrate integrated waveguide transition with voltage and current probe in W-band

“…One is horizontal structure transition (the ARW and the SIW are connected in horizontal direction) [8,9,10,11]. These transitions have wide bandwidth, but bulky volume.…”

K-band substrate integrated waveguide to rectangular waveguide transition

“…A number of papers have been published in relation with the SIW-to-RWG transition, for which there are two main geometrical configurations. One is a right angle configuration [4,5] in which the two axes are perpendicular, and another is an in-line configuration in which the main axes of both waveguides are collinear [6][7][8][9]. In the right angle configuration, there are one [4] or two [5] etched slots on the broad wall of the SIW to couple the waveguides.…”

“…But this solution has narrow bandwidth and high transmission loss. In the in-line configuration, a fin-line [6] or quasi-Yagi antenna [7] is used to obtain the wide bandwidth. But these kinds of transitions are difficult to design, and the direction of a broad wall of SIW and RWG is perpendicular to each other.…”

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

“…Consequently, an effective transition between SIW and WR-28 standard waveguide is required. There were two types of configurations have been developed, a right-angle where the axes of both waveguides are perpendicular [3,4,5,6,7,8] and an in-line configuration where the both waveguides are collinear [9,10,11,12]. The rightangle transitions employed a coupling aperture cut in the broad wall of SIW to ensure the matching between both waveguides.…”

“…Although some improvement have been done [7,8], the bandwidths are still narrow and not satisfying the requirements of many broadband systems. The in-line transitions were realized by probes, such as radial probe [9], fin line probe [10], substrate taper [11], and antipodal quasi-Yagi antenna probe [12], inserting into smooth height-tapered waveguide or normal waveguide. In [13], two-step architecture was designed in RWG with a probe inserting into waveguide cylindrical hole.…”