Full‐band transition from substrate integrated waveguide to rectangular waveguide

Abstract

A novel substrate integrated waveguide to rectangular waveguide (RWG) transition for effective power transfer is proposed. The substrate taper is inserted into a conventional height-stepped impedance transformer of the RWG region to improve transmission loss and bandwidth. The transition is designed to cover the entire K-band (18-26 GHz), showing a return loss of 20 dB. A back-to-back transition has been fabricated to verify the proposed transition. The experimental results show good agreement with the analysis. The transmission loss of the stand-alone transition is 0.22 dB at 21.7 GHz with a usable bandwidth of 36%.

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

“…The proposed SIW‐to‐waveguide transition shows a broadband performance while allowing a simple structure. It is no need to modify the structure of the standard waveguide . This simple design helps to minimize the process complexity.…”

“…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.…”

Wideband transition from substrate integrated waveguide to rectangular waveguide in K‐band by width profiling

“…This typical transition benefits from its broad bandwidth and is often used for measurement [14]. Due to different dimensions of the cross‐sections, multiple impedance‐matching sections are extensively utilised [15, 16], where a substrate taper could also be inserted into the multi‐section transformer for impedance improvement [17]. Therefore, when there is a height difference between two waveguides (WGs), multi‐step transitions with different height increments, i.e.…”

Broadband Right-Angle Rectangular Waveguide to Substrate Integrated Waveguide Transition with Distributed Impedance Matching Network

“…There are two main geometrical configurations for RWG-to-SIW transitions, namely the in-line and the right-angle configurations, which differ from one another because of the longitudinal axes of both waveguides being respectively collinear or perpendicular. In-line transitions [4][5][6][7][8][9][10][11] use probes or probes together with waveguide tapers and exhibit wide bandwidths at the expense of bulky volumes, thus making this geometry not suitable when compactness is required. Moreover, in-line transitions are not compatible with subarraying in the specific scenario of antenna arrays based on a tile architecture.…”