Cross-configuration substrate integrated waveguide beamforming network for 1D and 2D beam patterns
Date
2019
Authors
Bartlett, Chad
Bornemann, Jens
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE Access
Abstract
This paper presents the simulated and measured results of a dual-layer substrate integrated waveguide (SIW) beamforming network utilizing an 8 x 8 cross-configuration Butler matrix over a frequency range of 28.5 to 31.5 GHz. By arranging the input ports on the bottom SIW layer and employing dual-layer passband filters as a detachment point, the top SIW layer can be interchanged with the purpose of exploring one-dimensional and two-dimensional broadside beam patterns. Although Butler matrices are not typically utilized for beamforming in this configuration, two examples of interchangeable top layer arrays are demonstrated; the first being a 2 x 8 slot antenna array for 1-D scanning, and the second being a 2 x 4
center-slot array for 2-D scanning. Each of the beamforming network's simulated and measured 10 dB bandwidth is demonstrated over a range of 28.5 to 31.5 GHz. Additional design details and dimensions are specified for the aforementioned passband filter transitions, as well as for each of the slot antenna arrays.
Description
The authors greatly acknowledge Mr. Ian Goode and Dr. Carlos Saavedra of Queens University for their help and expertise with far-field measurements, as well as Dr. Aidin Taeb and Dr. Safieddin Safavi-Naeini of the CAIRS facility at the University of Waterloo for their help and expertise with near-field measurements.
Keywords
Butler matrix, millimeter-wave, slot antenna array, substrate integrated waveguide (SIW), dual-layer SIW filters
Citation
Bartlett, C., & Bornemann, J. (2019). Cross-configuration substrate integrated waveguide beamforming network for 1D and 2D beam patterns. IEEE Access, 7, 151827-151835. 10.1109/ACCESS.2019.2947481