Flexible Ultra-Thin Strip-on-Substrate Coaxial Gap Waveguide Technology for Millimeter-Wave
Journal article, 2025
This paper presents Strip-on-Substrate Coaxial Gap Waveguide (SCGW) technology, a novel transmission line for millimeter-wave applications. Its key distinction is an open coaxial structure requiring no electrical contact for the outer conductor. To suppress wave leakage, an electromagnetic bandgap structure - formed by vertically stacked metal pin-bed sheets and a substrate sheet - serves as the outer conductor, encapsulating the strip -type inner conductor. Several fabricated prototypes show that in the 76-81 GHz range, reflection coefficients are better than -10 dB, with transmission losses of 0.25-0.32 dB/cm for single-sided-strip SCGW and 0.18-0.26 dB/cm for double-sided-strip SCGW, confirming the potential of the design for mmWave applications.
low loss
strip-on-substrate
millimeter wave
Coaxial gap waveguide
electromagnetic band gap
Author
Enlin Wang
Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks
Nanjing University of Aeronautics and Astronautics
Abbas Vosoogh
Gapwaves AB
Carlo Bencivenni
Gapwaves AB
Sadegh Mansouri Moghaddam
Gapwaves AB
Jian Yang
Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks
IEEE Antennas and Wireless Propagation Letters
1536-1225 (ISSN) 15485757 (eISSN)
Vol. In PressSubject Categories (SSIF 2025)
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/LAWP.2025.3620407