A planar 925-GHz branch line coupler
Paper in proceeding, 2025
Waveguide couplers become increasingly difficult to fabricate at higher terahertz frequencies. In this work, we present a planar branch line coupler with a centre frequency of 925 GHz. The circuit is realized in suspended stripline technology, using a 3-µm silicon-on-insulator membrane. The coupler, embedded via probe transitions in a waveguide system, shows a simulated bandwidth of 18% with return loss and isolation better than 15 dB. The amplitude balance is better than 0.4 dB across this band.
Author
Aditya Goturu
WiTECH
Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory
Malte Dornieden
WiTECH
Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory
Jan Stake
Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory
WiTECH
International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
21622027 (ISSN) 21622035 (eISSN)
50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
Helsinki, Finland,
Helsinki, Finland,
Development of the national infrastructure for microwave and terahertz characterization: expanding the use of the electromagnetic spectrum
Swedish Research Council (VR) (2020-06187), 2021-01-01 -- 2024-12-31.
Far-infrared semiconductor electronics (FIRE)
European Commission (EC) (EC/HE/101142356), 2024-10-01 -- 2029-09-30.
Areas of Advance
Information and Communication Technology
Nanoscience and Nanotechnology
Infrastructure
Kollberg Laboratory
Myfab (incl. Nanofabrication Laboratory)
Subject Categories (SSIF 2025)
Other Electrical Engineering, Electronic Engineering, Information Engineering
Telecommunications
DOI
10.1109/IRMMW-THz61557.2025.11319720