A Capacitive-Gap Coupled Terahertz Planar-Goubau-Line Power Divider
Artikel i vetenskaplig tidskrift, 2023
The planar Goubau line is a single-conductor waveguide with a low attenuation constant at terahertz frequencies compared to other planar waveguides. However, its single-conductor nature complicates the design of circuit elements compared to multi-conductor waveguides, especially when impedance transformation is needed, like in the case of power dividers. In this paper, we present a power divider for a planar Goubau line based on capacitive-gap coupled lines, providing a matched input port. A 900-GHz equal power divider was fabricated on a suspended silicon membrane and was characterized with a Vector Network Analyzer and terahertz probes between 0.5 THz and 1.1 THz. Simulations and measurements are in good agreement, the measured input return loss is lower than 15dB at the design frequency, and the average coupler loss is estimated to be lower than 1 dB when de-embedding the feeding lines.
power dividers
terahertz
Power measurement
On-wafer measurements
splitters
silicon membrane
vector network analyzers (VNA)
Silicon
Scattering parameters
Power dividers
Probes
Frequency conversion
Frequency measurement
planar Goubau lines
scattering parameters
Författare
Juan Cabello Sánchez
Chalmers, Mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik
Vladimir Drakinskiy
Chalmers, Mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik
Jan Stake
Chalmers, Mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik
Helena Rodilla
Chalmers, Mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik
IEEE Transactions on Terahertz Science and Technology
2156-342X (ISSN) 21563446 (eISSN)
Vol. 13 6 698-703Styrkeområden
Informations- och kommunikationsteknik
Infrastruktur
Kollberglaboratoriet
Nanotekniklaboratoriet
Ämneskategorier
Annan elektroteknik och elektronik
DOI
10.1109/TTHZ.2023.3303849