Open AccessAnalytical and Experimental Investigation of Substrate Permittivity and Loss up to 67 GHz
Author(s) -
Patrick Seiler,
Bernhard Klein,
Dirk Plettemeier
Publication year - 2015
Publication title -
ecti transactions on electrical engineering electronics and communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.148
H-Index - 7
ISSN - 1685-9545
DOI - 10.37936/ecti-eec.2015131.170977
Subject(s) - permittivity , coplanar waveguide , microstrip , transmission line , materials science , substrate (aquarium) , planar , wafer , electronic engineering , calibration , optoelectronics , relative permittivity , insertion loss , scattering parameters , line (geometry) , microwave , acoustics , computer science , physics , engineering , telecommunications , dielectric , mathematics , oceanography , computer graphics (images) , geometry , quantum mechanics , geology
In this paper, we characterize the substrate permittivity and overall loss of different planar transmission lines (TL) such as microstrip (MS), coplanar waveguide (CPW) and grounded CPW (GCPW) using on-wafer probes and a thru-reflect-line (TRL) calibration technique. The theory for calculation of the related effective permittivity from S-Parameter measurements is given and numerical simulations are being used for a fast and precise mapping of the effective permittivity to the physical value of the TL's substrate. The method presented can be used for higher frequencies, as long as single mode operation of the TLs is ensured. Thus, an overview on higher order modes in TLs and design rules to suppress them is given. The results up to 67 GHz for the aforementioned TL on a conventional RF substrate are presented and used to evaluate approximate models known from publications.
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