Open AccessUltra‐broadband quantification of CMOS varactors based on vector standing wave measurements in a non‐linear transmission line
Author(s) -
Jamshidifar Mehran,
Bolívar Peter Haring
Publication year - 2019
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2018.5666
Subject(s) - varicap , transmission line , standing wave , broadband , electrical impedance , microwave , materials science , characteristic impedance , transmission (telecommunications) , electric power transmission , acoustics , microwave transmission , capacitance , electrical engineering , optics , physics , engineering , telecommunications , electrode , quantum mechanics
By near‐filed scanning of a non‐linear transmission line (NLTL), both the magnitude and the phase patterns of standing waves are measured. The patterns demonstrate the internal behavior of the NLTL such as inter‐section mismatch, which is not observable by means of microwave network analysers at the device ports. With the analysis of standing waves, transmission line parameters such as the effective permittivity, the characteristics impedance, and varactor capacitances are quantified over a broad frequency range from 10 to 90 GHz.