Open AccessEM Modelling Considerations for mm-Wave On-Chip Antennas
Author(s) -
Flavien Sagouo Minko,
Tinus Stander
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/766/1/012001
Subject(s) - reflection coefficient , planar , chip , antenna (radio) , solver , stack (abstract data type) , broadband , electronic engineering , frequency band , acoustics , physics , computer science , materials science , optics , engineering , telecommunications , computer graphics (images) , programming language
We investigate the inaccuracy of resonant frequency ( f 0 ) estimation incurred by some common simplifications in electromagnetic (EM) simulation of mm-wave on-chip antennas. Using an 88 GHz patch antenna as a device under test (DUT), it is found that using a 2.5D planar EM solver produced highly inaccurate results. Including the bulk silicon and thin nitride in the model stack effected an improvement of 0.8% in estimating f 0 , while replacing individually modelled via arrays with equivalent blocks, and accounting for the etch factor, marginally improved both the estimation of f 0 and reflection coefficient |S 11 |. It is shown that, with the correct modelling choices, the error in f 0 can be reduced to below 50 MHz at E-band, which is within the measurement variation of 880 MHz.