Ibrahim, Sarah and Szczepkowski, Grzegorz and Farrell, Ronan
(2014)
The Effect of Impedance Mismatch on Phase
Linearity of GCPW Loaded Transmission Lines and
Shunt Stubs.
In: ISSC 2014, July 26-27 2014, University of Limerick.
Abstract
This paper presents a study on the effect of impedance mismatch on phase
linearity (group delay variations) in grounded coplanar waveguide (GCPW) structures.
Two 400 ps GCPW delay lines were designed using a short circuited stub and a trans-
mission line. The structures were simulated over a wide frequency range (0.1 GHz- 5
GHz) using both ADS circuit model and CST electromagnetic simulation tool. Based
on mathematical analysis and simulation results, impedance mismatch appears to have a
large e_ect on group delay variations in stubs when compared to transmission lines. The
simulated time delay of the short circuited stub shows a maximum delay deviation of
±0.75% and ±7.4% for 1.6% and 5.8% impedance mismatch values, respectively. On the
other hand, the transmission delay line simulation results show only ±0.1% and ±1.5%
for the same impedance mismatch. For the electromagnetic simulation, the presented
results indicate even larger variation of time delay for GCPW short stub as it reaches
±3.75% and ±7.5% at 2 GHz and 4.5 GHz for 1.6% impedance mismatch, respectively
Item Type: |
Conference or Workshop Item
(Paper)
|
Keywords: |
coplanar waveguides; switched delay lines; linear phase; shunt stubs; phase shifters; impedance mismatch; |
Academic Unit: |
Faculty of Science and Engineering > Electronic Engineering |
Item ID: |
5362 |
Depositing User: |
Ronan Farrell
|
Date Deposited: |
04 Sep 2014 13:00 |
Journal or Publication Title: |
Proceedings of ISSC 2014 |
Refereed: |
Yes |
Funders: |
Science Foundation Ireland under Grant No. 10/CE/I1853 |
URI: |
|
Use Licence: |
This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available
here |
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