Very Low Crosstalk Measurement of Substrate Integrated Coaxial Line (SICL)

Cheng Lu; Liang Yang; Xiaoxing Yin; Hongxin Zhao; Leilei Liu

doi:10.3390/electronics8101174

Electronics (Oct 2019)

Very Low Crosstalk Measurement of Substrate Integrated Coaxial Line (SICL)

Cheng Lu,
Liang Yang,
Xiaoxing Yin,
Hongxin Zhao,
Leilei Liu

Affiliations

Cheng Lu: State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China
Liang Yang: State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China
Xiaoxing Yin: State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China
Hongxin Zhao: State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China
Leilei Liu: College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

DOI: https://doi.org/10.3390/electronics8101174
Journal volume & issue: Vol. 8, no. 10
p. 1174

Abstract

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When designing a microwave circuit involving substrate integrated coaxial lines (SICLs), it is important to know what real crosstalk between SICLs is. A measured crosstalk will be a good reference value in a practical design. In addition, it is also needed to compare and check the crosstalk from the simulation and calculation formula with measured results. However, it is very difficult to measure the crosstalk between SICLs because it is theoretically very low. In this study, for the first time, the crosstalk characteristics of a SICL are evaluated through experimental design and measurements. By adjusting the layout of the structures and implementing controlled experiments, interference caused by the presence of leaks and radiation at the interface and structural transitions is effectively suppressed. The experimental results show that for two parallel SICLs with a length of 30 mm and an interval of 5 mm, the isolation is greater than 80 dB for the measured frequency range of 1−8 GHz, significantly better than the results of the grounded coplanar waveguide (GCPW).

Published in Electronics

ISSN: 2079-9292 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Electronics
Website: http://www.mdpi.com/journal/electronics

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