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Flexible Liquid Crystal Polymer Technologies from Microwave to Terahertz Frequencies

With the emergence of fifth-generation (5G) cellular networks, millimeter-wave (mmW) and terahertz (THz) frequencies have attracted ever-growing interest for advanced wireless applications. The traditional printed circuit board materials have become uncompetitive at such high frequencies due to thei...

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Autores principales: Zhou, Zepeng, Li, Wenqing, Qian, Jun, Liu, Weihong, Wang, Yiming, Zhang, Xijian, Guo, Qinglei, Yashchyshyn, Yevhen, Wang, Qingpu, Shi, Yanpeng, Zhang, Yifei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8877632/
https://www.ncbi.nlm.nih.gov/pubmed/35209131
http://dx.doi.org/10.3390/molecules27041336
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author Zhou, Zepeng
Li, Wenqing
Qian, Jun
Liu, Weihong
Wang, Yiming
Zhang, Xijian
Guo, Qinglei
Yashchyshyn, Yevhen
Wang, Qingpu
Shi, Yanpeng
Zhang, Yifei
author_facet Zhou, Zepeng
Li, Wenqing
Qian, Jun
Liu, Weihong
Wang, Yiming
Zhang, Xijian
Guo, Qinglei
Yashchyshyn, Yevhen
Wang, Qingpu
Shi, Yanpeng
Zhang, Yifei
author_sort Zhou, Zepeng
collection PubMed
description With the emergence of fifth-generation (5G) cellular networks, millimeter-wave (mmW) and terahertz (THz) frequencies have attracted ever-growing interest for advanced wireless applications. The traditional printed circuit board materials have become uncompetitive at such high frequencies due to their high dielectric loss and large water absorption rates. As a promising high-frequency alternative, liquid crystal polymers (LCPs) have been widely investigated for use in circuit devices, chip integration, and module packaging over the last decade due to their low loss tangent up to 1.8 THz and good hermeticity. The previous review articles have summarized the chemical properties of LCP films, flexible LCP antennas, and LCP-based antenna-in-package and system-in-package technologies for 5G applications, although these articles did not discuss synthetic LCP technologies. In addition to wireless applications, the attractive mechanical, chemical, and thermal properties of LCP films enable interesting applications in micro-electro-mechanical systems (MEMS), biomedical electronics, and microfluidics, which have not been summarized to date. Here, a comprehensive review of flexible LCP technologies covering electric circuits, antennas, integration and packaging technologies, front-end modules, MEMS, biomedical devices, and microfluidics from microwave to THz frequencies is presented for the first time, which gives a broad introduction for those outside or just entering the field and provides perspective and breadth for those who are well established in the field.
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spelling pubmed-88776322022-02-26 Flexible Liquid Crystal Polymer Technologies from Microwave to Terahertz Frequencies Zhou, Zepeng Li, Wenqing Qian, Jun Liu, Weihong Wang, Yiming Zhang, Xijian Guo, Qinglei Yashchyshyn, Yevhen Wang, Qingpu Shi, Yanpeng Zhang, Yifei Molecules Review With the emergence of fifth-generation (5G) cellular networks, millimeter-wave (mmW) and terahertz (THz) frequencies have attracted ever-growing interest for advanced wireless applications. The traditional printed circuit board materials have become uncompetitive at such high frequencies due to their high dielectric loss and large water absorption rates. As a promising high-frequency alternative, liquid crystal polymers (LCPs) have been widely investigated for use in circuit devices, chip integration, and module packaging over the last decade due to their low loss tangent up to 1.8 THz and good hermeticity. The previous review articles have summarized the chemical properties of LCP films, flexible LCP antennas, and LCP-based antenna-in-package and system-in-package technologies for 5G applications, although these articles did not discuss synthetic LCP technologies. In addition to wireless applications, the attractive mechanical, chemical, and thermal properties of LCP films enable interesting applications in micro-electro-mechanical systems (MEMS), biomedical electronics, and microfluidics, which have not been summarized to date. Here, a comprehensive review of flexible LCP technologies covering electric circuits, antennas, integration and packaging technologies, front-end modules, MEMS, biomedical devices, and microfluidics from microwave to THz frequencies is presented for the first time, which gives a broad introduction for those outside or just entering the field and provides perspective and breadth for those who are well established in the field. MDPI 2022-02-16 /pmc/articles/PMC8877632/ /pubmed/35209131 http://dx.doi.org/10.3390/molecules27041336 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Review
Zhou, Zepeng
Li, Wenqing
Qian, Jun
Liu, Weihong
Wang, Yiming
Zhang, Xijian
Guo, Qinglei
Yashchyshyn, Yevhen
Wang, Qingpu
Shi, Yanpeng
Zhang, Yifei
Flexible Liquid Crystal Polymer Technologies from Microwave to Terahertz Frequencies
title Flexible Liquid Crystal Polymer Technologies from Microwave to Terahertz Frequencies
title_full Flexible Liquid Crystal Polymer Technologies from Microwave to Terahertz Frequencies
title_fullStr Flexible Liquid Crystal Polymer Technologies from Microwave to Terahertz Frequencies
title_full_unstemmed Flexible Liquid Crystal Polymer Technologies from Microwave to Terahertz Frequencies
title_short Flexible Liquid Crystal Polymer Technologies from Microwave to Terahertz Frequencies
title_sort flexible liquid crystal polymer technologies from microwave to terahertz frequencies
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8877632/
https://www.ncbi.nlm.nih.gov/pubmed/35209131
http://dx.doi.org/10.3390/molecules27041336
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