Transparent Branch-Line Coupler Using Micro-Metal Mesh Conductive Film

被引：15

作者：

Sa'ad, Bashir Muhammad ^{[1
]}

Rahim, Sharul Kamal Abdul ^{[1
]}

Peter, Thomas ^{[1
]}

Rani, Mohd Subri Bin Abdul ^{[1
]}

Ausordin, Siti Fatimah ^{[1
]}

Zaidel, Dayang Norulfairuz Abang ^{[1
]}

Krishnan, Chandarasekaran ^{[2
]}

机构：

[1] Univ Teknol Malaysia, Fac Elect Engn, WCC, Johor Baharu 81310, Malaysia

[2] Cima NanoTech, St Paul, MN 55114 USA

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2014年 / 24卷 / 12期

关键词：

Beam forming network; branch-line couplers (BLCs); Butler matrices (BMs); intelligent transport systems (ITS); transparent; STUBS;

D O I：

10.1109/LMWC.2014.2361655

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This letter presents the design of a novel transparent 3 dB Branch-Line Coupler (BLC) using a proprietary self-assembling nano-particle technology based Micro-metal Mesh (MM) conductive film. The transparent MM conductive film has a sheet resistance of 0.7 Omega/sq and a visible-light transmission (VBLT) of 75%, resulting in good conductivity and high transparency, respectively. The proposed transparent BLC is mounted on a 2 mm-thick soda-lime glass substrate of dielectric 5.7 and designed to operate at 2.45 GHz. A layer of MM film on the back of the glass serves as a ground. The transparent BLC delivered measured coupling and transmission values of 3.9 and 4.3 dB, respectively. The transparent BLC can be used as a building block for realizing a transparent Butler Matrix (BM) Beam Forming Network (BFN) for Inter/Intra-Vehicle Wireless Communication (IIVWC) in Intelligent Transport System (ITS). Besides being transparent, the proposed BLC has a measured fractional bandwidth of 38.8% and 0.25 mm profile excluding the glass substrate. These advantages greatly enhance the BLC's potential to be used also as a BM building component that can be mounted onto the glass surfaces of buildings for future 5G indoor wireless communications where beam forming is required.

引用

页码：857 / 859

页数：3