Dual-band filters for WLAN applications on liquid crystal polymer technology

IEEE MTT-S International Microwave Symposium Digest, 2005. Pub Date : 2005-06-12 DOI:10.1109/MWSYM.2005.1516650

R. Bairavasubramanian, S. Pinel, J. Papapolymerou, J. Laskar, C. Quendo, É. Rius, A. Manchec, C. Person

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引用次数: 8

Abstract

This paper presents the development and performance of several dual-band filters for wireless local area network (WLAN) applications. Three dual-band filters meeting the specifications of 802.11 bg (2.412-2.484 GHz) for the lower band and the specifications of 802.11 a-L (5.180-5.320 GHz), 802.11 a-H (5.745-5.805 GHz) and 802.11 a-L&H (5.180-5.805 GHz) for the upper band are presented. These filters are developed based on dual behavior resonator (DBR) topology in combination with a new stepped impedance approach and are implemented for the first time on liquid crystal polymer (LCP) technology. LCP has been chosen because of its low cost, good RF performance and its ability to act both as a substrate and a package. Measurements show a very low insertion loss of -1.25 dB for the lower band and an insertion loss of -2.4 dB and -1.1 dB for the narrow and broad upper bands respectively. This work demonstrates that the proposed design methodology is simple, efficient and allows easy tuning of the filter parameters to suit different specifications.

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液晶聚合物技术用于WLAN应用的双带滤波器

本文介绍了几种用于无线局域网(WLAN)应用的双频滤波器的发展和性能。给出了下频段802.11 bg (2.412-2.484 GHz)规格和上频段802.11 a-L (5.180-5.320 GHz)、802.11 a-H (5.745-5.805 GHz)和802.11 a-L&H (5.180-5.805 GHz)规格的三种双频滤波器。这些滤波器是基于双行为谐振器(DBR)拓扑结构和一种新的阶跃阻抗方法开发的，并首次在液晶聚合物(LCP)技术上实现。选择LCP的原因是其成本低，射频性能好，可以同时用作基板和封装。测量结果表明，低频段的插入损耗非常低，为-1.25 dB，窄频段和宽频段的插入损耗分别为-2.4 dB和-1.1 dB。这项工作表明，所提出的设计方法是简单，有效的，并允许轻松调整滤波器参数，以适应不同的规格。

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IEEE MTT-S International Microwave Symposium Digest, 2005.

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