Table of Contents
International Journal of Microwave Science and Technology
Volume 2008 (2008), Article ID 287627, 7 pages
http://dx.doi.org/10.1155/2008/287627
Research Article

Design of PCB Impedance Matching Inductors and Antennas for Single-Chip Communication Systems

Electrical Engineering Department, San José State University, San José, CA 95192, USA

Received 15 April 2008; Revised 25 July 2008; Accepted 25 November 2008

Academic Editor: Chang-Ho Lee

Copyright © 2008 J. Chung and S. Hamedi-Hagh. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents the design of an inductor and an antenna for a portable device with GPS and FM capabilities. The inductor is designed to operate at the lower frequency FM band as part of a matching network and the antenna is designed to operate at the higher frequency GPS L1 band. The FR4 PCB used has a thickness of 1.6?mm with a dielectric constant of 3.8 and has two metallization layers. The inductor is designed with 1.5?mm trace width, 3.5 turns, and has a dimension of 14.5?mm 14.5?mm. It has an inductance of 95?nH, a resistance of 2.9?, a self-resonance frequency of 500?MHz, and a maximum Q of 51 from 100?MHz to 200?MHz (FM band). The antenna has a dimension of 49?mm 36?mm and is designed to operate at 1.5754?GHz L1 band. It also has a return loss of -36?dB and a measured bandwidth of 250?MHz.