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    //-->ANTENNA DESIGN FORMOBILE DEVICESAntenna Design for Mobile Devices,First Edition. Zhijun Zhang.© 2011 John Wiley & Sons (Asia) Pte Ltd. Published 2011 by John Wiley & Sons (Asia) Pte Ltd. ISBN: 978-0-470-82446-7ANTENNA DESIGN FORMOBILE DEVICESZhijun ZhangTsinghua University, ChinaThis edition first published 2011Ó2011 John Wiley & Sons (Asia) Pte LtdRegistered officeJohn Wiley & Sons (Asia) Pte Ltd, 2 Clementi Loop, # 02-01, Singapore 129809For details of our global editorial offices, for customer services and for information about how to apply forpermission to reuse the copyright material in this book please see our website at www.wiley.com.All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in anyform or by any means, electronic, mechanical, photocopying, recording, scanning, or otherwise, except as expresslypermitted by law, without either the prior written permission of the Publisher, or authorization through payment of theappropriate photocopy fee to the Copyright Clearance Center. Requests for permission should be addressed to thePublisher, John Wiley & Sons (Asia) Pte Ltd, 2 Clementi Loop, #02-01, Singapore 129809, tel: 65-64632400,fax: 65-64646912, email: enquiry@wiley.com.Wiley also publishes its books in a variety of electronic formats. Some content that appears in print may not beavailable in electronic books.Designations used by companies to distinguish their products are often claimed as trademarks. All brand names andproduct names used in this book are trade names, service marks, trademarks or registered trademarks of theirrespective owners. The Publisher is not associated with any product or vendor mentioned in this book. Thispublication is designed to provide accurate and authoritative information in regard to the subject matter covered.It is sold on the understanding that the Publisher is not engaged in rendering professional services. If professionaladvice or other expert assistance is required, the services of a competent professional should be sought.Library of Congress Cataloging-in-Publication DataZhang, Zhijun, 1971-Antenna design for mobile devices / Zhijun Zhang.p. cm.Includes bibliographical references and index.ISBN 978-0-470-82446-7 (cloth)1. Radio–Antennas–Design and construction. 2. Mobile communication systems–Equipment andsupplies–Design and construction. 3. Miniature electronic equipment–Design and construction. I. Title.TK6565.A6Z48 2011621.384’135–dc222010047251Print ISBN: 978-0-470-82446-7ePDF ISBN: 978-0-470-82447-4oBook ISBN: 978-0-470-82448-1ePub ISBN: 978-0-470-82833-5Set in 11/13pt Times by Thomson Digital, Noida, India.To my wife Sheng LiContentsPrefaceAcknowledgmentsAbout the AuthorAbbreviations1Introduction1.1 The Evolution of Mobile Antennas1.2 How to Quantitatively Evaluate an Antenna1.3 The Limits of Antenna Designs1.4 The Trade-Offs in Antenna Designs1.5 Mobile Communication and Band AllocationsReferencesAntenna Matching2.1 The Smith Chart2.2 Single Band Matching2.2.1 Matching with Lumped Elements2.2.2 Different Ways to Accomplish a Single Band Matching2.2.3 Matching with Both Transmission Line and LumpedElements2.2.4 Bandwidth Consideration2.3 Dual Band Matching2.4 Reconfigurable Matching2.4.1 Reconfigurable Matching – Varactor-Based2.4.2 Reconfigurable Matching – Switch-BasedReferencesExternal Antenna3.1 Stubby Antennas3.1.1 Single Band Helix Stubby Antennaxixiiixvxvii1381113151719202325283135434849525759616123 [ Pobierz całość w formacie PDF ]

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