Allen Gllsson Dept. of ElectrlcalEnglneering
University 01 Mlsslsslppl
PO Box 1848 u&sltv.
MS38677-1848 USA (662)915-5353 tl (662) 915-2731 Fax) tl
[email protected](e-mail)
Planar Antennas for Wireless Communications, by Kin-Lu Wong, Wiley Interscience, 2003, xii-301 pages, $89.95, ISBN 0471 -2661 1-6.
T
he book Planar Antennas for Wireless Communications by K. L. Wong is an applications-oriented book in the Wiley Series in Microwave and Optical Engineering. Planar antennas have become the industry choice for compact and inexpensive designs. The book focuses on antenna designs for specific systems, namely
-
* Cellular mobile systems (GSM, DCS, PCS)
W A N systems in the 2.4 GHz and 5.2 GHz bands that follow the 802.1 I standards.
The t e m “planar” in the book title is somewhat restrictive, since designs with dielectric resonators and small wire antennas are also given. The term “low-profile” would be more descriptive of the book’s contents. Following an overall introduction to the book (Chapter I), Chapters 2-4 are devoted to mobile cellular systems. Chapters 2-3 are concerned with handheld antennas, whereas Chapter 4 is devoted to base stations. The most popular antenna designs for handheld devices are the PIFA (planar inverted-F antenna) and monopoles. Dual-band PlFAs (Chapter Z), with different slot shapes, are thoroughly examined. Triple-band PIFAs that are extensions of dual band designs are also treated. Techniques that affect the impedance bandwidth of such antennas are reviewed with stacking and ground-plane shaping. Monopoles (Chapter 3) are also vely popular choices. Branch-line variations and low-profile monopoles with wires are examined. Much attention is justifiably given to feeding arrangements, which are a very important practical aspect of these antennas. It is worth noting that the references cited at the end of the chapter include antenna patents, in addition to selected academic references. Chapter 4 examines antenna options for base stations. The basic element is the classical patch antenna. Single-band and dualband antenna designs for both linear- and dual-polarization operation are treated. Triple-band (GSMKICSIPCS) designs are also provided.
feeding arrangements. Antennas for terminals utilize printed monopoles. Dual-band PIFAs, for operation in the 2.4 GHz and 5.2 GHz bands, are based on design principles that were laid out for dual-band designs for cellular systems. It has to be noted that the 5.2 GHz band is only the lower band for the IEEE 802.11a standard, with two additional bands in the 5 GHz frequency range to be available. Chapter 6 examines dielectric-resonator antennas (DR), with emphasis on suitable designs for WLAN operation. The use of a ceramic substrate results in dielectric-resonator elements less than 2 mm in the 5.2 GHz band. Circularly polarized radiation is usually achieved with a single feed, which, unfomately, requires careful shaping of the dielectric resonator element. However, new designs presented employ regular dielectric-resonator elements with more complicated feeding that can be easily printed. Integration of antennas for different systems is always a challenge, and an important topic for multimode handsets. The integration approach usually followed is that of having different antennas on the same substrate. Chapter 7 treats two integration cases: Combined DCSiWLAN operation Combined DCSiGPS operation Overall, the book can serve as a useful reference to industrial practitioners. The adequate number of recent references makes the book an excellent starting point for academic research in the field. Reviewed by: Chris Kalialakis Spectrum Monitoring Section National Telecommunications and Post Commission Kifissias Avenue 60 Maroussi GR-I51 25 Greece E-mail:
[email protected]
Chapter 5 is concerned with WLAN antennas, which can be classified as either access-point antennas or for terminal equipment (e.g., laptops).
Large Antennas of the Deep Space Network, by William A. Imbriale, Wiley Interscience, 2003, xv+302 pages, $125.00, ISBN 0-471 -44537- 1.
Multipath fading greatly affects the overall system perfomance, and CP (circular-polarization) antenna operation is desirable. Access-point antennas are variations of a classic patch with special
It is important to say that this book is not a collection of anecdotal bits of history about NASA’s Deep Space Network (DSN). It is an engineering reference, with some historical context.
110
IEEE Antennas and Propagation Magazine, Vol. 46, No. 1, February 2004
