Page 27 - Antennas for Base Stations in Wireless Communications

xxvi Introduction

reader antennas for LF/HF RFID systems. For the RFID applications
at UHF and MWF bands, a number of antennas can be used as reader
antennas, whereas the circularly polarized patch antenna has been the
most widely used antenna.
The technology of UWB positioning is still being developed. UWB
radios employ very short pulses that spread energy over a broad range
of the frequency spectrum. Due to the inherently fine temporal resolu-
tion of UWB, arrived multipath components can be sharply timed at
a receiver to provide accurate time of arrival (TOA) estimates. This
characteristic makes the UWB ideal for high-precision radio position-
ing applications. Mono-station UWB positioning technology features a
highly accurate simple system configuration and has great potential for
indoor positioning applications. The six-element sectored antenna array
shown in this chapter demonstrates the requirements and design con-
siderations for such a system. The antenna configuration, the antenna
element design, and the method for controlling the antenna element’s
beamwidth are expected to be beneficial when designing sectored
antenna arrays for indoor UWB positioning applications.

References
1. Z. N. Chen and M. Y. W. Chia, Broadband Planar Antennas: Design and
Applications, London: John Wiley & Sons, February 2006.
2. W. L. Stutzman and G. A. Thiele, Antenna Theory and Design, 2nd edition, New
York: Artech House, 1997.
3. J. D. Kraus and R. J. Marhefka, Antennas, 3rd edition, New York: McGraw-Hill
Education Singapore, 2001.
4. R. S. Elliott, Antenna Theory & Design, in IEEE Press Series on Electromagnetic
Wave Theory, Rev sub-edition, New York: Wiley-IEEE Press, 2003.
5. C. A. Balanis, Antenna Theory: Analysis and Design, 3rd edition, New York: Wiley-
Interscience, 2005.
6. J. J. Carr (ed.), Practical Antenna Handbook, 4th edition, New York: McGraw-Hill,
2001.
7. K. M. Luk and K. W. Leung (eds.), Dielectric Resonator Antennas, in Antennas
Series, Cambridge, UK: Research Studies Press, 2002.
8. K. L. Wong, Compact and Broadband Microstrip Antennas, New York:
Wiley-Interscience, 2002.
9. R. C. Hansen, Electrically Small, Superdirective, and Superconducting Antennas,
New York: Wiley-Interscience, 2006.
10. J. Volakis (ed.), Antenna Engineering Handbook, 4th edition, New York:
McGraw-Hill Professional, 2007.
11. Z. N. Chen (ed.), Antennas for Portable Devices, London: Wiley, 2007.