O'Reilly logo

Handbook of Smart Antennas for RFID Systems by Nemai Chandra Karmakar

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

CHAPTER 7

HANDHELD READER ANTENNA AT 5.8 GHz

SUSHIM MUKUL ROY, ISAAC BALBIN

Department of Electrical and Computer Systems Engineering, Monash University, Clayton, Victoria, Australia

NEMAI CHANDRA KARMAKAR

Department of Electrical and Computer Systems Engineering Clayton, Victoria Australia

7.1 INTRODUCTION

Similar to the handheld optical barcode reader, there is a significant market segment for the handheld readers. The examples include the wand for library database management system, apparel tagging and checking of hanging tags, animal tracking, dispatch and inventory control at the manufacturing premises, courier services and deliveries, and so on. The existing systems work in LF and HF band around 132 kHz and 13.56 MHz, respectively, and the handheld readers use a loop antenna (magnetic dipole also called wand as used by magicians) to read the tags. These antennas have omnidirectional patterns to cover maximum reading zone as possible. However, due to the magnetic coupling between the reader and the tag, the distance of the reader is very short, usually less than a few tens of centimeters.

Figure 7.1a shows the configuration of a handheld reader used in the inventory check of books on a library book shelf. As can be seen, the RFID reader consists of a handheld loop antenna and an RFID reader (with battery pack, display, etc.), which are connected by an RF cable for data transmission and reception. The handheld antenna (also called wand) is carried by the hand of a person who ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required