where the antenna resonates at 2.45 GHz and 5.8 GHz,
which was solely meant for the application in WLAN domain.
Our intention here is to design a compact monopole
antenna, which can be used simultaneously for WLAN as
well as RFID systems.
In this paper, a new compact, 9-shaped and dual-band
printed monopole antenna is presented for RFID and
WLAN. This antenna simultaneously resonates at
2.51 GHz and 5.18 GHz, which are the operating frequency
bands for RFID and WLAN systems respectively.
It allows us to use a single antenna for both the RFID and
WLAN systems. The antenna is constructed on a non-conductor
backed dielectric. 9-shaped strip is printed on one
side of it, which is fed by a microstrip line. The dual-band
performance can be easily obtained for this type of antenna
by fine-tuning the lengths of the 9-shaped strip.