—A frequency agile triple band microstrip antenna
using defected ground structure for WLAN/WiMAX
application is presented, in which frequency agility is
electronically achieved by changing the bias voltage of varactor
diode. A defected ground structure rectangular patch with dual
inverted L-shaped fed with a cross shaped strip line is used to
achieve multiple bands. Simulated results are validated by the
experimental results and show a good agreement between
simulated and experimental results. The proposed antenna has
small size and operates 2-2.15 GHz, 2.75-3.5204 and 5.4-5.9
GHz. The lower and upper band remains almost constant while
resonance frequency of the middle band is changing with the
bias voltage of varactor diode and frequency agility of 768.4
MHz is achieved. Thus the proposed antenna is suitable to be
used for WLAN and WiMAX applications.
—Multiband antenna, defected ground
structure, frequency agile microstrip antenna, triple band,
Sudarshan Joshi is with the Amrapali Institute of technology and
Sciences, Haldwani, India (e-mail: firstname.lastname@example.org).
A. K. Gautam, was with Electronics and Communication Department,
Govind Ballabh Pant Engineering College, Pauri, India (e-mail:
Rajesh Upadhyay is with the Government Polytechnic, SIDCUL,
Haridwar, India .
Cite:Sudarshan Joshi, A. K. Gautam, and Rajesh Upadhyay, "Frequency Agile Triple Band Microstrip Antenna for
WLAN/WiMAX Application," International Journal of Future Computer and Communication vol. 3, no. 4, pp. 258-261, 2014.