Design and Analysis of a Koch Snowflake Fractal Monopole Antenna for Wideband Communication
Keywords:
Constant gain, fractal geometry, wideband antenna, wireless communicationAbstract
In this article a compact wideband monopole antenna with constant high gain has been designed and fabricated for wideband microwave communication. Koch fractal geometry has been applied for design of this antenna structure. A wide bandwidth of 3.3 GHz (3.0 GHz to 6.3 GHz) has been obtained, which covers the IEEE 802.11 WLAN bands (5.2 GHz and 5.8 GHz) and WiMAX bands (3.5 GHz and 5.5 GHz). The proposed antenna is characterized by its high gain which remains constant throughout the entire operation bandwidth. An average gain of 5.07 dBi has been realized at all the frequencies of interest. The realized antenna gains are 5.01 dBi, 5.07 dBi, 5.09 dBi and 5.11 dBi at frequencies of 3.5 GHz, 5.2 GHz, 5.5 GHz and 5.8 GHz respectively. Good agreement between simulated and measured results justifies the applicability of the proposed antenna for wideband communication purpose, particularly for the WLAN and WiMAX microwave frequency bands of interest.
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