A Multiband Monopole Antenna with Modified Fractal Loop Parasitic for DCS 1800, WLAN, WiMAX and IMT Advanced Systems

Abstract

A multiband monopole antenna with modified fractal loop parasitic is presented. By adding bow-tie patches and a modified fractal loop to the sides and bottom of a strip line monopole, respectively, the presented antenna can generate the multi-resonant frequencies for the application of wireless communication systems. The characteristics of the presented antenna have been examined by using the simulation software. The comparison between the simulation and measured results confirm the good agreement. The results show good multiband operation with 10 dB impedance bandwidths of 15.55%, 8.75%, and 31.94% at the resonant frequencies of 1.8 GHz, 2.4 GHz, and 3.6 GHz, respectively, which cover the operating band applications of DCS 1800, WLAN (IEEE802.11 b/g), WiMAX, and IMT advanced system (4G mobile communication system).

A Wideband Slot Antenna with Folded Parasitic Line for Multiple Band Operation

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“…Among the well‐known multiband antenna prototypes, the planar and coplanar monopole antennas of various configurations have become popular in the implementation of wireless systems because they provide a cost effective and low profile antenna designs with omnidirectional radiation patterns. Multiband operation of antennas can be achieved by using multiresonators so that each resonator radiates independently at each operating frequency . However, it has been found that using these multiband design techniques, the antenna characteristics could not be easily adjusted due to the effects of mutual couplings between resonators.…”

Rectangular Ring Open-Ended Monopole Antenna for Mobile Dual-Band Operations

“…Various kinds of multi-band antennas have been reported for WLAN, DCS 1,800, and IMT-2000 applications [1]～ [11]. In particular, several papers related to the study of rectangular, ring-shaped monopole antennas have proposed these types of devices [12]～ [15].…”