Design of Wideband Flower-Shaped Microstrip Patch Antenna for Portable Applications

The paper discusses design of wideband diagonally symmetrical flower-shaped patch antenna with reduced ground plane. The anticipated antenna is provided microstrip line feed for signal excitation. The antenna is designed and analyzed using finite-element-based simulator HFSS (version 15.0) and provides wide impedance bandwidth between 1.49 and 2.46 GHz. Parametric analysis of significant design parameters is conducted to attain 49% 10-dB impedance bandwidth relative to center frequency of 1.975 GHz. The prototype antenna is fabricated and tested to measure different experimental results including return loss, VSWR, radiation pattern and gain. Reasonable agreement is attained between simulated and measured results. The designed antenna retains an advantage of being low profile and compact in size as overall dimensions of proposed patch antenna is 0.42λ0 × 0.36λ0 × 0.011λ0mm3. Thus, it is considered suitable for GPS (1.57 GHz), GSM (1.8 GHz), Wi-Max (2.3 GHz) and WLAN (2.45 GHz) portable applications.

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