This paper presents a study of a novel monopole antenna for ultra wideband (UWB) applications. Printed on a dielectric substrate FR4 and fed by a 50 microstrip line, a planar circular monopole has been demonstrated to provide an ultra wide 10 dB return loss bandwidth with satisfactory radiation properties. A T-shaped slot, cut in the radiating patch, increase the impedance bandwidth of the proposed antenna up to 131%. The parameters which affect the performance of the antenna in terms of its frequency domain characteristics are investigated. The proposed antenna is optimized by ANSOFT High Frequency Structure Simulator (HFSS). Details of the proposed antenna design and simulated results is described and discussed.
In recent years planar inverted-F antenna stay as one of the most popular antenna used in mobile phone, because of its low profile, light weight and simple structure. This study presents a simulation of a planar inverted-F antenna (PIFA) with a radiating plate to the associated ground plane by a shorting plate and a FR-4 substrate between the ground plane and the radiating plate. The PIFA antenna is fed by a coaxial cable through a SMA connector. In this work the different parameters are changed to observe their effects on the characteristics of PIFA as the resonance frequency, the length of the bandwidth and the radiation pattern. The kind of this PIFA element is to cover a wide frequency band from 2.31 GHz to 2.71 GHz; therefore, we can find these applications: Wi-Fi (2.45GHz), Bluetooth (2.4 GHz) and the two Long Term Evolution bands (LTE 2.3GHz, LTE 2.5GHz) includes.
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